Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3030 insertions, 0 deletions

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
new file mode 100644
index 000000000..b99b3cc28
--- /dev/null
+++ b/drivers/infiniband/core/verbs.c
@@ -0,0 +1,3030 @@
+/*
+ * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
+ * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
+ * Copyright (c) 2004 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
+ * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <net/addrconf.h>
+#include <linux/security.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_cache.h>
+#include <rdma/ib_addr.h>
+#include <rdma/rw.h>
+#include <rdma/lag.h>
+
+#include "core_priv.h"
+#include <trace/events/rdma_core.h>
+
+static int ib_resolve_eth_dmac(struct ib_device *device,
+			       struct rdma_ah_attr *ah_attr);
+
+static const char * const ib_events[] = {
+	[IB_EVENT_CQ_ERR]		= "CQ error",
+	[IB_EVENT_QP_FATAL]		= "QP fatal error",
+	[IB_EVENT_QP_REQ_ERR]		= "QP request error",
+	[IB_EVENT_QP_ACCESS_ERR]	= "QP access error",
+	[IB_EVENT_COMM_EST]		= "communication established",
+	[IB_EVENT_SQ_DRAINED]		= "send queue drained",
+	[IB_EVENT_PATH_MIG]		= "path migration successful",
+	[IB_EVENT_PATH_MIG_ERR]		= "path migration error",
+	[IB_EVENT_DEVICE_FATAL]		= "device fatal error",
+	[IB_EVENT_PORT_ACTIVE]		= "port active",
+	[IB_EVENT_PORT_ERR]		= "port error",
+	[IB_EVENT_LID_CHANGE]		= "LID change",
+	[IB_EVENT_PKEY_CHANGE]		= "P_key change",
+	[IB_EVENT_SM_CHANGE]		= "SM change",
+	[IB_EVENT_SRQ_ERR]		= "SRQ error",
+	[IB_EVENT_SRQ_LIMIT_REACHED]	= "SRQ limit reached",
+	[IB_EVENT_QP_LAST_WQE_REACHED]	= "last WQE reached",
+	[IB_EVENT_CLIENT_REREGISTER]	= "client reregister",
+	[IB_EVENT_GID_CHANGE]		= "GID changed",
+};
+
+const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
+{
+	size_t index = event;
+
+	return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
+			ib_events[index] : "unrecognized event";
+}
+EXPORT_SYMBOL(ib_event_msg);
+
+static const char * const wc_statuses[] = {
+	[IB_WC_SUCCESS]			= "success",
+	[IB_WC_LOC_LEN_ERR]		= "local length error",
+	[IB_WC_LOC_QP_OP_ERR]		= "local QP operation error",
+	[IB_WC_LOC_EEC_OP_ERR]		= "local EE context operation error",
+	[IB_WC_LOC_PROT_ERR]		= "local protection error",
+	[IB_WC_WR_FLUSH_ERR]		= "WR flushed",
+	[IB_WC_MW_BIND_ERR]		= "memory bind operation error",
+	[IB_WC_BAD_RESP_ERR]		= "bad response error",
+	[IB_WC_LOC_ACCESS_ERR]		= "local access error",
+	[IB_WC_REM_INV_REQ_ERR]		= "remote invalid request error",
+	[IB_WC_REM_ACCESS_ERR]		= "remote access error",
+	[IB_WC_REM_OP_ERR]		= "remote operation error",
+	[IB_WC_RETRY_EXC_ERR]		= "transport retry counter exceeded",
+	[IB_WC_RNR_RETRY_EXC_ERR]	= "RNR retry counter exceeded",
+	[IB_WC_LOC_RDD_VIOL_ERR]	= "local RDD violation error",
+	[IB_WC_REM_INV_RD_REQ_ERR]	= "remote invalid RD request",
+	[IB_WC_REM_ABORT_ERR]		= "operation aborted",
+	[IB_WC_INV_EECN_ERR]		= "invalid EE context number",
+	[IB_WC_INV_EEC_STATE_ERR]	= "invalid EE context state",
+	[IB_WC_FATAL_ERR]		= "fatal error",
+	[IB_WC_RESP_TIMEOUT_ERR]	= "response timeout error",
+	[IB_WC_GENERAL_ERR]		= "general error",
+};
+
+const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
+{
+	size_t index = status;
+
+	return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
+			wc_statuses[index] : "unrecognized status";
+}
+EXPORT_SYMBOL(ib_wc_status_msg);
+
+__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
+{
+	switch (rate) {
+	case IB_RATE_2_5_GBPS: return   1;
+	case IB_RATE_5_GBPS:   return   2;
+	case IB_RATE_10_GBPS:  return   4;
+	case IB_RATE_20_GBPS:  return   8;
+	case IB_RATE_30_GBPS:  return  12;
+	case IB_RATE_40_GBPS:  return  16;
+	case IB_RATE_60_GBPS:  return  24;
+	case IB_RATE_80_GBPS:  return  32;
+	case IB_RATE_120_GBPS: return  48;
+	case IB_RATE_14_GBPS:  return   6;
+	case IB_RATE_56_GBPS:  return  22;
+	case IB_RATE_112_GBPS: return  45;
+	case IB_RATE_168_GBPS: return  67;
+	case IB_RATE_25_GBPS:  return  10;
+	case IB_RATE_100_GBPS: return  40;
+	case IB_RATE_200_GBPS: return  80;
+	case IB_RATE_300_GBPS: return 120;
+	case IB_RATE_28_GBPS:  return  11;
+	case IB_RATE_50_GBPS:  return  20;
+	case IB_RATE_400_GBPS: return 160;
+	case IB_RATE_600_GBPS: return 240;
+	default:	       return  -1;
+	}
+}
+EXPORT_SYMBOL(ib_rate_to_mult);
+
+__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
+{
+	switch (mult) {
+	case 1:   return IB_RATE_2_5_GBPS;
+	case 2:   return IB_RATE_5_GBPS;
+	case 4:   return IB_RATE_10_GBPS;
+	case 8:   return IB_RATE_20_GBPS;
+	case 12:  return IB_RATE_30_GBPS;
+	case 16:  return IB_RATE_40_GBPS;
+	case 24:  return IB_RATE_60_GBPS;
+	case 32:  return IB_RATE_80_GBPS;
+	case 48:  return IB_RATE_120_GBPS;
+	case 6:   return IB_RATE_14_GBPS;
+	case 22:  return IB_RATE_56_GBPS;
+	case 45:  return IB_RATE_112_GBPS;
+	case 67:  return IB_RATE_168_GBPS;
+	case 10:  return IB_RATE_25_GBPS;
+	case 40:  return IB_RATE_100_GBPS;
+	case 80:  return IB_RATE_200_GBPS;
+	case 120: return IB_RATE_300_GBPS;
+	case 11:  return IB_RATE_28_GBPS;
+	case 20:  return IB_RATE_50_GBPS;
+	case 160: return IB_RATE_400_GBPS;
+	case 240: return IB_RATE_600_GBPS;
+	default:  return IB_RATE_PORT_CURRENT;
+	}
+}
+EXPORT_SYMBOL(mult_to_ib_rate);
+
+__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
+{
+	switch (rate) {
+	case IB_RATE_2_5_GBPS: return 2500;
+	case IB_RATE_5_GBPS:   return 5000;
+	case IB_RATE_10_GBPS:  return 10000;
+	case IB_RATE_20_GBPS:  return 20000;
+	case IB_RATE_30_GBPS:  return 30000;
+	case IB_RATE_40_GBPS:  return 40000;
+	case IB_RATE_60_GBPS:  return 60000;
+	case IB_RATE_80_GBPS:  return 80000;
+	case IB_RATE_120_GBPS: return 120000;
+	case IB_RATE_14_GBPS:  return 14062;
+	case IB_RATE_56_GBPS:  return 56250;
+	case IB_RATE_112_GBPS: return 112500;
+	case IB_RATE_168_GBPS: return 168750;
+	case IB_RATE_25_GBPS:  return 25781;
+	case IB_RATE_100_GBPS: return 103125;
+	case IB_RATE_200_GBPS: return 206250;
+	case IB_RATE_300_GBPS: return 309375;
+	case IB_RATE_28_GBPS:  return 28125;
+	case IB_RATE_50_GBPS:  return 53125;
+	case IB_RATE_400_GBPS: return 425000;
+	case IB_RATE_600_GBPS: return 637500;
+	default:	       return -1;
+	}
+}
+EXPORT_SYMBOL(ib_rate_to_mbps);
+
+__attribute_const__ enum rdma_transport_type
+rdma_node_get_transport(unsigned int node_type)
+{
+
+	if (node_type == RDMA_NODE_USNIC)
+		return RDMA_TRANSPORT_USNIC;
+	if (node_type == RDMA_NODE_USNIC_UDP)
+		return RDMA_TRANSPORT_USNIC_UDP;
+	if (node_type == RDMA_NODE_RNIC)
+		return RDMA_TRANSPORT_IWARP;
+	if (node_type == RDMA_NODE_UNSPECIFIED)
+		return RDMA_TRANSPORT_UNSPECIFIED;
+
+	return RDMA_TRANSPORT_IB;
+}
+EXPORT_SYMBOL(rdma_node_get_transport);
+
+enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
+					      u32 port_num)
+{
+	enum rdma_transport_type lt;
+	if (device->ops.get_link_layer)
+		return device->ops.get_link_layer(device, port_num);
+
+	lt = rdma_node_get_transport(device->node_type);
+	if (lt == RDMA_TRANSPORT_IB)
+		return IB_LINK_LAYER_INFINIBAND;
+
+	return IB_LINK_LAYER_ETHERNET;
+}
+EXPORT_SYMBOL(rdma_port_get_link_layer);
+
+/* Protection domains */
+
+/**
+ * __ib_alloc_pd - Allocates an unused protection domain.
+ * @device: The device on which to allocate the protection domain.
+ * @flags: protection domain flags
+ * @caller: caller's build-time module name
+ *
+ * A protection domain object provides an association between QPs, shared
+ * receive queues, address handles, memory regions, and memory windows.
+ *
+ * Every PD has a local_dma_lkey which can be used as the lkey value for local
+ * memory operations.
+ */
+struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
+		const char *caller)
+{
+	struct ib_pd *pd;
+	int mr_access_flags = 0;
+	int ret;
+
+	pd = rdma_zalloc_drv_obj(device, ib_pd);
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
+
+	pd->device = device;
+	pd->flags = flags;
+
+	rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
+	rdma_restrack_set_name(&pd->res, caller);
+
+	ret = device->ops.alloc_pd(pd, NULL);
+	if (ret) {
+		rdma_restrack_put(&pd->res);
+		kfree(pd);
+		return ERR_PTR(ret);
+	}
+	rdma_restrack_add(&pd->res);
+
+	if (device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY)
+		pd->local_dma_lkey = device->local_dma_lkey;
+	else
+		mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
+
+	if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
+		pr_warn("%s: enabling unsafe global rkey\n", caller);
+		mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
+	}
+
+	if (mr_access_flags) {
+		struct ib_mr *mr;
+
+		mr = pd->device->ops.get_dma_mr(pd, mr_access_flags);
+		if (IS_ERR(mr)) {
+			ib_dealloc_pd(pd);
+			return ERR_CAST(mr);
+		}
+
+		mr->device	= pd->device;
+		mr->pd		= pd;
+		mr->type        = IB_MR_TYPE_DMA;
+		mr->uobject	= NULL;
+		mr->need_inval	= false;
+
+		pd->__internal_mr = mr;
+
+		if (!(device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY))
+			pd->local_dma_lkey = pd->__internal_mr->lkey;
+
+		if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
+			pd->unsafe_global_rkey = pd->__internal_mr->rkey;
+	}
+
+	return pd;
+}
+EXPORT_SYMBOL(__ib_alloc_pd);
+
+/**
+ * ib_dealloc_pd_user - Deallocates a protection domain.
