/*
 * Copyright (c) 2015-2019 Cray Inc. All rights reserved.
 * Copyright (c) 2015-2018 Los Alamos National Security, LLC.
 *                         All rights reserved.
 * Copyright (c) 2019 Triad National Security, LLC. 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
 * 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.
 */

/*
 * Endpoint common code
 */
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include "gnix.h"
#include "gnix_cm_nic.h"
#include "gnix_nic.h"
#include "gnix_util.h"
#include "gnix_ep.h"
#include "gnix_hashtable.h"
#include "gnix_vc.h"
#include "gnix_vector.h"
#include "gnix_msg.h"
#include "gnix_rma.h"
#include "gnix_atomic.h"
#include "gnix_cntr.h"
#include "gnix_xpmem.h"
#include "gnix_eq.h"
#include "gnix_cm.h"
#include "gnix_auth_key.h"

/*******************************************************************************
 * gnix_fab_req freelist functions
 *
 * These are wrappers around the gnix_freelist
 *
 ******************************************************************************/

#define GNIX_FAB_REQ_FL_MIN_SIZE 100
#define GNIX_FAB_REQ_FL_REFILL_SIZE 10

int _gnix_ep_int_tx_pool_grow(struct gnix_fid_ep *ep)
{
	int ret, i;
	uint8_t *tx_bufs;
	struct fid_mr *auto_mr = NULL;
	struct gnix_fid_mem_desc *md = NULL;
	struct gnix_int_tx_buf *tx_buf_list;
	struct gnix_int_tx_ptrs *tx_ptrs;
	
	assert(ep);

	if (ep->int_tx_pool.nbufs >= GNIX_INT_TX_POOL_COUNT) {
		GNIX_WARN(FI_LOG_EP_DATA, "int_tx_pool is at max size\n");
		return -FI_ENOSPC;
	}

	tx_bufs = malloc(GNIX_INT_TX_POOL_SIZE * GNIX_INT_TX_BUF_SZ);
	if (tx_bufs == NULL) {
		GNIX_WARN(FI_LOG_EP_DATA, "tx_bufs allocation failed\n");
		goto tx_buf_err;
	}

	tx_buf_list = malloc(GNIX_INT_TX_POOL_SIZE *
				 sizeof(struct gnix_int_tx_buf));
	if (tx_buf_list == NULL) {
		GNIX_WARN(FI_LOG_EP_DATA, "tx_bufs_list allocation failed\n");
		goto tx_buf_list_err;
	}

	tx_ptrs = malloc(sizeof(struct gnix_int_tx_ptrs));
	if (tx_buf_list == NULL) {
		GNIX_WARN(FI_LOG_EP_DATA, "tx_ptrs allocation failed\n");
		goto tx_ptrs_err;
	}

	ret = _gnix_mr_reg(&ep->domain->domain_fid.fid, tx_bufs,
			GNIX_INT_TX_BUF_SZ * GNIX_INT_TX_POOL_SIZE,
			FI_READ | FI_WRITE, 0, 0, 0,
			&auto_mr, NULL, ep->auth_key, GNIX_PROV_REG);

	if (OFI_UNLIKELY(ret != FI_SUCCESS)) {
		GNIX_WARN(FI_LOG_EP_DATA, "gnix_mr_req returned: %s\n",
			   fi_strerror(-ret));
		goto reg_err;
	}

	md = container_of(auto_mr, struct gnix_fid_mem_desc, mr_fid);

	fastlock_acquire(&ep->int_tx_pool.lock);

	for (i = 0; i < GNIX_INT_TX_POOL_SIZE; i++) {
		GNIX_DEBUG(FI_LOG_EP_DATA,
			"tx_bufs + (%d * GNIX_INT_TX_BUF_SZ) = %p\n",
			i, tx_bufs + (i * GNIX_INT_TX_BUF_SZ));
		tx_buf_list[i].buf = tx_bufs + (i * GNIX_INT_TX_BUF_SZ);
		tx_buf_list[i].md = md;
		slist_insert_tail(&tx_buf_list[i].e, &ep->int_tx_pool.sl);
	}