+ * @pd: The protection domain to deallocate.
+ * @udata: Valid user data or NULL for kernel object
+ *
+ * It is an error to call this function while any resources in the pd still
+ * exist.  The caller is responsible to synchronously destroy them and
+ * guarantee no new allocations will happen.
+ */
+int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
+{
+	int ret;
+
+	if (pd->__internal_mr) {
+		ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL);
+		WARN_ON(ret);
+		pd->__internal_mr = NULL;
+	}
+
+	ret = pd->device->ops.dealloc_pd(pd, udata);
+	if (ret)
+		return ret;
+
+	rdma_restrack_del(&pd->res);
+	kfree(pd);
+	return ret;
+}
+EXPORT_SYMBOL(ib_dealloc_pd_user);
+
+/* Address handles */
+
+/**
+ * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
+ * @dest:       Pointer to destination ah_attr. Contents of the destination
+ *              pointer is assumed to be invalid and attribute are overwritten.
+ * @src:        Pointer to source ah_attr.
+ */
+void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
+		       const struct rdma_ah_attr *src)
+{
+	*dest = *src;
+	if (dest->grh.sgid_attr)
+		rdma_hold_gid_attr(dest->grh.sgid_attr);
+}
+EXPORT_SYMBOL(rdma_copy_ah_attr);
+
+/**
+ * rdma_replace_ah_attr - Replace valid ah_attr with new new one.
+ * @old:        Pointer to existing ah_attr which needs to be replaced.
+ *              old is assumed to be valid or zero'd
+ * @new:        Pointer to the new ah_attr.
+ *
+ * rdma_replace_ah_attr() first releases any reference in the old ah_attr if
+ * old the ah_attr is valid; after that it copies the new attribute and holds
+ * the reference to the replaced ah_attr.
+ */
+void rdma_replace_ah_attr(struct rdma_ah_attr *old,
+			  const struct rdma_ah_attr *new)
+{
+	rdma_destroy_ah_attr(old);
+	*old = *new;
+	if (old->grh.sgid_attr)
+		rdma_hold_gid_attr(old->grh.sgid_attr);
+}
+EXPORT_SYMBOL(rdma_replace_ah_attr);
+
+/**
+ * rdma_move_ah_attr - Move ah_attr pointed by source to destination.
+ * @dest:       Pointer to destination ah_attr to copy to.
+ *              dest is assumed to be valid or zero'd
+ * @src:        Pointer to the new ah_attr.
+ *
+ * rdma_move_ah_attr() first releases any reference in the destination ah_attr
+ * if it is valid. This also transfers ownership of internal references from
+ * src to dest, making src invalid in the process. No new reference of the src
+ * ah_attr is taken.
+ */
+void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
+{
+	rdma_destroy_ah_attr(dest);
+	*dest = *src;
+	src->grh.sgid_attr = NULL;
+}
+EXPORT_SYMBOL(rdma_move_ah_attr);
+
+/*
+ * Validate that the rdma_ah_attr is valid for the device before passing it
+ * off to the driver.
+ */
+static int rdma_check_ah_attr(struct ib_device *device,
+			      struct rdma_ah_attr *ah_attr)
+{
+	if (!rdma_is_port_valid(device, ah_attr->port_num))
+		return -EINVAL;
+
+	if ((rdma_is_grh_required(device, ah_attr->port_num) ||
+	     ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&
+	    !(ah_attr->ah_flags & IB_AH_GRH))
+		return -EINVAL;
+
+	if (ah_attr->grh.sgid_attr) {
+		/*
+		 * Make sure the passed sgid_attr is consistent with the
+		 * parameters
+		 */
+		if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
+		    ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+/*
+ * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
+ * On success the caller is responsible to call rdma_unfill_sgid_attr().
+ */
+static int rdma_fill_sgid_attr(struct ib_device *device,
+			       struct rdma_ah_attr *ah_attr,
+			       const struct ib_gid_attr **old_sgid_attr)
+{
+	const struct ib_gid_attr *sgid_attr;
+	struct ib_global_route *grh;
+	int ret;
+
+	*old_sgid_attr = ah_attr->grh.sgid_attr;
+
+	ret = rdma_check_ah_attr(device, ah_attr);
+	if (ret)
+		return ret;
+
+	if (!(ah_attr->ah_flags & IB_AH_GRH))
+		return 0;
+
+	grh = rdma_ah_retrieve_grh(ah_attr);
+	if (grh->sgid_attr)
+		return 0;
+
+	sgid_attr =
+		rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);
+	if (IS_ERR(sgid_attr))
+		return PTR_ERR(sgid_attr);
+
+	/* Move ownerhip of the kref into the ah_attr */
+	grh->sgid_attr = sgid_attr;
+	return 0;
+}
+
+static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,
+				  const struct ib_gid_attr *old_sgid_attr)
+{
+	/*
+	 * Fill didn't change anything, the caller retains ownership of
+	 * whatever it passed
+	 */
+	if (ah_attr->grh.sgid_attr == old_sgid_attr)
+		return;
+
+	/*
+	 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller
+	 * doesn't see any change in the rdma_ah_attr. If we get here
+	 * old_sgid_attr is NULL.
+	 */
+	rdma_destroy_ah_attr(ah_attr);
+}
+
+static const struct ib_gid_attr *
+rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
+		      const struct ib_gid_attr *old_attr)
+{
+	if (old_attr)
+		rdma_put_gid_attr(old_attr);
+	if (ah_attr->ah_flags & IB_AH_GRH) {
+		rdma_hold_gid_attr(ah_attr->grh.sgid_attr);
+		return ah_attr->grh.sgid_attr;
+	}
+	return NULL;
+}
+
+static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
+				     struct rdma_ah_attr *ah_attr,
+				     u32 flags,
+				     struct ib_udata *udata,
+				     struct net_device *xmit_slave)
+{
+	struct rdma_ah_init_attr init_attr = {};
+	struct ib_device *device = pd->device;
+	struct ib_ah *ah;
+	int ret;
+
+	might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
+
+	if (!udata && !device->ops.create_ah)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	ah = rdma_zalloc_drv_obj_gfp(
+		device, ib_ah,
+		(flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);
+	if (!ah)
+		return ERR_PTR(-ENOMEM);
+
+	ah->device = device;
+	ah->pd = pd;
+	ah->type = ah_attr->type;
+	ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);
+	init_attr.ah_attr = ah_attr;
+	init_attr.flags = flags;
+	init_attr.xmit_slave = xmit_slave;
+
+	if (udata)
+		ret = device->ops.create_user_ah(ah, &init_attr, udata);
+	else
+		ret = device->ops.create_ah(ah, &init_attr, NULL);
+	if (ret) {
+		if (ah->sgid_attr)
+			rdma_put_gid_attr(ah->sgid_attr);
+		kfree(ah);
+		return ERR_PTR(ret);
+	}
+
+	atomic_inc(&pd->usecnt);
+	return ah;
+}
+
+/**
+ * rdma_create_ah - Creates an address handle for the
+ * given address vector.
+ * @pd: The protection domain associated with the address handle.
+ * @ah_attr: The attributes of the address vector.
+ * @flags: Create address handle flags (see enum rdma_create_ah_flags).
+ *
+ * It returns 0 on success and returns appropriate error code on error.
+ * The address handle is used to reference a local or global destination
+ * in all UD QP post sends.
+ */
+struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
+			     u32 flags)
+{
+	const struct ib_gid_attr *old_sgid_attr;
+	struct net_device *slave;
+	struct ib_ah *ah;
+	int ret;
+
+	ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
+	if (ret)
+		return ERR_PTR(ret);
+	slave = rdma_lag_get_ah_roce_slave(pd->device, ah_attr,
+					   (flags & RDMA_CREATE_AH_SLEEPABLE) ?
+					   GFP_KERNEL : GFP_ATOMIC);
+	if (IS_ERR(slave)) {
+		rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
+		return (void *)slave;
+	}
+	ah = _rdma_create_ah(pd, ah_attr, flags, NULL, slave);
+	rdma_lag_put_ah_roce_slave(slave);
+	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
+	return ah;
+}
+EXPORT_SYMBOL(rdma_create_ah);
+
+/**
+ * rdma_create_user_ah - Creates an address handle for the
+ * given address vector.
+ * It resolves destination mac address for ah attribute of RoCE type.
+ * @pd: The protection domain associated with the address handle.
+ * @ah_attr: The attributes of the address vector.
+ * @udata: pointer to user's input output buffer information need by
+ *         provider driver.
+ *
+ * It returns 0 on success and returns appropriate error code on error.
+ * The address handle is used to reference a local or global destination
+ * in all UD QP post sends.
+ */
+struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
+				  struct rdma_ah_attr *ah_attr,
+				  struct ib_udata *udata)
+{
+	const struct ib_gid_attr *old_sgid_attr;
+	struct ib_ah *ah;
+	int err;
+
+	err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
+	if (err)
+		return ERR_PTR(err);
+
+	if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
+		err = ib_resolve_eth_dmac(pd->device, ah_attr);
+		if (err) {
+			ah = ERR_PTR(err);
+			goto out;
+		}
+	}
+
+	ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE,
+			     udata, NULL);
+
+out:
+	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
+	return ah;
+}
+EXPORT_SYMBOL(rdma_create_user_ah);
+
+int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
+{
+	const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
+	struct iphdr ip4h_checked;
+	const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
+
+	/* If it's IPv6, the version must be 6, otherwise, the first
+	 * 20 bytes (before the IPv4 header) are garbled.
+	 */
+	if (ip6h->version != 6)
+		return (ip4h->version == 4) ? 4 : 0;
+	/* version may be 6 or 4 because the first 20 bytes could be garbled */
+
+	/* RoCE v2 requires no options, thus header length
+	 * must be 5 words
+	 */
+	if (ip4h->ihl != 5)
+		return 6;
+
+	/* Verify checksum.
+	 * We can't write on scattered buffers so we need to copy to
+	 * temp buffer.
+	 */
+	memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
+	ip4h_checked.check = 0;
+	ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
+	/* if IPv4 header checksum is OK, believe it */
+	if (ip4h->check == ip4h_checked.check)
+		return 4;
+	return 6;
+}
+EXPORT_SYMBOL(ib_get_rdma_header_version);
+
+static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
+						     u32 port_num,
+						     const struct ib_grh *grh)
+{
+	int grh_version;
+
+	if (rdma_protocol_ib(device, port_num))
+		return RDMA_NETWORK_IB;
+
+	grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
+
+	if (grh_version == 4)
+		return RDMA_NETWORK_IPV4;
+
+	if (grh->next_hdr == IPPROTO_UDP)
+		return RDMA_NETWORK_IPV6;
+
+	return RDMA_NETWORK_ROCE_V1;
+}
+
+struct find_gid_index_context {
+	u16 vlan_id;
+	enum ib_gid_type gid_type;
+};
+
+static bool find_gid_index(const union ib_gid *gid,
+			   const struct ib_gid_attr *gid_attr,
+			   void *context)
+{
+	struct find_gid_index_context *ctx = context;
+	u16 vlan_id = 0xffff;
+	int ret;
+
+	if (ctx->gid_type != gid_attr->gid_type)
+		return false;
+
+	ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
+	if (ret)
+		return false;
+
+	return ctx->vlan_id == vlan_id;
+}
+
+static const struct ib_gid_attr *
+get_sgid_attr_from_eth(struct ib_device *device, u32 port_num,
+		       u16 vlan_id, const union ib_gid *sgid,
+		       enum ib_gid_type gid_type)
+{
+	struct find_gid_index_context context = {.vlan_id = vlan_id,
+						 .gid_type = gid_type};
+
+	return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
+				       &context);
+}
+
+int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
+			      enum rdma_network_type net_type,
+			      union ib_gid *sgid, union ib_gid *dgid)
+{
+	struct sockaddr_in  src_in;
+	struct sockaddr_in  dst_in;
+	__be32 src_saddr, dst_saddr;
+
+	if (!sgid || !dgid)
+		return -EINVAL;
+
+	if (net_type == RDMA_NETWORK_IPV4) {
+		memcpy(&src_in.sin_addr.s_addr,
+		       &hdr->roce4grh.saddr, 4);
+		memcpy(&dst_in.sin_addr.s_addr,
+		       &hdr->roce4grh.daddr, 4);
+		src_saddr = src_in.sin_addr.s_addr;
+		dst_saddr = dst_in.sin_addr.s_addr;
+		ipv6_addr_set_v4mapped(src_saddr,
+				       (struct in6_addr *)sgid);
+		ipv6_addr_set_v4mapped(dst_saddr,
+				       (struct in6_addr *)dgid);
+		return 0;
+	} else if (net_type == RDMA_NETWORK_IPV6 ||
+		   net_type == RDMA_NETWORK_IB || RDMA_NETWORK_ROCE_V1) {
+		*dgid = hdr->ibgrh.dgid;
+		*sgid = hdr->ibgrh.sgid;
+		return 0;
+	} else {
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
+
+/* Resolve destination mac address and hop limit for unicast destination
+ * GID entry, considering the source GID entry as well.