	tx_ptrs->md = md;
	tx_ptrs->buf_ptr = (void *) tx_bufs;
	tx_ptrs->sl_ptr = (void *) tx_buf_list;
	slist_insert_tail(&tx_ptrs->e, &ep->int_tx_pool.bl);

	ep->int_tx_pool.nbufs++;

	fastlock_release(&ep->int_tx_pool.lock);

	return FI_SUCCESS;

reg_err:
	free(tx_ptrs);
tx_ptrs_err:
	free(tx_buf_list);
tx_buf_list_err:
	free(tx_bufs);
tx_buf_err:
	return -FI_ENOSPC;
}

int _gnix_ep_int_tx_pool_init(struct gnix_fid_ep *ep)
{
	int ret;

	assert(ep);

	ep->int_tx_pool.nbufs = 0;
	slist_init(&ep->int_tx_pool.sl);
	slist_init(&ep->int_tx_pool.bl);
	fastlock_init(&ep->int_tx_pool.lock);

	ret = _gnix_ep_int_tx_pool_grow(ep);
	if (ret != FI_SUCCESS)
		return ret;

	ep->int_tx_pool.enabled = true;

	return FI_SUCCESS;
}

void _gnix_ep_int_tx_pool_fini(struct gnix_fid_ep *ep)
{
	int ret;
	struct slist_entry *e;
	struct gnix_int_tx_ptrs *tx_ptrs;

	assert(ep);

	if (ep->int_tx_pool.enabled == false)
		return;

	fastlock_acquire(&ep->int_tx_pool.lock);

	while (!slist_empty(&ep->int_tx_pool.bl)) {
		e = slist_remove_head(&ep->int_tx_pool.bl);
		tx_ptrs = (struct gnix_int_tx_ptrs *)e;

		ret = fi_close(&tx_ptrs->md->mr_fid.fid);

		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_DATA, "fi_close returned: %s\n",
				   fi_strerror(-ret));
		}

		if (tx_ptrs->buf_ptr != NULL) {
			free(tx_ptrs->buf_ptr);
			tx_ptrs->buf_ptr = NULL;
		}

		if (tx_ptrs->sl_ptr != NULL) {
			free(tx_ptrs->sl_ptr);
			tx_ptrs->sl_ptr = NULL;
		}

		free(tx_ptrs);
		ep->int_tx_pool.nbufs--;
	}

	ep->int_tx_pool.enabled = false;

	fastlock_release(&ep->int_tx_pool.lock);
}

static int __fr_freelist_init(struct gnix_fid_ep *ep)
{
	int ret;

	assert(ep);
	ret = _gnix_fl_init_ts(sizeof(struct gnix_fab_req),
			       offsetof(struct gnix_fab_req, dlist),
			       GNIX_FAB_REQ_FL_MIN_SIZE,
			       GNIX_FAB_REQ_FL_REFILL_SIZE,
			       0, 0, &ep->fr_freelist);

	if (ret != FI_SUCCESS) {
		GNIX_DEBUG(FI_LOG_EP_DATA, "_gnix_fl_init_ts returned: %s\n",
			   fi_strerror(-ret));
		return ret;
	}

	return ret;
}

static void __fr_freelist_destroy(struct gnix_fid_ep *ep)
{
	assert(ep);

	_gnix_fl_destroy(&ep->fr_freelist);
}

int _gnix_ep_rx_enable(struct gnix_fid_ep *ep)
{
	if (ep->recv_cq) {
		_gnix_cq_poll_obj_add(ep->recv_cq, ep->nic,
				      _gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cq_poll_obj_add(ep->recv_cq, ep->cm_nic,
					      _gnix_cm_nic_progress);
		ep->rx_enabled = true;
	}

	if (ep->rwrite_cntr) {
		_gnix_cntr_poll_obj_add(ep->rwrite_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_add(ep->rwrite_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
	}

	if (ep->rread_cntr) {
		_gnix_cntr_poll_obj_add(ep->rread_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_add(ep->rread_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
	}