+ * ah_attribute must have have valid port_num, sgid_index.
+ */
+static int ib_resolve_unicast_gid_dmac(struct ib_device *device,
+				       struct rdma_ah_attr *ah_attr)
+{
+	struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
+	const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
+	int hop_limit = 0xff;
+	int ret = 0;
+
+	/* If destination is link local and source GID is RoCEv1,
+	 * IP stack is not used.
+	 */
+	if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&
+	    sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
+		rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
+				ah_attr->roce.dmac);
+		return ret;
+	}
+
+	ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
+					   ah_attr->roce.dmac,
+					   sgid_attr, &hop_limit);
+
+	grh->hop_limit = hop_limit;
+	return ret;
+}
+
+/*
+ * This function initializes address handle attributes from the incoming packet.
+ * Incoming packet has dgid of the receiver node on which this code is
+ * getting executed and, sgid contains the GID of the sender.
+ *
+ * When resolving mac address of destination, the arrived dgid is used
+ * as sgid and, sgid is used as dgid because sgid contains destinations
+ * GID whom to respond to.
+ *
+ * On success the caller is responsible to call rdma_destroy_ah_attr on the
+ * attr.
+ */
+int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num,
+			    const struct ib_wc *wc, const struct ib_grh *grh,
+			    struct rdma_ah_attr *ah_attr)
+{
+	u32 flow_class;
+	int ret;
+	enum rdma_network_type net_type = RDMA_NETWORK_IB;
+	enum ib_gid_type gid_type = IB_GID_TYPE_IB;
+	const struct ib_gid_attr *sgid_attr;
+	int hoplimit = 0xff;
+	union ib_gid dgid;
+	union ib_gid sgid;
+
+	might_sleep();
+
+	memset(ah_attr, 0, sizeof *ah_attr);
+	ah_attr->type = rdma_ah_find_type(device, port_num);
+	if (rdma_cap_eth_ah(device, port_num)) {
+		if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
+			net_type = wc->network_hdr_type;
+		else
+			net_type = ib_get_net_type_by_grh(device, port_num, grh);
+		gid_type = ib_network_to_gid_type(net_type);
+	}
+	ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
+					&sgid, &dgid);
+	if (ret)
+		return ret;
+
+	rdma_ah_set_sl(ah_attr, wc->sl);
+	rdma_ah_set_port_num(ah_attr, port_num);
+
+	if (rdma_protocol_roce(device, port_num)) {
+		u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
+				wc->vlan_id : 0xffff;
+
+		if (!(wc->wc_flags & IB_WC_GRH))
+			return -EPROTOTYPE;
+
+		sgid_attr = get_sgid_attr_from_eth(device, port_num,
+						   vlan_id, &dgid,
+						   gid_type);
+		if (IS_ERR(sgid_attr))
+			return PTR_ERR(sgid_attr);
+
+		flow_class = be32_to_cpu(grh->version_tclass_flow);
+		rdma_move_grh_sgid_attr(ah_attr,
+					&sgid,
+					flow_class & 0xFFFFF,
+					hoplimit,
+					(flow_class >> 20) & 0xFF,
+					sgid_attr);
+
+		ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
+		if (ret)
+			rdma_destroy_ah_attr(ah_attr);
+
+		return ret;
+	} else {
+		rdma_ah_set_dlid(ah_attr, wc->slid);
+		rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
+
+		if ((wc->wc_flags & IB_WC_GRH) == 0)
+			return 0;
+
+		if (dgid.global.interface_id !=
+					cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
+			sgid_attr = rdma_find_gid_by_port(
+				device, &dgid, IB_GID_TYPE_IB, port_num, NULL);
+		} else
+			sgid_attr = rdma_get_gid_attr(device, port_num, 0);
+
+		if (IS_ERR(sgid_attr))
+			return PTR_ERR(sgid_attr);
+		flow_class = be32_to_cpu(grh->version_tclass_flow);
+		rdma_move_grh_sgid_attr(ah_attr,
+					&sgid,
+					flow_class & 0xFFFFF,
+					hoplimit,
+					(flow_class >> 20) & 0xFF,
+					sgid_attr);
+
+		return 0;
+	}
+}
+EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
+
+/**
+ * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership
+ * of the reference
+ *
+ * @attr:	Pointer to AH attribute structure
+ * @dgid:	Destination GID
+ * @flow_label:	Flow label
+ * @hop_limit:	Hop limit
+ * @traffic_class: traffic class
+ * @sgid_attr:	Pointer to SGID attribute
+ *
+ * This takes ownership of the sgid_attr reference. The caller must ensure
+ * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after
+ * calling this function.
+ */
+void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
+			     u32 flow_label, u8 hop_limit, u8 traffic_class,
+			     const struct ib_gid_attr *sgid_attr)
+{
+	rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,
+			traffic_class);
+	attr->grh.sgid_attr = sgid_attr;
+}
+EXPORT_SYMBOL(rdma_move_grh_sgid_attr);
+
+/**
+ * rdma_destroy_ah_attr - Release reference to SGID attribute of
+ * ah attribute.
+ * @ah_attr: Pointer to ah attribute
+ *
+ * Release reference to the SGID attribute of the ah attribute if it is
+ * non NULL. It is safe to call this multiple times, and safe to call it on
+ * a zero initialized ah_attr.
+ */
+void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)
+{
+	if (ah_attr->grh.sgid_attr) {
+		rdma_put_gid_attr(ah_attr->grh.sgid_attr);
+		ah_attr->grh.sgid_attr = NULL;
+	}
+}
+EXPORT_SYMBOL(rdma_destroy_ah_attr);
+
+struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
+				   const struct ib_grh *grh, u32 port_num)
+{
+	struct rdma_ah_attr ah_attr;
+	struct ib_ah *ah;
+	int ret;
+
+	ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
+
+	rdma_destroy_ah_attr(&ah_attr);
+	return ah;
+}
+EXPORT_SYMBOL(ib_create_ah_from_wc);
+
+int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
+{
+	const struct ib_gid_attr *old_sgid_attr;
+	int ret;
+
+	if (ah->type != ah_attr->type)
+		return -EINVAL;
+
+	ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
+	if (ret)
+		return ret;
+
+	ret = ah->device->ops.modify_ah ?
+		ah->device->ops.modify_ah(ah, ah_attr) :
+		-EOPNOTSUPP;
+
+	ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
+	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
+	return ret;
+}
+EXPORT_SYMBOL(rdma_modify_ah);
+
+int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
+{
+	ah_attr->grh.sgid_attr = NULL;
+
+	return ah->device->ops.query_ah ?
+		ah->device->ops.query_ah(ah, ah_attr) :
+		-EOPNOTSUPP;
+}
+EXPORT_SYMBOL(rdma_query_ah);
+
+int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)
+{
+	const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
+	struct ib_pd *pd;
+	int ret;
+
+	might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);
+
+	pd = ah->pd;
+
+	ret = ah->device->ops.destroy_ah(ah, flags);
+	if (ret)
+		return ret;
+
+	atomic_dec(&pd->usecnt);
+	if (sgid_attr)
+		rdma_put_gid_attr(sgid_attr);
+
+	kfree(ah);
+	return ret;
+}
+EXPORT_SYMBOL(rdma_destroy_ah_user);
+
+/* Shared receive queues */
+
+/**
+ * ib_create_srq_user - Creates a SRQ associated with the specified protection
+ *   domain.
+ * @pd: The protection domain associated with the SRQ.
+ * @srq_init_attr: A list of initial attributes required to create the
+ *   SRQ.  If SRQ creation succeeds, then the attributes are updated to
+ *   the actual capabilities of the created SRQ.
+ * @uobject: uobject pointer if this is not a kernel SRQ
+ * @udata: udata pointer if this is not a kernel SRQ
+ *
+ * srq_attr->max_wr and srq_attr->max_sge are read the determine the
+ * requested size of the SRQ, and set to the actual values allocated
+ * on return.  If ib_create_srq() succeeds, then max_wr and max_sge
+ * will always be at least as large as the requested values.
+ */
+struct ib_srq *ib_create_srq_user(struct ib_pd *pd,
+				  struct ib_srq_init_attr *srq_init_attr,
+				  struct ib_usrq_object *uobject,
+				  struct ib_udata *udata)
+{
+	struct ib_srq *srq;
+	int ret;
+
+	srq = rdma_zalloc_drv_obj(pd->device, ib_srq);
+	if (!srq)
+		return ERR_PTR(-ENOMEM);
+
+	srq->device = pd->device;
+	srq->pd = pd;
+	srq->event_handler = srq_init_attr->event_handler;
+	srq->srq_context = srq_init_attr->srq_context;
+	srq->srq_type = srq_init_attr->srq_type;
+	srq->uobject = uobject;
+
+	if (ib_srq_has_cq(srq->srq_type)) {
+		srq->ext.cq = srq_init_attr->ext.cq;
+		atomic_inc(&srq->ext.cq->usecnt);
+	}
+	if (srq->srq_type == IB_SRQT_XRC) {
+		srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
+		if (srq->ext.xrc.xrcd)
+			atomic_inc(&srq->ext.xrc.xrcd->usecnt);
+	}
+	atomic_inc(&pd->usecnt);
+
+	rdma_restrack_new(&srq->res, RDMA_RESTRACK_SRQ);
+	rdma_restrack_parent_name(&srq->res, &pd->res);
+
+	ret = pd->device->ops.create_srq(srq, srq_init_attr, udata);
+	if (ret) {
+		rdma_restrack_put(&srq->res);
+		atomic_dec(&pd->usecnt);
+		if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd)
+			atomic_dec(&srq->ext.xrc.xrcd->usecnt);
+		if (ib_srq_has_cq(srq->srq_type))
+			atomic_dec(&srq->ext.cq->usecnt);
+		kfree(srq);
+		return ERR_PTR(ret);
+	}
+
+	rdma_restrack_add(&srq->res);
+
+	return srq;
+}
+EXPORT_SYMBOL(ib_create_srq_user);
+
+int ib_modify_srq(struct ib_srq *srq,
+		  struct ib_srq_attr *srq_attr,
+		  enum ib_srq_attr_mask srq_attr_mask)
+{
+	return srq->device->ops.modify_srq ?
+		srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask,
+					    NULL) : -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(ib_modify_srq);
+
+int ib_query_srq(struct ib_srq *srq,
+		 struct ib_srq_attr *srq_attr)
+{
+	return srq->device->ops.query_srq ?
+		srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(ib_query_srq);
+
+int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)
+{
+	int ret;
+
+	if (atomic_read(&srq->usecnt))
+		return -EBUSY;
+
+	ret = srq->device->ops.destroy_srq(srq, udata);
+	if (ret)
+		return ret;
+
+	atomic_dec(&srq->pd->usecnt);
+	if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd)
+		atomic_dec(&srq->ext.xrc.xrcd->usecnt);
+	if (ib_srq_has_cq(srq->srq_type))
+		atomic_dec(&srq->ext.cq->usecnt);
+	rdma_restrack_del(&srq->res);
+	kfree(srq);
+
+	return ret;
+}
+EXPORT_SYMBOL(ib_destroy_srq_user);
+
+/* Queue pairs */
+
+static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
+{
+	struct ib_qp *qp = context;
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp->device->qp_open_list_lock, flags);
+	list_for_each_entry(event->element.qp, &qp->open_list, open_list)
+		if (event->element.qp->event_handler)
+			event->element.qp->event_handler(event, event->element.qp->qp_context);
+	spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags);
+}
+
+static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
+				  void (*event_handler)(struct ib_event *, void *),
+				  void *qp_context)
+{
+	struct ib_qp *qp;
+	unsigned long flags;
+	int err;
+
+	qp = kzalloc(sizeof *qp, GFP_KERNEL);
+	if (!qp)
+		return ERR_PTR(-ENOMEM);
+
+	qp->real_qp = real_qp;
+	err = ib_open_shared_qp_security(qp, real_qp->device);
+	if (err) {
+		kfree(qp);
+		return ERR_PTR(err);
+	}
+
+	qp->real_qp = real_qp;
+	atomic_inc(&real_qp->usecnt);
+	qp->device = real_qp->device;
+	qp->event_handler = event_handler;
+	qp->qp_context = qp_context;
+	qp->qp_num = real_qp->qp_num;
+	qp->qp_type = real_qp->qp_type;
+
+	spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
+	list_add(&qp->open_list, &real_qp->open_list);
+	spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
+
+	return qp;
+}
+
+struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
+			 struct ib_qp_open_attr *qp_open_attr)
+{
+	struct ib_qp *qp, *real_qp;
+
+	if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
+		return ERR_PTR(-EINVAL);
+
+	down_read(&xrcd->tgt_qps_rwsem);
+	real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num);
+	if (!real_qp) {
+		up_read(&xrcd->tgt_qps_rwsem);
+		return ERR_PTR(-EINVAL);
+	}
+	qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
+			  qp_open_attr->qp_context);
+	up_read(&xrcd->tgt_qps_rwsem);
+	return qp;
+}
+EXPORT_SYMBOL(ib_open_qp);
+
+static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,
+					struct ib_qp_init_attr *qp_init_attr)
+{
+	struct ib_qp *real_qp = qp;
+	int err;
+
+	qp->event_handler = __ib_shared_qp_event_handler;
+	qp->qp_context = qp;
+	qp->pd = NULL;
+	qp->send_cq = qp->recv_cq = NULL;
+	qp->srq = NULL;
+	qp->xrcd = qp_init_attr->xrcd;
+	atomic_inc(&qp_init_attr->xrcd->usecnt);
+	INIT_LIST_HEAD(&qp->open_list);
+
+	qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
+			  qp_init_attr->qp_context);
+	if (IS_ERR(qp))
+		return qp;
+
+	err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num,
+			      real_qp, GFP_KERNEL));
+	if (err) {
+		ib_close_qp(qp);
+		return ERR_PTR(err);
+	}
+	return qp;
+}
+
+static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd,
+			       struct ib_qp_init_attr *attr,
+			       struct ib_udata *udata,
+			       struct ib_uqp_object *uobj, const char *caller)
+{
+	struct ib_udata dummy = {};
+	struct ib_qp *qp;
+	int ret;
+
+	if (!dev->ops.create_qp)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	qp = rdma_zalloc_drv_obj_numa(dev, ib_qp);
+	if (!qp)
+		return ERR_PTR(-ENOMEM);
+
+	qp->device = dev;
+	qp->pd = pd;
+	qp->uobject = uobj;
+	qp->real_qp = qp;
+
+	qp->qp_type = attr->qp_type;
+	qp->rwq_ind_tbl = attr->rwq_ind_tbl;
+	qp->srq = attr->srq;
+	qp->event_handler = attr->event_handler;
+	qp->port = attr->port_num;
+	qp->qp_context = attr->qp_context;
+
+	spin_lock_init(&qp->mr_lock);
+	INIT_LIST_HEAD(&qp->rdma_mrs);
+	INIT_LIST_HEAD(&qp->sig_mrs);
+
+	qp->send_cq = attr->send_cq;
+	qp->recv_cq = attr->recv_cq;
+
+	rdma_restrack_new(&qp->res, RDMA_RESTRACK_QP);
+	WARN_ONCE(!udata && !caller, "Missing kernel QP owner");
+	rdma_restrack_set_name(&qp->res, udata ? NULL : caller);
+	ret = dev->ops.create_qp(qp, attr, udata);
+	if (ret)
+		goto err_create;
+
+	/*
+	 * TODO: The mlx4 internally overwrites send_cq and recv_cq.
+	 * Unfortunately, it is not an easy task to fix that driver.
+	 */
+	qp->send_cq = attr->send_cq;
+	qp->recv_cq = attr->recv_cq;
+
+	ret = ib_create_qp_security(qp, dev);
+	if (ret)
+		goto err_security;
+
+	rdma_restrack_add(&qp->res);
+	return qp;
+
+err_security:
+	qp->device->ops.destroy_qp(qp, udata ? &dummy : NULL);
+err_create:
+	rdma_restrack_put(&qp->res);
+	kfree(qp);
+	return ERR_PTR(ret);
+
+}
+
+/**
+ * ib_create_qp_user - Creates a QP associated with the specified protection
+ *   domain.
+ * @dev: IB device
+ * @pd: The protection domain associated with the QP.
+ * @attr: A list of initial attributes required to create the
+ *   QP.  If QP creation succeeds, then the attributes are updated to
+ *   the actual capabilities of the created QP.
+ * @udata: User data
+ * @uobj: uverbs obect
+ * @caller: caller's build-time module name
+ */
+struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd,
+				struct ib_qp_init_attr *attr,
+				struct ib_udata *udata,
+				struct ib_uqp_object *uobj, const char *caller)
+{
+	struct ib_qp *qp, *xrc_qp;
+
+	if (attr->qp_type == IB_QPT_XRC_TGT)
+		qp = create_qp(dev, pd, attr, NULL, NULL, caller);
+	else
+		qp = create_qp(dev, pd, attr, udata, uobj, NULL);
+	if (attr->qp_type != IB_QPT_XRC_TGT || IS_ERR(qp))
+		return qp;
+
+	xrc_qp = create_xrc_qp_user(qp, attr);
+	if (IS_ERR(xrc_qp)) {
+		ib_destroy_qp(qp);
+		return xrc_qp;
+	}
+
+	xrc_qp->uobject = uobj;
+	return xrc_qp;
+}
+EXPORT_SYMBOL(ib_create_qp_user);
+
+void ib_qp_usecnt_inc(struct ib_qp *qp)
+{
+	if (qp->pd)
+		atomic_inc(&qp->pd->usecnt);
+	if (qp->send_cq)
+		atomic_inc(&qp->send_cq->usecnt);
+	if (qp->recv_cq)
+		atomic_inc(&qp->recv_cq->usecnt);
+	if (qp->srq)
+		atomic_inc(&qp->srq->usecnt);
+	if (qp->rwq_ind_tbl)
+		atomic_inc(&qp->rwq_ind_tbl->usecnt);
+}
+EXPORT_SYMBOL(ib_qp_usecnt_inc);
+
+void ib_qp_usecnt_dec(struct ib_qp *qp)
+{
+	if (qp->rwq_ind_tbl)
+		atomic_dec(&qp->rwq_ind_tbl->usecnt);
+	if (qp->srq)
+		atomic_dec(&qp->srq->usecnt);
+	if (qp->recv_cq)
+		atomic_dec(&qp->recv_cq->usecnt);
+	if (qp->send_cq)
+		atomic_dec(&qp->send_cq->usecnt);
+	if (qp->pd)
+		atomic_dec(&qp->pd->usecnt);
+}
+EXPORT_SYMBOL(ib_qp_usecnt_dec);
+
+struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
+				  struct ib_qp_init_attr *qp_init_attr,
+				  const char *caller)
+{
+	struct ib_device *device = pd->device;
+	struct ib_qp *qp;
+	int ret;
+
+	/*
+	 * If the callers is using the RDMA API calculate the resources
+	 * needed for the RDMA READ/WRITE operations.
+	 *
+	 * Note that these callers need to pass in a port number.
+	 */
+	if (qp_init_attr->cap.max_rdma_ctxs)
+		rdma_rw_init_qp(device, qp_init_attr);
+
+	qp = create_qp(device, pd, qp_init_attr, NULL, NULL, caller);
+	if (IS_ERR(qp))
+		return qp;
+
+	ib_qp_usecnt_inc(qp);
+
+	if (qp_init_attr->cap.max_rdma_ctxs) {
+		ret = rdma_rw_init_mrs(qp, qp_init_attr);
+		if (ret)
+			goto err;
+	}
+
+	/*
+	 * Note: all hw drivers guarantee that max_send_sge is lower than
+	 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
+	 * max_send_sge <= max_sge_rd.