	return FI_SUCCESS;
}

int _gnix_ep_tx_enable(struct gnix_fid_ep *ep)
{

	if (ep->send_cq) {
		_gnix_cq_poll_obj_add(ep->send_cq, ep->nic,
				      _gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cq_poll_obj_add(ep->send_cq, ep->cm_nic,
					      _gnix_cm_nic_progress);
		ep->tx_enabled = true;
	}

	if (ep->send_cntr) {
		_gnix_cntr_poll_obj_add(ep->send_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_add(ep->send_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
	}

	if (ep->write_cntr) {
		_gnix_cntr_poll_obj_add(ep->write_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_add(ep->write_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
	}

	if (ep->read_cntr) {
		_gnix_cntr_poll_obj_add(ep->read_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_add(ep->read_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
	}

	return FI_SUCCESS;
}


/*******************************************************************************
 * Forward declaration for ops structures
 ******************************************************************************/

static struct fi_ops gnix_ep_fi_ops;
static struct fi_ops_ep gnix_ep_ops;
static struct fi_ops_msg gnix_ep_msg_ops;
static struct fi_ops_rma gnix_ep_rma_ops;
struct fi_ops_tagged gnix_ep_tagged_ops;
struct fi_ops_atomic gnix_ep_atomic_ops;

/*******************************************************************************
 * EP common messaging wrappers.
 ******************************************************************************/
ssize_t _ep_recv(struct fid_ep *ep, void *buf, size_t len,
		 void *desc, fi_addr_t src_addr, void *context,
		 uint64_t flags, uint64_t tag, uint64_t ignore)
{
	struct gnix_fid_ep *ep_priv;

	if (!ep) {
		return -FI_EINVAL;
	}

	ep_priv = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(ep_priv->type));

	if (!(ep_priv->op_flags & FI_MULTI_RECV)) {
		return _gnix_recv(ep_priv,
				  (uint64_t)buf,
				  len, desc,
				  src_addr,
				  context,
				  ep_priv->op_flags | flags,
				  tag,
				  ignore,
				  NULL);
	 } else {
		return _gnix_recv_mr(ep_priv,
				     (uint64_t)buf,
				     len,
				     desc,
				     src_addr,
				     context,
				     ep_priv->op_flags | flags,
				     tag,
				     ignore);
	}
}

ssize_t _ep_recvv(struct fid_ep *ep, const struct iovec *iov,
		  void **desc, size_t count, fi_addr_t src_addr,
		  void *context, uint64_t flags, uint64_t tag,
		  uint64_t ignore)
{
	struct gnix_fid_ep *ep_priv;

	if (!ep || !iov || count > GNIX_MAX_MSG_IOV_LIMIT) {
		return -FI_EINVAL;
	}

	ep_priv = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(ep_priv->type));

	if (count <= 1) {
		if (!(ep_priv->op_flags & FI_MULTI_RECV)) {
			return _gnix_recv(ep_priv,
					  (uint64_t)iov[0].iov_base,
					  iov[0].iov_len,
					  desc ? desc[0] : NULL,
					  src_addr,
					  context,
					  ep_priv->op_flags | flags,
					  tag,
					  ignore,
					  NULL);
		} else {
			return _gnix_recv_mr(ep_priv,
					  (uint64_t)iov[0].iov_base,
					  iov[0].iov_len,
					  desc ? desc[0] : NULL,
					  src_addr,
					  context,
					  ep_priv->op_flags | flags,
					  tag,
					  ignore);
		}
	}

	return _gnix_recvv(ep_priv, iov, desc, count, src_addr,
			   context, ep_priv->op_flags | flags, ignore, tag);
}

ssize_t _ep_recvmsg(struct fid_ep *ep, const struct fi_msg *msg,
		    uint64_t flags, uint64_t tag,
		    uint64_t ignore)
{
	struct iovec iov;
	struct gnix_fid_ep *ep_priv = container_of(ep, struct gnix_fid_ep, ep_fid);

	ep_priv = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(ep_priv->type));

	iov.iov_base = NULL;
	iov.iov_len = 0;

	if (!msg) {
		return -FI_EINVAL;
	}

	if (flags & FI_MULTI_RECV) {
		return _gnix_recv_mr(ep_priv,
				     (uint64_t)msg->msg_iov[0].iov_base,
				     msg->msg_iov[0].iov_len,
				     msg->desc ? msg->desc[0] : NULL,
				     msg->addr,
				     msg->context,
				     ep_priv->op_flags | flags,
				     tag,
				     ignore);
	}