+	 */
+	qp->max_write_sge = qp_init_attr->cap.max_send_sge;
+	qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
+				 device->attrs.max_sge_rd);
+	if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN)
+		qp->integrity_en = true;
+
+	return qp;
+
+err:
+	ib_destroy_qp(qp);
+	return ERR_PTR(ret);
+
+}
+EXPORT_SYMBOL(ib_create_qp_kernel);
+
+static const struct {
+	int			valid;
+	enum ib_qp_attr_mask	req_param[IB_QPT_MAX];
+	enum ib_qp_attr_mask	opt_param[IB_QPT_MAX];
+} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
+	[IB_QPS_RESET] = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_INIT]  = {
+			.valid = 1,
+			.req_param = {
+				[IB_QPT_UD]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_QKEY),
+				[IB_QPT_RAW_PACKET] = IB_QP_PORT,
+				[IB_QPT_UC]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_RC]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+			}
+		},
+	},
+	[IB_QPS_INIT]  = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 },
+		[IB_QPS_INIT]  = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_QKEY),
+				[IB_QPT_UC]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_RC]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX		|
+						IB_QP_PORT			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+			}
+		},
+		[IB_QPS_RTR]   = {
+			.valid = 1,
+			.req_param = {
+				[IB_QPT_UC]  = (IB_QP_AV			|
+						IB_QP_PATH_MTU			|
+						IB_QP_DEST_QPN			|
+						IB_QP_RQ_PSN),
+				[IB_QPT_RC]  = (IB_QP_AV			|
+						IB_QP_PATH_MTU			|
+						IB_QP_DEST_QPN			|
+						IB_QP_RQ_PSN			|
+						IB_QP_MAX_DEST_RD_ATOMIC	|
+						IB_QP_MIN_RNR_TIMER),
+				[IB_QPT_XRC_INI] = (IB_QP_AV			|
+						IB_QP_PATH_MTU			|
+						IB_QP_DEST_QPN			|
+						IB_QP_RQ_PSN),
+				[IB_QPT_XRC_TGT] = (IB_QP_AV			|
+						IB_QP_PATH_MTU			|
+						IB_QP_DEST_QPN			|
+						IB_QP_RQ_PSN			|
+						IB_QP_MAX_DEST_RD_ATOMIC	|
+						IB_QP_MIN_RNR_TIMER),
+			},
+			.opt_param = {
+				 [IB_QPT_UD]  = (IB_QP_PKEY_INDEX		|
+						 IB_QP_QKEY),
+				 [IB_QPT_UC]  = (IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PKEY_INDEX),
+				 [IB_QPT_RC]  = (IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PKEY_INDEX),
+				 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH		|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PKEY_INDEX),
+				 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH		|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PKEY_INDEX),
+				 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
+						 IB_QP_QKEY),
+				 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
+						 IB_QP_QKEY),
+			 },
+		},
+	},
+	[IB_QPS_RTR]   = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 },
+		[IB_QPS_RTS]   = {
+			.valid = 1,
+			.req_param = {
+				[IB_QPT_UD]  = IB_QP_SQ_PSN,
+				[IB_QPT_UC]  = IB_QP_SQ_PSN,
+				[IB_QPT_RC]  = (IB_QP_TIMEOUT			|
+						IB_QP_RETRY_CNT			|
+						IB_QP_RNR_RETRY			|
+						IB_QP_SQ_PSN			|
+						IB_QP_MAX_QP_RD_ATOMIC),
+				[IB_QPT_XRC_INI] = (IB_QP_TIMEOUT		|
+						IB_QP_RETRY_CNT			|
+						IB_QP_RNR_RETRY			|
+						IB_QP_SQ_PSN			|
+						IB_QP_MAX_QP_RD_ATOMIC),
+				[IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT		|
+						IB_QP_SQ_PSN),
+				[IB_QPT_SMI] = IB_QP_SQ_PSN,
+				[IB_QPT_GSI] = IB_QP_SQ_PSN,
+			},
+			.opt_param = {
+				 [IB_QPT_UD]  = (IB_QP_CUR_STATE		|
+						 IB_QP_QKEY),
+				 [IB_QPT_UC]  = (IB_QP_CUR_STATE		|
+						 IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PATH_MIG_STATE),
+				 [IB_QPT_RC]  = (IB_QP_CUR_STATE		|
+						 IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_MIN_RNR_TIMER		|
+						 IB_QP_PATH_MIG_STATE),
+				 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE		|
+						 IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_PATH_MIG_STATE),
+				 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE		|
+						 IB_QP_ALT_PATH			|
+						 IB_QP_ACCESS_FLAGS		|
+						 IB_QP_MIN_RNR_TIMER		|
+						 IB_QP_PATH_MIG_STATE),
+				 [IB_QPT_SMI] = (IB_QP_CUR_STATE		|
+						 IB_QP_QKEY),
+				 [IB_QPT_GSI] = (IB_QP_CUR_STATE		|
+						 IB_QP_QKEY),
+				 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
+			 }
+		}
+	},
+	[IB_QPS_RTS]   = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 },
+		[IB_QPS_RTS]   = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_UC]  = (IB_QP_CUR_STATE			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_ALT_PATH			|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_RC]  = (IB_QP_CUR_STATE			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_ALT_PATH			|
+						IB_QP_PATH_MIG_STATE		|
+						IB_QP_MIN_RNR_TIMER),
+				[IB_QPT_XRC_INI] = (IB_QP_CUR_STATE		|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_ALT_PATH			|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE		|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_ALT_PATH			|
+						IB_QP_PATH_MIG_STATE		|
+						IB_QP_MIN_RNR_TIMER),
+				[IB_QPT_SMI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
+			}
+		},
+		[IB_QPS_SQD]   = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
+				[IB_QPT_UC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
+				[IB_QPT_RC]  = IB_QP_EN_SQD_ASYNC_NOTIFY,
+				[IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
+				[IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
+				[IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
+				[IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
+			}
+		},
+	},
+	[IB_QPS_SQD]   = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 },
+		[IB_QPS_RTS]   = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_UC]  = (IB_QP_CUR_STATE			|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_RC]  = (IB_QP_CUR_STATE			|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_MIN_RNR_TIMER		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_XRC_INI] = (IB_QP_CUR_STATE		|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE		|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_MIN_RNR_TIMER		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_SMI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+			}
+		},
+		[IB_QPS_SQD]   = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+				[IB_QPT_UC]  = (IB_QP_AV			|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PKEY_INDEX		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_RC]  = (IB_QP_PORT			|
+						IB_QP_AV			|
+						IB_QP_TIMEOUT			|
+						IB_QP_RETRY_CNT			|
+						IB_QP_RNR_RETRY			|
+						IB_QP_MAX_QP_RD_ATOMIC		|
+						IB_QP_MAX_DEST_RD_ATOMIC	|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PKEY_INDEX		|
+						IB_QP_MIN_RNR_TIMER		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_XRC_INI] = (IB_QP_PORT			|
+						IB_QP_AV			|
+						IB_QP_TIMEOUT			|
+						IB_QP_RETRY_CNT			|
+						IB_QP_RNR_RETRY			|
+						IB_QP_MAX_QP_RD_ATOMIC		|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PKEY_INDEX		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_XRC_TGT] = (IB_QP_PORT			|
+						IB_QP_AV			|
+						IB_QP_TIMEOUT			|
+						IB_QP_MAX_DEST_RD_ATOMIC	|
+						IB_QP_ALT_PATH			|
+						IB_QP_ACCESS_FLAGS		|
+						IB_QP_PKEY_INDEX		|
+						IB_QP_MIN_RNR_TIMER		|
+						IB_QP_PATH_MIG_STATE),
+				[IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
+						IB_QP_QKEY),
+			}
+		}
+	},
+	[IB_QPS_SQE]   = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 },
+		[IB_QPS_RTS]   = {
+			.valid = 1,
+			.opt_param = {
+				[IB_QPT_UD]  = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_UC]  = (IB_QP_CUR_STATE			|
+						IB_QP_ACCESS_FLAGS),
+				[IB_QPT_SMI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
+						IB_QP_QKEY),
+			}
+		}
+	},
+	[IB_QPS_ERR] = {
+		[IB_QPS_RESET] = { .valid = 1 },
+		[IB_QPS_ERR] =   { .valid = 1 }
+	}
+};
+
+bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
+			enum ib_qp_type type, enum ib_qp_attr_mask mask)
+{
+	enum ib_qp_attr_mask req_param, opt_param;
+
+	if (mask & IB_QP_CUR_STATE  &&
+	    cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
+	    cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
+		return false;
+
+	if (!qp_state_table[cur_state][next_state].valid)
+		return false;
+
+	req_param = qp_state_table[cur_state][next_state].req_param[type];
+	opt_param = qp_state_table[cur_state][next_state].opt_param[type];
+
+	if ((mask & req_param) != req_param)
+		return false;
+
+	if (mask & ~(req_param | opt_param | IB_QP_STATE))
+		return false;
+
+	return true;
+}
+EXPORT_SYMBOL(ib_modify_qp_is_ok);
+
+/**
+ * ib_resolve_eth_dmac - Resolve destination mac address
+ * @device:		Device to consider
+ * @ah_attr:		address handle attribute which describes the
+ *			source and destination parameters
+ * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It
+ * returns 0 on success or appropriate error code. It initializes the
+ * necessary ah_attr fields when call is successful.
+ */
+static int ib_resolve_eth_dmac(struct ib_device *device,
+			       struct rdma_ah_attr *ah_attr)
+{
+	int ret = 0;
+
+	if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
+		if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
+			__be32 addr = 0;
+
+			memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
+			ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
+		} else {
+			ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
+					(char *)ah_attr->roce.dmac);
+		}
+	} else {
+		ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
+	}
+	return ret;
+}
+
+static bool is_qp_type_connected(const struct ib_qp *qp)
+{
+	return (qp->qp_type == IB_QPT_UC ||
+		qp->qp_type == IB_QPT_RC ||
+		qp->qp_type == IB_QPT_XRC_INI ||
+		qp->qp_type == IB_QPT_XRC_TGT);
+}
+
+/*
+ * IB core internal function to perform QP attributes modification.
+ */
+static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
+			 int attr_mask, struct ib_udata *udata)
+{
+	u32 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
+	const struct ib_gid_attr *old_sgid_attr_av;
+	const struct ib_gid_attr *old_sgid_attr_alt_av;
+	int ret;
+
+	attr->xmit_slave = NULL;
+	if (attr_mask & IB_QP_AV) {
+		ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
+					  &old_sgid_attr_av);
+		if (ret)
+			return ret;
+
+		if (attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
+		    is_qp_type_connected(qp)) {
+			struct net_device *slave;
+
+			/*
+			 * If the user provided the qp_attr then we have to
+			 * resolve it. Kerne users have to provide already
+			 * resolved rdma_ah_attr's.
+			 */
+			if (udata) {
+				ret = ib_resolve_eth_dmac(qp->device,
+							  &attr->ah_attr);
+				if (ret)
+					goto out_av;
+			}
+			slave = rdma_lag_get_ah_roce_slave(qp->device,
+							   &attr->ah_attr,
+							   GFP_KERNEL);
+			if (IS_ERR(slave)) {
+				ret = PTR_ERR(slave);
+				goto out_av;
+			}
+			attr->xmit_slave = slave;
+		}
+	}
+	if (attr_mask & IB_QP_ALT_PATH) {
+		/*
+		 * FIXME: This does not track the migration state, so if the
+		 * user loads a new alternate path after the HW has migrated
+		 * from primary->alternate we will keep the wrong
+		 * references. This is OK for IB because the reference
+		 * counting does not serve any functional purpose.
+		 */
+		ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
+					  &old_sgid_attr_alt_av);
+		if (ret)
+			goto out_av;
+
+		/*
+		 * Today the core code can only handle alternate paths and APM
+		 * for IB. Ban them in roce mode.
+		 */
+		if (!(rdma_protocol_ib(qp->device,
+				       attr->alt_ah_attr.port_num) &&
+		      rdma_protocol_ib(qp->device, port))) {
+			ret = -EINVAL;
+			goto out;
+		}
+	}
+
+	if (rdma_ib_or_roce(qp->device, port)) {
+		if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
+			dev_warn(&qp->device->dev,
+				 "%s rq_psn overflow, masking to 24 bits\n",
+				 __func__);
+			attr->rq_psn &= 0xffffff;
+		}
+
+		if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
+			dev_warn(&qp->device->dev,
+				 " %s sq_psn overflow, masking to 24 bits\n",
+				 __func__);
+			attr->sq_psn &= 0xffffff;
+		}
+	}
+
+	/*
+	 * Bind this qp to a counter automatically based on the rdma counter
+	 * rules. This only set in RST2INIT with port specified
+	 */
+	if (!qp->counter && (attr_mask & IB_QP_PORT) &&
+	    ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT))
+		rdma_counter_bind_qp_auto(qp, attr->port_num);
+
+	ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
+	if (ret)
+		goto out;
+
+	if (attr_mask & IB_QP_PORT)
+		qp->port = attr->port_num;
+	if (attr_mask & IB_QP_AV)
+		qp->av_sgid_attr =
+			rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);
+	if (attr_mask & IB_QP_ALT_PATH)
+		qp->alt_path_sgid_attr = rdma_update_sgid_attr(
+			&attr->alt_ah_attr, qp->alt_path_sgid_attr);
+
+out:
+	if (attr_mask & IB_QP_ALT_PATH)
+		rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);
+out_av:
+	if (attr_mask & IB_QP_AV) {
+		rdma_lag_put_ah_roce_slave(attr->xmit_slave);
+		rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);
+	}
+	return ret;
+}
+
+/**
+ * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
+ * @ib_qp: The QP to modify.