	/* msg_iov can be undefined when using FI_PEEK, etc. */
	return _ep_recvv(ep, msg->msg_iov ? msg->msg_iov : &iov, msg->desc,
			 msg->iov_count, msg->addr, msg->context, flags, tag,
			 ignore);
}

ssize_t _ep_send(struct fid_ep *ep, const void *buf, size_t len,
		 void *desc, fi_addr_t dest_addr, void *context,
		 uint64_t flags, uint64_t tag)
{
	struct gnix_fid_ep *gnix_ep;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	return _gnix_send(gnix_ep, (uint64_t)buf, len, desc, dest_addr, context,
			  gnix_ep->op_flags | flags, 0, tag);
}

ssize_t _ep_sendv(struct fid_ep *ep, const struct iovec *iov,
		  void **desc, size_t count, fi_addr_t dest_addr,
		  void *context, uint64_t flags, uint64_t tag)
{
	struct gnix_fid_ep *gnix_ep;

	if (!ep || !iov || !count || count > GNIX_MAX_MSG_IOV_LIMIT) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	if (count == 1) {
		return _gnix_send(gnix_ep, (uint64_t)iov[0].iov_base,
				  iov[0].iov_len, desc ? desc[0] : NULL,
				  dest_addr, context, gnix_ep->op_flags | flags,
				  0, tag);
	}

	return _gnix_sendv(gnix_ep, iov, desc, count, dest_addr, context,
			   gnix_ep->op_flags | flags, tag);
}

ssize_t _ep_sendmsg(struct fid_ep *ep, const struct fi_msg *msg,
		     uint64_t flags, uint64_t tag)
{
	struct gnix_fid_ep *gnix_ep;

	if (!ep || !msg || !msg->msg_iov || !msg->iov_count) {
		return -FI_EINVAL;
	}

	/* Must check the iov count here, can't send msg->data to sendv */
	if (msg->iov_count > 1) {
		return _ep_sendv(ep, msg->msg_iov, msg->desc, msg->iov_count,
				 msg->addr, msg->context, flags, tag);
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	return _gnix_send(gnix_ep, (uint64_t)msg->msg_iov[0].iov_base,
			  msg->msg_iov[0].iov_len,
			  msg->desc ? msg->desc[0] : NULL, msg->addr,
			  msg->context, flags, msg->data, tag);
}

ssize_t _ep_inject(struct fid_ep *ep, const void *buf,
		   size_t len, uint64_t data, fi_addr_t dest_addr,
		   uint64_t flags, uint64_t tag)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t inject_flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	inject_flags = (gnix_ep->op_flags | FI_INJECT |
			GNIX_SUPPRESS_COMPLETION | flags);

	return _gnix_send(gnix_ep, (uint64_t)buf, len, NULL, dest_addr,
			  NULL, inject_flags, data, tag);
}

ssize_t _ep_senddata(struct fid_ep *ep, const void *buf,
		     size_t len, void *desc, uint64_t data,
		     fi_addr_t dest_addr, void *context,
		     uint64_t flags, uint64_t tag)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t sd_flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	sd_flags = gnix_ep->op_flags | FI_REMOTE_CQ_DATA | flags;

	return _gnix_send(gnix_ep, (uint64_t)buf, len, desc, dest_addr,
			  context, sd_flags, data, tag);
}

static void __gnix_vc_destroy_ht_entry(void *val)
{
	struct gnix_vc *vc = (struct gnix_vc *) val;