+ * @attr: On input, specifies the QP attributes to modify.  On output,
+ *   the current values of selected QP attributes are returned.
+ * @attr_mask: A bit-mask used to specify which attributes of the QP
+ *   are being modified.
+ * @udata: pointer to user's input output buffer information
+ *   are being modified.
+ * It returns 0 on success and returns appropriate error code on error.
+ */
+int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
+			    int attr_mask, struct ib_udata *udata)
+{
+	return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
+}
+EXPORT_SYMBOL(ib_modify_qp_with_udata);
+
+int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width)
+{
+	int rc;
+	u32 netdev_speed;
+	struct net_device *netdev;
+	struct ethtool_link_ksettings lksettings;
+
+	if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
+		return -EINVAL;
+
+	netdev = ib_device_get_netdev(dev, port_num);
+	if (!netdev)
+		return -ENODEV;
+
+	rtnl_lock();
+	rc = __ethtool_get_link_ksettings(netdev, &lksettings);
+	rtnl_unlock();
+
+	dev_put(netdev);
+
+	if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) {
+		netdev_speed = lksettings.base.speed;
+	} else {
+		netdev_speed = SPEED_1000;
+		pr_warn("%s speed is unknown, defaulting to %u\n", netdev->name,
+			netdev_speed);
+	}
+
+	if (netdev_speed <= SPEED_1000) {
+		*width = IB_WIDTH_1X;
+		*speed = IB_SPEED_SDR;
+	} else if (netdev_speed <= SPEED_10000) {
+		*width = IB_WIDTH_1X;
+		*speed = IB_SPEED_FDR10;
+	} else if (netdev_speed <= SPEED_20000) {
+		*width = IB_WIDTH_4X;
+		*speed = IB_SPEED_DDR;
+	} else if (netdev_speed <= SPEED_25000) {
+		*width = IB_WIDTH_1X;
+		*speed = IB_SPEED_EDR;
+	} else if (netdev_speed <= SPEED_40000) {
+		*width = IB_WIDTH_4X;
+		*speed = IB_SPEED_FDR10;
+	} else {
+		*width = IB_WIDTH_4X;
+		*speed = IB_SPEED_EDR;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(ib_get_eth_speed);
+
+int ib_modify_qp(struct ib_qp *qp,
+		 struct ib_qp_attr *qp_attr,
+		 int qp_attr_mask)
+{
+	return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
+}
+EXPORT_SYMBOL(ib_modify_qp);
+
+int ib_query_qp(struct ib_qp *qp,
+		struct ib_qp_attr *qp_attr,
+		int qp_attr_mask,
+		struct ib_qp_init_attr *qp_init_attr)
+{
+	qp_attr->ah_attr.grh.sgid_attr = NULL;
+	qp_attr->alt_ah_attr.grh.sgid_attr = NULL;
+
+	return qp->device->ops.query_qp ?
+		qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask,
+					 qp_init_attr) : -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(ib_query_qp);
+
+int ib_close_qp(struct ib_qp *qp)
+{
+	struct ib_qp *real_qp;
+	unsigned long flags;
+
+	real_qp = qp->real_qp;
+	if (real_qp == qp)
+		return -EINVAL;
+
+	spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
+	list_del(&qp->open_list);
+	spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
+
+	atomic_dec(&real_qp->usecnt);
+	if (qp->qp_sec)
+		ib_close_shared_qp_security(qp->qp_sec);
+	kfree(qp);
+
+	return 0;
+}
+EXPORT_SYMBOL(ib_close_qp);
+
+static int __ib_destroy_shared_qp(struct ib_qp *qp)
+{
+	struct ib_xrcd *xrcd;
+	struct ib_qp *real_qp;
+	int ret;
+
+	real_qp = qp->real_qp;
+	xrcd = real_qp->xrcd;
+	down_write(&xrcd->tgt_qps_rwsem);
+	ib_close_qp(qp);
+	if (atomic_read(&real_qp->usecnt) == 0)
+		xa_erase(&xrcd->tgt_qps, real_qp->qp_num);
+	else
+		real_qp = NULL;
+	up_write(&xrcd->tgt_qps_rwsem);
+
+	if (real_qp) {
+		ret = ib_destroy_qp(real_qp);
+		if (!ret)
+			atomic_dec(&xrcd->usecnt);
+	}
+
+	return 0;
+}
+
+int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)
+{
+	const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;
+	const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;
+	struct ib_qp_security *sec;
+	int ret;
+
+	WARN_ON_ONCE(qp->mrs_used > 0);
+
+	if (atomic_read(&qp->usecnt))
+		return -EBUSY;
+
+	if (qp->real_qp != qp)
+		return __ib_destroy_shared_qp(qp);
+
+	sec  = qp->qp_sec;
+	if (sec)
+		ib_destroy_qp_security_begin(sec);
+
+	if (!qp->uobject)
+		rdma_rw_cleanup_mrs(qp);
+
+	rdma_counter_unbind_qp(qp, true);
+	ret = qp->device->ops.destroy_qp(qp, udata);
+	if (ret) {
+		if (sec)
+			ib_destroy_qp_security_abort(sec);
+		return ret;
+	}
+
+	if (alt_path_sgid_attr)
+		rdma_put_gid_attr(alt_path_sgid_attr);
+	if (av_sgid_attr)
+		rdma_put_gid_attr(av_sgid_attr);
+
+	ib_qp_usecnt_dec(qp);
+	if (sec)
+		ib_destroy_qp_security_end(sec);
+
+	rdma_restrack_del(&qp->res);
+	kfree(qp);
+	return ret;
+}
+EXPORT_SYMBOL(ib_destroy_qp_user);
+
+/* Completion queues */
+
+struct ib_cq *__ib_create_cq(struct ib_device *device,
+			     ib_comp_handler comp_handler,
+			     void (*event_handler)(struct ib_event *, void *),
+			     void *cq_context,
+			     const struct ib_cq_init_attr *cq_attr,
+			     const char *caller)
+{
+	struct ib_cq *cq;
+	int ret;
+
+	cq = rdma_zalloc_drv_obj(device, ib_cq);
+	if (!cq)
+		return ERR_PTR(-ENOMEM);
+
+	cq->device = device;
+	cq->uobject = NULL;
+	cq->comp_handler = comp_handler;
+	cq->event_handler = event_handler;
+	cq->cq_context = cq_context;
+	atomic_set(&cq->usecnt, 0);
+
+	rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
+	rdma_restrack_set_name(&cq->res, caller);
+
+	ret = device->ops.create_cq(cq, cq_attr, NULL);
+	if (ret) {
+		rdma_restrack_put(&cq->res);
+		kfree(cq);
+		return ERR_PTR(ret);
+	}
+
+	rdma_restrack_add(&cq->res);
+	return cq;
+}
+EXPORT_SYMBOL(__ib_create_cq);
+
+int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
+{
+	if (cq->shared)
+		return -EOPNOTSUPP;
+
+	return cq->device->ops.modify_cq ?
+		cq->device->ops.modify_cq(cq, cq_count,
+					  cq_period) : -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(rdma_set_cq_moderation);
+
+int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
+{
+	int ret;
+
+	if (WARN_ON_ONCE(cq->shared))
+		return -EOPNOTSUPP;
+
+	if (atomic_read(&cq->usecnt))
+		return -EBUSY;
+
+	ret = cq->device->ops.destroy_cq(cq, udata);
+	if (ret)
+		return ret;
+
+	rdma_restrack_del(&cq->res);
+	kfree(cq);
+	return ret;
+}
+EXPORT_SYMBOL(ib_destroy_cq_user);
+
+int ib_resize_cq(struct ib_cq *cq, int cqe)
+{
+	if (cq->shared)
+		return -EOPNOTSUPP;
+
+	return cq->device->ops.resize_cq ?
+		cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(ib_resize_cq);
+
+/* Memory regions */
+
+struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+			     u64 virt_addr, int access_flags)
+{
+	struct ib_mr *mr;
+
+	if (access_flags & IB_ACCESS_ON_DEMAND) {
+		if (!(pd->device->attrs.kernel_cap_flags &
+		      IBK_ON_DEMAND_PAGING)) {
+			pr_debug("ODP support not available\n");
+			return ERR_PTR(-EINVAL);
+		}
+	}
+
+	mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr,
+					 access_flags, NULL);
+
+	if (IS_ERR(mr))
+		return mr;
+
+	mr->device = pd->device;
+	mr->type = IB_MR_TYPE_USER;
+	mr->pd = pd;
+	mr->dm = NULL;
+	atomic_inc(&pd->usecnt);
+	mr->iova =  virt_addr;
+	mr->length = length;
+
+	rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
+	rdma_restrack_parent_name(&mr->res, &pd->res);
+	rdma_restrack_add(&mr->res);
+
+	return mr;
+}
+EXPORT_SYMBOL(ib_reg_user_mr);
+
+int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
+		 u32 flags, struct ib_sge *sg_list, u32 num_sge)
+{
+	if (!pd->device->ops.advise_mr)
+		return -EOPNOTSUPP;
+
+	if (!num_sge)
+		return 0;
+
+	return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
+					 NULL);
+}
+EXPORT_SYMBOL(ib_advise_mr);
+
+int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
+{
+	struct ib_pd *pd = mr->pd;
+	struct ib_dm *dm = mr->dm;
+	struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
+	int ret;
+
+	trace_mr_dereg(mr);
+	rdma_restrack_del(&mr->res);
+	ret = mr->device->ops.dereg_mr(mr, udata);
+	if (!ret) {
+		atomic_dec(&pd->usecnt);
+		if (dm)
+			atomic_dec(&dm->usecnt);
+		kfree(sig_attrs);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(ib_dereg_mr_user);
+
+/**
+ * ib_alloc_mr() - Allocates a memory region
+ * @pd:            protection domain associated with the region
+ * @mr_type:       memory region type
+ * @max_num_sg:    maximum sg entries available for registration.
+ *
+ * Notes:
+ * Memory registeration page/sg lists must not exceed max_num_sg.
+ * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
+ * max_num_sg * used_page_size.
+ *
+ */
+struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
+			  u32 max_num_sg)
+{
+	struct ib_mr *mr;
+
+	if (!pd->device->ops.alloc_mr) {
+		mr = ERR_PTR(-EOPNOTSUPP);
+		goto out;
+	}
+
+	if (mr_type == IB_MR_TYPE_INTEGRITY) {
+		WARN_ON_ONCE(1);
+		mr = ERR_PTR(-EINVAL);
+		goto out;
+	}
+
+	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg);
+	if (IS_ERR(mr))
+		goto out;
+
+	mr->device = pd->device;
+	mr->pd = pd;
+	mr->dm = NULL;
+	mr->uobject = NULL;
+	atomic_inc(&pd->usecnt);
+	mr->need_inval = false;
+	mr->type = mr_type;
+	mr->sig_attrs = NULL;
+
+	rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
+	rdma_restrack_parent_name(&mr->res, &pd->res);
+	rdma_restrack_add(&mr->res);
+out:
+	trace_mr_alloc(pd, mr_type, max_num_sg, mr);
+	return mr;
+}
+EXPORT_SYMBOL(ib_alloc_mr);
+
+/**
+ * ib_alloc_mr_integrity() - Allocates an integrity memory region
+ * @pd:                      protection domain associated with the region
+ * @max_num_data_sg:         maximum data sg entries available for registration
+ * @max_num_meta_sg:         maximum metadata sg entries available for
+ *                           registration
+ *
+ * Notes:
+ * Memory registration page/sg lists must not exceed max_num_sg,
+ * also the integrity page/sg lists must not exceed max_num_meta_sg.
+ *
+ */
+struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
+				    u32 max_num_data_sg,
+				    u32 max_num_meta_sg)
+{
+	struct ib_mr *mr;
+	struct ib_sig_attrs *sig_attrs;
+
+	if (!pd->device->ops.alloc_mr_integrity ||
+	    !pd->device->ops.map_mr_sg_pi) {
+		mr = ERR_PTR(-EOPNOTSUPP);
+		goto out;
+	}
+
+	if (!max_num_meta_sg) {
+		mr = ERR_PTR(-EINVAL);
+		goto out;
+	}
+
+	sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);
+	if (!sig_attrs) {
+		mr = ERR_PTR(-ENOMEM);
+		goto out;
+	}
+
+	mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
+						max_num_meta_sg);
+	if (IS_ERR(mr)) {
+		kfree(sig_attrs);
+		goto out;
+	}
+
+	mr->device = pd->device;
+	mr->pd = pd;
+	mr->dm = NULL;
+	mr->uobject = NULL;
+	atomic_inc(&pd->usecnt);
+	mr->need_inval = false;
+	mr->type = IB_MR_TYPE_INTEGRITY;
+	mr->sig_attrs = sig_attrs;
+
+	rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
+	rdma_restrack_parent_name(&mr->res, &pd->res);
+	rdma_restrack_add(&mr->res);
+out:
+	trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr);
+	return mr;
+}
+EXPORT_SYMBOL(ib_alloc_mr_integrity);
+
+/* Multicast groups */
+
+static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
+{
+	struct ib_qp_init_attr init_attr = {};
+	struct ib_qp_attr attr = {};
+	int num_eth_ports = 0;
+	unsigned int port;
+
+	/* If QP state >= init, it is assigned to a port and we can check this
+	 * port only.
+	 */
+	if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
+		if (attr.qp_state >= IB_QPS_INIT) {
+			if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
+			    IB_LINK_LAYER_INFINIBAND)
+				return true;
+			goto lid_check;
+		}
+	}
+
+	/* Can't get a quick answer, iterate over all ports */
+	rdma_for_each_port(qp->device, port)
+		if (rdma_port_get_link_layer(qp->device, port) !=
+		    IB_LINK_LAYER_INFINIBAND)
+			num_eth_ports++;
+
+	/* If we have at lease one Ethernet port, RoCE annex declares that
+	 * multicast LID should be ignored. We can't tell at this step if the
+	 * QP belongs to an IB or Ethernet port.
+	 */
+	if (num_eth_ports)
+		return true;
+
+	/* If all the ports are IB, we can check according to IB spec. */
+lid_check:
+	return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+		 lid == be16_to_cpu(IB_LID_PERMISSIVE));
+}
+
+int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
+{
+	int ret;
+
+	if (!qp->device->ops.attach_mcast)
+		return -EOPNOTSUPP;
+
+	if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
+	    qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
+		return -EINVAL;
+
+	ret = qp->device->ops.attach_mcast(qp, gid, lid);
+	if (!ret)
+		atomic_inc(&qp->usecnt);
+	return ret;
+}
+EXPORT_SYMBOL(ib_attach_mcast);
+
+int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
+{
+	int ret;
+
+	if (!qp->device->ops.detach_mcast)
+		return -EOPNOTSUPP;
+
+	if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
+	    qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
+		return -EINVAL;
+
+	ret = qp->device->ops.detach_mcast(qp, gid, lid);
+	if (!ret)
+		atomic_dec(&qp->usecnt);
+	return ret;
+}
+EXPORT_SYMBOL(ib_detach_mcast);
+
+/**
+ * ib_alloc_xrcd_user - Allocates an XRC domain.
+ * @device: The device on which to allocate the XRC domain.
+ * @inode: inode to connect XRCD
+ * @udata: Valid user data or NULL for kernel object
+ */
+struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,
+				   struct inode *inode, struct ib_udata *udata)
+{
+	struct ib_xrcd *xrcd;
+	int ret;
+
+	if (!device->ops.alloc_xrcd)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	xrcd = rdma_zalloc_drv_obj(device, ib_xrcd);
+	if (!xrcd)
+		return ERR_PTR(-ENOMEM);
+
+	xrcd->device = device;
+	xrcd->inode = inode;
+	atomic_set(&xrcd->usecnt, 0);
+	init_rwsem(&xrcd->tgt_qps_rwsem);
+	xa_init(&xrcd->tgt_qps);
+
+	ret = device->ops.alloc_xrcd(xrcd, udata);
+	if (ret)
+		goto err;
+	return xrcd;
+err:
+	kfree(xrcd);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(ib_alloc_xrcd_user);
+
+/**
+ * ib_dealloc_xrcd_user - Deallocates an XRC domain.
+ * @xrcd: The XRC domain to deallocate.
+ * @udata: Valid user data or NULL for kernel object
+ */
+int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata)
+{
+	int ret;
+
+	if (atomic_read(&xrcd->usecnt))
+		return -EBUSY;
+
+	WARN_ON(!xa_empty(&xrcd->tgt_qps));
+	ret = xrcd->device->ops.dealloc_xrcd(xrcd, udata);
+	if (ret)
+		return ret;
+	kfree(xrcd);
+	return ret;
+}
+EXPORT_SYMBOL(ib_dealloc_xrcd_user);
+
+/**
+ * ib_create_wq - Creates a WQ associated with the specified protection
+ * domain.
+ * @pd: The protection domain associated with the WQ.
+ * @wq_attr: A list of initial attributes required to create the
+ * WQ. If WQ creation succeeds, then the attributes are updated to
+ * the actual capabilities of the created WQ.
+ *
+ * wq_attr->max_wr and wq_attr->max_sge determine
+ * the requested size of the WQ, and set to the actual values allocated
+ * on return.
+ * If ib_create_wq() succeeds, then max_wr and max_sge will always be
+ * at least as large as the requested values.
+ */
+struct ib_wq *ib_create_wq(struct ib_pd *pd,
+			   struct ib_wq_init_attr *wq_attr)
+{
+	struct ib_wq *wq;
+
+	if (!pd->device->ops.create_wq)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	wq = pd->device->ops.create_wq(pd, wq_attr, NULL);
+	if (!IS_ERR(wq)) {
+		wq->event_handler = wq_attr->event_handler;
+		wq->wq_context = wq_attr->wq_context;
+		wq->wq_type = wq_attr->wq_type;
+		wq->cq = wq_attr->cq;
+		wq->device = pd->device;
+		wq->pd = pd;
+		wq->uobject = NULL;
+		atomic_inc(&pd->usecnt);
+		atomic_inc(&wq_attr->cq->usecnt);
+		atomic_set(&wq->usecnt, 0);
+	}
+	return wq;
+}
+EXPORT_SYMBOL(ib_create_wq);
+
+/**
+ * ib_destroy_wq_user - Destroys the specified user WQ.
+ * @wq: The WQ to destroy.
+ * @udata: Valid user data
+ */
+int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata)
+{
+	struct ib_cq *cq = wq->cq;
+	struct ib_pd *pd = wq->pd;
+	int ret;
+
+	if (atomic_read(&wq->usecnt))
+		return -EBUSY;
+
+	ret = wq->device->ops.destroy_wq(wq, udata);
+	if (ret)
+		return ret;
+
+	atomic_dec(&pd->usecnt);
+	atomic_dec(&cq->usecnt);
+	return ret;
+}
+EXPORT_SYMBOL(ib_destroy_wq_user);
+
+int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
+		       struct ib_mr_status *mr_status)
+{
+	if (!mr->device->ops.check_mr_status)
+		return -EOPNOTSUPP;
+
+	return mr->device->ops.check_mr_status(mr, check_mask, mr_status);
+}
+EXPORT_SYMBOL(ib_check_mr_status);
+
+int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port,
+			 int state)
+{
+	if (!device->ops.set_vf_link_state)
+		return -EOPNOTSUPP;
+
+	return device->ops.set_vf_link_state(device, vf, port, state);
+}
+EXPORT_SYMBOL(ib_set_vf_link_state);
+
+int ib_get_vf_config(struct ib_device *device, int vf, u32 port,
+		     struct ifla_vf_info *info)
+{
+	if (!device->ops.get_vf_config)
+		return -EOPNOTSUPP;
+
+	return device->ops.get_vf_config(device, vf, port, info);
+}
+EXPORT_SYMBOL(ib_get_vf_config);
+
+int ib_get_vf_stats(struct ib_device *device, int vf, u32 port,
+		    struct ifla_vf_stats *stats)
+{
+	if (!device->ops.get_vf_stats)
+		return -EOPNOTSUPP;
+
+	return device->ops.get_vf_stats(device, vf, port, stats);
+}
+EXPORT_SYMBOL(ib_get_vf_stats);
+
+int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid,
+		   int type)
+{
+	if (!device->ops.set_vf_guid)
+		return -EOPNOTSUPP;
+
+	return device->ops.set_vf_guid(device, vf, port, guid, type);
+}
+EXPORT_SYMBOL(ib_set_vf_guid);
+
+int ib_get_vf_guid(struct ib_device *device, int vf, u32 port,
+		   struct ifla_vf_guid *node_guid,
+		   struct ifla_vf_guid *port_guid)
+{
+	if (!device->ops.get_vf_guid)
+		return -EOPNOTSUPP;
+
+	return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid);
+}
+EXPORT_SYMBOL(ib_get_vf_guid);
+/**
+ * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection
+ *     information) and set an appropriate memory region for registration.
+ * @mr:             memory region
+ * @data_sg:        dma mapped scatterlist for data
+ * @data_sg_nents:  number of entries in data_sg
+ * @data_sg_offset: offset in bytes into data_sg
+ * @meta_sg:        dma mapped scatterlist for metadata
+ * @meta_sg_nents:  number of entries in meta_sg
+ * @meta_sg_offset: offset in bytes into meta_sg
+ * @page_size:      page vector desired page size
+ *
+ * Constraints:
+ * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY.
+ *
+ * Return: 0 on success.
+ *
+ * After this completes successfully, the  memory region
+ * is ready for registration.
+ */
+int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,
+		    int data_sg_nents, unsigned int *data_sg_offset,
+		    struct scatterlist *meta_sg, int meta_sg_nents,
+		    unsigned int *meta_sg_offset, unsigned int page_size)
+{
+	if (unlikely(!mr->device->ops.map_mr_sg_pi ||
+		     WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY)))
+		return -EOPNOTSUPP;
+
+	mr->page_size = page_size;
+
+	return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents,
+					    data_sg_offset, meta_sg,
+					    meta_sg_nents, meta_sg_offset);
+}
+EXPORT_SYMBOL(ib_map_mr_sg_pi);
+
+/**
+ * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
+ *     and set it the memory region.
+ * @mr:            memory region
+ * @sg:            dma mapped scatterlist
+ * @sg_nents:      number of entries in sg
+ * @sg_offset:     offset in bytes into sg
+ * @page_size:     page vector desired page size
+ *
+ * Constraints:
+ *
+ * - The first sg element is allowed to have an offset.
+ * - Each sg element must either be aligned to page_size or virtually
+ *   contiguous to the previous element. In case an sg element has a
+ *   non-contiguous offset, the mapping prefix will not include it.
+ * - The last sg element is allowed to have length less than page_size.
+ * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
+ *   then only max_num_sg entries will be mapped.
+ * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
+ *   constraints holds and the page_size argument is ignored.
+ *
+ * Returns the number of sg elements that were mapped to the memory region.
+ *
+ * After this completes successfully, the  memory region
+ * is ready for registration.