	_gnix_vc_destroy(vc);
}

/*******************************************************************************
 * EP vc initialization helper
 ******************************************************************************/

int _gnix_ep_init_vc(struct gnix_fid_ep *ep_priv)
{
	int ret;
	gnix_hashtable_attr_t gnix_ht_attr;
	gnix_vec_attr_t gnix_vec_attr;

	if (ep_priv->av == NULL) {
		GNIX_FATAL(FI_LOG_EP_CTRL,
			   "_gnix_ep_init_vc av field NULL\n");
	}

	if (ep_priv->av->type == FI_AV_TABLE) {
		/* Use array to store EP VCs when using FI_AV_TABLE. */
		ep_priv->vc_table = calloc(1, sizeof(struct gnix_vector));
		if(ep_priv->vc_table == NULL)
			return -FI_ENOMEM;

		gnix_vec_attr.vec_initial_size =
				ep_priv->domain->params.ct_init_size;
		/* TODO: ep_priv->domain->params.ct_max_size; */
		gnix_vec_attr.vec_maximum_size = 1024*1024;
		gnix_vec_attr.vec_increase_step = ep_priv->domain->params.ct_step;
		gnix_vec_attr.vec_increase_type = GNIX_VEC_INCREASE_MULT;
		gnix_vec_attr.vec_internal_locking = GNIX_VEC_UNLOCKED;

		ret = _gnix_vec_init(ep_priv->vc_table, &gnix_vec_attr);
		GNIX_DEBUG(FI_LOG_EP_CTRL,
			   "ep_priv->vc_table = %p, ep_priv->vc_table->vector = %p\n",
			   ep_priv->vc_table, ep_priv->vc_table->vector);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL, "_gnix_vec_init returned %s\n",
				  fi_strerror(ret));
			goto err;
		}
	} else {
		/* Use hash table to store EP VCs when using FI_AV_MAP. */
		ep_priv->vc_ht = calloc(1, sizeof(struct gnix_hashtable));
		if (ep_priv->vc_ht == NULL)
			return -FI_ENOMEM;

		gnix_ht_attr.ht_initial_size =
				ep_priv->domain->params.ct_init_size;
		gnix_ht_attr.ht_maximum_size =
				ep_priv->domain->params.ct_max_size;
		gnix_ht_attr.ht_increase_step = ep_priv->domain->params.ct_step;
		gnix_ht_attr.ht_increase_type = GNIX_HT_INCREASE_MULT;
		gnix_ht_attr.ht_collision_thresh = 500;
		gnix_ht_attr.ht_hash_seed = 0xdeadbeefbeefdead;
		gnix_ht_attr.ht_internal_locking = 0;
		gnix_ht_attr.destructor = __gnix_vc_destroy_ht_entry;

		ret = _gnix_ht_init(ep_priv->vc_ht, &gnix_ht_attr);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_ht_init returned %s\n",
				  fi_strerror(-ret));

			goto err;
		}
	}

	dlist_init(&ep_priv->unmapped_vcs);

	return FI_SUCCESS;

err:
	if (ep_priv->av->type == FI_AV_TABLE) {
		free(ep_priv->vc_table);
		ep_priv->vc_table = NULL;
	} else {
		free(ep_priv->vc_ht);
		ep_priv->vc_ht = NULL;
	}

	return ret;
}

static inline int __gnix_ep_fini_vc(struct gnix_fid_ep *ep)
{
	int ret;
	GNIX_VECTOR_ITERATOR(ep->vc_table, iter);
	struct gnix_vc *vc;

	/* Free unmapped VCs. */
	dlist_for_each(&ep->unmapped_vcs, vc, list) {
		_gnix_vc_destroy(vc);
	}

	if (!ep->av) {
		/* No AV bound, no mapped VCs clean up. */
		return FI_SUCCESS;
	}

	if (ep->av->type == FI_AV_TABLE) {
		/* Destroy all VCs */
		while ((vc = (struct gnix_vc *)
				_gnix_vec_iterator_next(&iter))) {
			_gnix_vec_remove_at(ep->vc_table,
					    GNIX_VECTOR_ITERATOR_IDX(iter));
			_gnix_vc_destroy(vc);
		}

		/* Destroy vector storage */
		ret = _gnix_vec_close(ep->vc_table);
		if (ret == FI_SUCCESS) {
			free(ep->vc_table);
			ep->vc_table = NULL;
		} else {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_vec_close returned %s\n",
				  fi_strerror(-ret));
		}
	} else {
		/* Destroy VC storage, it automatically tears down VCs */
		ret = _gnix_ht_destroy(ep->vc_ht);
		if (ret == FI_SUCCESS) {
			free(ep->vc_ht);
			ep->vc_ht = NULL;
		} else {
			GNIX_WARN(FI_LOG_EP_CTRL,
				"_gnix_ht_destroy returned %s\n",
				  fi_strerror(-ret));
		}
	}

	return FI_SUCCESS;
}

/*******************************************************************************
 * EP messaging API function implementations.
 ******************************************************************************/

DIRECT_FN STATIC ssize_t gnix_ep_recv(struct fid_ep *ep, void *buf, size_t len,
				      void *desc, fi_addr_t src_addr,
				      void *context)
{
	return _ep_recv(ep, buf, len, desc, src_addr, context, 0, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_recvv(struct fid_ep *ep,
				       const struct iovec *iov,
				       void **desc, size_t count,
				       fi_addr_t src_addr,
				       void *context)
{
	return _ep_recvv(ep, iov, desc, count, src_addr, context, 0, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_recvmsg(struct fid_ep *ep,
					 const struct fi_msg *msg,
					 uint64_t flags)
{
	return _ep_recvmsg(ep, msg, flags & GNIX_RECVMSG_FLAGS, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_send(struct fid_ep *ep, const void *buf,
				      size_t len, void *desc,
				      fi_addr_t dest_addr, void *context)
{
	return _ep_send(ep, buf, len, desc, dest_addr, context, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_sendv(struct fid_ep *ep,
				       const struct iovec *iov,
				       void **desc, size_t count,
				       fi_addr_t dest_addr,
				       void *context)
{
	return _ep_sendv(ep, iov, desc, count, dest_addr, context, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_sendmsg(struct fid_ep *ep,
					 const struct fi_msg *msg,
					 uint64_t flags)
{
	return _ep_sendmsg(ep, msg, flags & GNIX_SENDMSG_FLAGS, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_msg_inject(struct fid_ep *ep, const void *buf,
					    size_t len, fi_addr_t dest_addr)
{
	return _ep_inject(ep, buf, len, 0, dest_addr, 0, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_senddata(struct fid_ep *ep, const void *buf,
					  size_t len, void *desc, uint64_t data,
					  fi_addr_t dest_addr, void *context)
{
	return _ep_senddata(ep, buf, len, desc, data, dest_addr, context, 0, 0);
}

DIRECT_FN STATIC ssize_t
gnix_ep_msg_injectdata(struct fid_ep *ep, const void *buf, size_t len,
		       uint64_t data, fi_addr_t dest_addr)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | FI_INJECT | FI_REMOTE_CQ_DATA |
		GNIX_SUPPRESS_COMPLETION;

	return _gnix_send(gnix_ep, (uint64_t)buf, len, NULL, dest_addr,
			  NULL, flags, data, 0);
}

/*******************************************************************************
 * EP RMA API function implementations.
 ******************************************************************************/

DIRECT_FN STATIC ssize_t gnix_ep_read(struct fid_ep *ep, void *buf, size_t len,
				      void *desc, fi_addr_t src_addr, uint64_t addr,
				      uint64_t key, void *context)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | GNIX_RMA_READ_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_READ,
			 (uint64_t)buf, len, desc,
			 src_addr, addr, key,
			 context, flags, 0);
}

DIRECT_FN STATIC ssize_t
gnix_ep_readv(struct fid_ep *ep, const struct iovec *iov, void **desc,
	      size_t count, fi_addr_t src_addr, uint64_t addr, uint64_t key,
	      void *context)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep || !iov || !desc || count > GNIX_MAX_RMA_IOV_LIMIT) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | GNIX_RMA_READ_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_READ,
			 (uint64_t)iov[0].iov_base, iov[0].iov_len, desc[0],
			 src_addr, addr, key,
			 context, flags, 0);
}