+ */
+int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
+		 unsigned int *sg_offset, unsigned int page_size)
+{
+	if (unlikely(!mr->device->ops.map_mr_sg))
+		return -EOPNOTSUPP;
+
+	mr->page_size = page_size;
+
+	return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset);
+}
+EXPORT_SYMBOL(ib_map_mr_sg);
+
+/**
+ * ib_sg_to_pages() - Convert the largest prefix of a sg list
+ *     to a page vector
+ * @mr:            memory region
+ * @sgl:           dma mapped scatterlist
+ * @sg_nents:      number of entries in sg
+ * @sg_offset_p:   ==== =======================================================
+ *                 IN   start offset in bytes into sg
+ *                 OUT  offset in bytes for element n of the sg of the first
+ *                      byte that has not been processed where n is the return
+ *                      value of this function.
+ *                 ==== =======================================================
+ * @set_page:      driver page assignment function pointer
+ *
+ * Core service helper for drivers to convert the largest
+ * prefix of given sg list to a page vector. The sg list
+ * prefix converted is the prefix that meet the requirements
+ * of ib_map_mr_sg.
+ *
+ * Returns the number of sg elements that were assigned to
+ * a page vector.
+ */
+int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
+		unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
+{
+	struct scatterlist *sg;
+	u64 last_end_dma_addr = 0;
+	unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
+	unsigned int last_page_off = 0;
+	u64 page_mask = ~((u64)mr->page_size - 1);
+	int i, ret;
+
+	if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
+		return -EINVAL;
+
+	mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
+	mr->length = 0;
+
+	for_each_sg(sgl, sg, sg_nents, i) {
+		u64 dma_addr = sg_dma_address(sg) + sg_offset;
+		u64 prev_addr = dma_addr;
+		unsigned int dma_len = sg_dma_len(sg) - sg_offset;
+		u64 end_dma_addr = dma_addr + dma_len;
+		u64 page_addr = dma_addr & page_mask;
+
+		/*
+		 * For the second and later elements, check whether either the
+		 * end of element i-1 or the start of element i is not aligned
+		 * on a page boundary.
+		 */
+		if (i && (last_page_off != 0 || page_addr != dma_addr)) {
+			/* Stop mapping if there is a gap. */
+			if (last_end_dma_addr != dma_addr)
+				break;
+
+			/*
+			 * Coalesce this element with the last. If it is small
+			 * enough just update mr->length. Otherwise start
+			 * mapping from the next page.
+			 */
+			goto next_page;
+		}
+
+		do {
+			ret = set_page(mr, page_addr);
+			if (unlikely(ret < 0)) {
+				sg_offset = prev_addr - sg_dma_address(sg);
+				mr->length += prev_addr - dma_addr;
+				if (sg_offset_p)
+					*sg_offset_p = sg_offset;
+				return i || sg_offset ? i : ret;
+			}
+			prev_addr = page_addr;
+next_page:
+			page_addr += mr->page_size;
+		} while (page_addr < end_dma_addr);
+
+		mr->length += dma_len;
+		last_end_dma_addr = end_dma_addr;
+		last_page_off = end_dma_addr & ~page_mask;
+
+		sg_offset = 0;
+	}
+
+	if (sg_offset_p)
+		*sg_offset_p = 0;
+	return i;
+}
+EXPORT_SYMBOL(ib_sg_to_pages);
+
+struct ib_drain_cqe {
+	struct ib_cqe cqe;
+	struct completion done;
+};
+
+static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+	struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
+						cqe);
+
+	complete(&cqe->done);
+}
+
+/*
+ * Post a WR and block until its completion is reaped for the SQ.
+ */
+static void __ib_drain_sq(struct ib_qp *qp)
+{
+	struct ib_cq *cq = qp->send_cq;
+	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
+	struct ib_drain_cqe sdrain;
+	struct ib_rdma_wr swr = {
+		.wr = {
+			.next = NULL,
+			{ .wr_cqe	= &sdrain.cqe, },
+			.opcode	= IB_WR_RDMA_WRITE,
+		},
+	};
+	int ret;
+
+	ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
+	if (ret) {
+		WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
+		return;
+	}
+
+	sdrain.cqe.done = ib_drain_qp_done;
+	init_completion(&sdrain.done);
+
+	ret = ib_post_send(qp, &swr.wr, NULL);
+	if (ret) {
+		WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
+		return;
+	}
+
+	if (cq->poll_ctx == IB_POLL_DIRECT)
+		while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
+			ib_process_cq_direct(cq, -1);
+	else
+		wait_for_completion(&sdrain.done);
+}
+
+/*
+ * Post a WR and block until its completion is reaped for the RQ.
+ */
+static void __ib_drain_rq(struct ib_qp *qp)
+{
+	struct ib_cq *cq = qp->recv_cq;
+	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
+	struct ib_drain_cqe rdrain;
+	struct ib_recv_wr rwr = {};
+	int ret;
+
+	ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
+	if (ret) {
+		WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
+		return;
+	}
+
+	rwr.wr_cqe = &rdrain.cqe;
+	rdrain.cqe.done = ib_drain_qp_done;
+	init_completion(&rdrain.done);
+
+	ret = ib_post_recv(qp, &rwr, NULL);
+	if (ret) {
+		WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
+		return;
+	}
+
+	if (cq->poll_ctx == IB_POLL_DIRECT)
+		while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
+			ib_process_cq_direct(cq, -1);
+	else
+		wait_for_completion(&rdrain.done);
+}
+
+/**
+ * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
+ *		   application.
+ * @qp:            queue pair to drain
+ *
+ * If the device has a provider-specific drain function, then
+ * call that.  Otherwise call the generic drain function
+ * __ib_drain_sq().
+ *
+ * The caller must:
+ *
+ * ensure there is room in the CQ and SQ for the drain work request and
+ * completion.
+ *
+ * allocate the CQ using ib_alloc_cq().
+ *
+ * ensure that there are no other contexts that are posting WRs concurrently.
+ * Otherwise the drain is not guaranteed.
+ */
+void ib_drain_sq(struct ib_qp *qp)
+{
+	if (qp->device->ops.drain_sq)
+		qp->device->ops.drain_sq(qp);
+	else
+		__ib_drain_sq(qp);
+	trace_cq_drain_complete(qp->send_cq);
+}
+EXPORT_SYMBOL(ib_drain_sq);
+
+/**
+ * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
+ *		   application.
+ * @qp:            queue pair to drain
+ *
+ * If the device has a provider-specific drain function, then
+ * call that.  Otherwise call the generic drain function
+ * __ib_drain_rq().
+ *
+ * The caller must:
+ *
+ * ensure there is room in the CQ and RQ for the drain work request and
+ * completion.
+ *
+ * allocate the CQ using ib_alloc_cq().
+ *
+ * ensure that there are no other contexts that are posting WRs concurrently.
+ * Otherwise the drain is not guaranteed.
+ */
+void ib_drain_rq(struct ib_qp *qp)
+{
+	if (qp->device->ops.drain_rq)
+		qp->device->ops.drain_rq(qp);
+	else
+		__ib_drain_rq(qp);
+	trace_cq_drain_complete(qp->recv_cq);
+}
+EXPORT_SYMBOL(ib_drain_rq);
+
+/**
+ * ib_drain_qp() - Block until all CQEs have been consumed by the
+ *		   application on both the RQ and SQ.
+ * @qp:            queue pair to drain
+ *
+ * The caller must:
+ *
+ * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
+ * and completions.
+ *
+ * allocate the CQs using ib_alloc_cq().
+ *
+ * ensure that there are no other contexts that are posting WRs concurrently.
+ * Otherwise the drain is not guaranteed.
+ */
+void ib_drain_qp(struct ib_qp *qp)
+{
+	ib_drain_sq(qp);
+	if (!qp->srq)
+		ib_drain_rq(qp);
+}
+EXPORT_SYMBOL(ib_drain_qp);
+
+struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num,
+				     enum rdma_netdev_t type, const char *name,
+				     unsigned char name_assign_type,
+				     void (*setup)(struct net_device *))
+{
+	struct rdma_netdev_alloc_params params;
+	struct net_device *netdev;
+	int rc;
+
+	if (!device->ops.rdma_netdev_get_params)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	rc = device->ops.rdma_netdev_get_params(device, port_num, type,
+						&params);
+	if (rc)
+		return ERR_PTR(rc);
+
+	netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type,
+				  setup, params.txqs, params.rxqs);
+	if (!netdev)
+		return ERR_PTR(-ENOMEM);
+
+	return netdev;
+}
+EXPORT_SYMBOL(rdma_alloc_netdev);
+
+int rdma_init_netdev(struct ib_device *device, u32 port_num,
+		     enum rdma_netdev_t type, const char *name,
+		     unsigned char name_assign_type,
+		     void (*setup)(struct net_device *),
+		     struct net_device *netdev)
+{
+	struct rdma_netdev_alloc_params params;
+	int rc;
+
+	if (!device->ops.rdma_netdev_get_params)
+		return -EOPNOTSUPP;
+
+	rc = device->ops.rdma_netdev_get_params(device, port_num, type,
+						&params);
+	if (rc)
+		return rc;
+
+	return params.initialize_rdma_netdev(device, port_num,
+					     netdev, params.param);
+}
+EXPORT_SYMBOL(rdma_init_netdev);
+
+void __rdma_block_iter_start(struct ib_block_iter *biter,
+			     struct scatterlist *sglist, unsigned int nents,
+			     unsigned long pgsz)
+{
+	memset(biter, 0, sizeof(struct ib_block_iter));
+	biter->__sg = sglist;
+	biter->__sg_nents = nents;
+
+	/* Driver provides best block size to use */
+	biter->__pg_bit = __fls(pgsz);
+}
+EXPORT_SYMBOL(__rdma_block_iter_start);
+
+bool __rdma_block_iter_next(struct ib_block_iter *biter)
+{
+	unsigned int block_offset;
+	unsigned int sg_delta;
+
+	if (!biter->__sg_nents || !biter->__sg)
+		return false;
+
+	biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance;
+	block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1);
+	sg_delta = BIT_ULL(biter->__pg_bit) - block_offset;
+
+	if (sg_dma_len(biter->__sg) - biter->__sg_advance > sg_delta) {
+		biter->__sg_advance += sg_delta;
+	} else {
+		biter->__sg_advance = 0;
+		biter->__sg = sg_next(biter->__sg);
+		biter->__sg_nents--;
+	}
+
+	return true;
+}
+EXPORT_SYMBOL(__rdma_block_iter_next);
+
+/**
+ * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct
+ *   for the drivers.
+ * @descs: array of static descriptors
+ * @num_counters: number of elements in array
+ * @lifespan: milliseconds between updates
+ */
+struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
+	const struct rdma_stat_desc *descs, int num_counters,
+	unsigned long lifespan)
+{
+	struct rdma_hw_stats *stats;
+
+	stats = kzalloc(struct_size(stats, value, num_counters), GFP_KERNEL);
+	if (!stats)
+		return NULL;
+
+	stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters),
+				     sizeof(*stats->is_disabled), GFP_KERNEL);
+	if (!stats->is_disabled)
+		goto err;
+
+	stats->descs = descs;
+	stats->num_counters = num_counters;
+	stats->lifespan = msecs_to_jiffies(lifespan);
+	mutex_init(&stats->lock);
+
+	return stats;
+
+err:
+	kfree(stats);
+	return NULL;
+}
+EXPORT_SYMBOL(rdma_alloc_hw_stats_struct);
+
+/**
+ * rdma_free_hw_stats_struct - Helper function to release rdma_hw_stats
+ * @stats: statistics to release
+ */
+void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats)
+{
+	if (!stats)
+		return;
+
+	kfree(stats->is_disabled);
+	kfree(stats);
+}
+EXPORT_SYMBOL(rdma_free_hw_stats_struct);