DIRECT_FN STATIC ssize_t
gnix_ep_readmsg(struct fid_ep *ep, const struct fi_msg_rma *msg, uint64_t flags)
{
	struct gnix_fid_ep *gnix_ep;

	if (!ep || !msg || !msg->msg_iov || !msg->rma_iov || !msg->desc ||
	    msg->iov_count != 1 || msg->rma_iov_count != 1 ||
	    msg->rma_iov[0].len > msg->msg_iov[0].iov_len) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = (flags & GNIX_READMSG_FLAGS) | GNIX_RMA_READ_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_READ,
			 (uint64_t)msg->msg_iov[0].iov_base,
			 msg->msg_iov[0].iov_len, msg->desc[0],
			 msg->addr, msg->rma_iov[0].addr, msg->rma_iov[0].key,
			 msg->context, flags, msg->data);
}

DIRECT_FN STATIC ssize_t
gnix_ep_write(struct fid_ep *ep, const void *buf, size_t len, void *desc,
	      fi_addr_t dest_addr, uint64_t addr, uint64_t key, void *context)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)buf, len, desc, dest_addr, addr, key,
			 context, flags, 0);
}

DIRECT_FN STATIC ssize_t
gnix_ep_writev(struct fid_ep *ep, const struct iovec *iov, void **desc,
	       size_t count, fi_addr_t dest_addr, uint64_t addr, uint64_t key,
	       void *context)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep || !iov || !desc || count > GNIX_MAX_RMA_IOV_LIMIT) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)iov[0].iov_base, iov[0].iov_len, desc[0],
			 dest_addr, addr, key, context, flags, 0);
}

DIRECT_FN STATIC ssize_t gnix_ep_writemsg(struct fid_ep *ep, const struct fi_msg_rma *msg,
				uint64_t flags)
{
	struct gnix_fid_ep *gnix_ep;

	if (!ep || !msg || !msg->msg_iov || !msg->rma_iov ||
	    msg->iov_count != 1 ||
		msg->rma_iov_count > GNIX_MAX_RMA_IOV_LIMIT ||
	    msg->rma_iov[0].len > msg->msg_iov[0].iov_len) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = (flags & GNIX_WRITEMSG_FLAGS) | GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)msg->msg_iov[0].iov_base,
			 msg->msg_iov[0].iov_len, msg->desc ? msg->desc[0] : NULL,
			 msg->addr, msg->rma_iov[0].addr, msg->rma_iov[0].key,
			 msg->context, flags, msg->data);
}

DIRECT_FN STATIC ssize_t gnix_ep_rma_inject(struct fid_ep *ep, const void *buf,
					    size_t len, fi_addr_t dest_addr,
					    uint64_t addr, uint64_t key)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | FI_INJECT | GNIX_SUPPRESS_COMPLETION |
			GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)buf, len, NULL,
			 dest_addr, addr, key,
			 NULL, flags, 0);
}

DIRECT_FN STATIC ssize_t
gnix_ep_writedata(struct fid_ep *ep, const void *buf, size_t len, void *desc,
		  uint64_t data, fi_addr_t dest_addr, uint64_t addr,
		  uint64_t key, void *context)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | FI_REMOTE_CQ_DATA |
			GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)buf, len, desc,
			 dest_addr, addr, key,
			 context, flags, data);
}

DIRECT_FN STATIC ssize_t
gnix_ep_rma_injectdata(struct fid_ep *ep, const void *buf, size_t len,
		       uint64_t data, fi_addr_t dest_addr, uint64_t addr,
		       uint64_t key)
{
	struct gnix_fid_ep *gnix_ep;
	uint64_t flags;

	if (!ep) {
		return -FI_EINVAL;
	}

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = gnix_ep->op_flags | FI_INJECT | FI_REMOTE_CQ_DATA |
			GNIX_SUPPRESS_COMPLETION | GNIX_RMA_WRITE_FLAGS_DEF;

	return _gnix_rma(gnix_ep, GNIX_FAB_RQ_RDMA_WRITE,
			 (uint64_t)buf, len, NULL,
			 dest_addr, addr, key,
			 NULL, flags, data);
}

/*******************************************************************************
 * EP Tag matching API function implementations.
 ******************************************************************************/

DIRECT_FN STATIC ssize_t gnix_ep_trecv(struct fid_ep *ep, void *buf, size_t len,
				       void *desc, fi_addr_t src_addr,
				       uint64_t tag, uint64_t ignore,
				       void *context)
{
	return _ep_recv(ep, buf, len, desc, src_addr, context,
			FI_TAGGED, tag, ignore);
}

DIRECT_FN STATIC ssize_t gnix_ep_trecvv(struct fid_ep *ep,
					const struct iovec *iov,
					void **desc, size_t count,
					fi_addr_t src_addr,
					uint64_t tag, uint64_t ignore,
					void *context)
{
	return _ep_recvv(ep, iov, desc, count, src_addr, context,
			  FI_TAGGED, tag, ignore);
}

DIRECT_FN STATIC ssize_t gnix_ep_trecvmsg(struct fid_ep *ep,
					  const struct fi_msg_tagged *msg,
					  uint64_t flags)
{
	const struct fi_msg _msg = {
			.msg_iov = msg->msg_iov,
			.desc = msg->desc,
			.iov_count = msg->iov_count,
			.addr = msg->addr,
			.context = msg->context,
			.data = msg->data
	};

	if (flags & ~GNIX_TRECVMSG_FLAGS)
		return -FI_EINVAL;

	/* From the fi_tagged man page regarding the use of FI_CLAIM:
	 *
	 * In order to use the FI_CLAIM flag, an  application  must  supply  a
	 * struct  fi_context  structure as the context for the receive opera-
	 * tion.  The same fi_context structure used for an FI_PEEK + FI_CLAIM
	 * operation must be used by the paired FI_CLAIM requests
	 */
	if ((flags & FI_CLAIM) && _msg.context == NULL)
		return -FI_EINVAL;

	/* From the fi_tagged man page regarding the use of FI_DISCARD:
	 *
	 * This  flag  must  be used in conjunction with either
	 * FI_PEEK or FI_CLAIM.
	 *
	 * Note: I suspect the use of all three flags at the same time is invalid,
	 * but the man page does not say that it is.
	 */
	if ((flags & FI_DISCARD) && !(flags & (FI_PEEK | FI_CLAIM)))
		return -FI_EINVAL;

	return _ep_recvmsg(ep, &_msg, flags | FI_TAGGED, msg->tag,
			msg->ignore);
}

DIRECT_FN STATIC ssize_t gnix_ep_tsend(struct fid_ep *ep, const void *buf,
				       size_t len, void *desc,
				       fi_addr_t dest_addr, uint64_t tag,
				       void *context)
{
	return _ep_send(ep, buf, len, desc, dest_addr, context,
			FI_TAGGED, tag);
}

DIRECT_FN STATIC ssize_t gnix_ep_tsendv(struct fid_ep *ep,
					const struct iovec *iov,
					void **desc, size_t count,
					fi_addr_t dest_addr,
					uint64_t tag, void *context)
{
	return _ep_sendv(ep, iov, desc, count, dest_addr, context,
			 FI_TAGGED, tag);
}

DIRECT_FN STATIC ssize_t gnix_ep_tsendmsg(struct fid_ep *ep,
					  const struct fi_msg_tagged *msg,
					  uint64_t flags)
{
	const struct fi_msg _msg = {
			.msg_iov = msg->msg_iov,
			.desc = msg->desc,
			.iov_count = msg->iov_count,
			.addr = msg->addr,
			.context = msg->context,
			.data = msg->data
	};

	if (flags & ~(GNIX_SENDMSG_FLAGS))
		return -FI_EINVAL;

	return _ep_sendmsg(ep, &_msg, flags | FI_TAGGED, msg->tag);
}

DIRECT_FN STATIC ssize_t gnix_ep_tinject(struct fid_ep *ep, const void *buf,
					 size_t len, fi_addr_t dest_addr,
					 uint64_t tag)
{
	return _ep_inject(ep, buf, len, 0, dest_addr, FI_TAGGED, tag);
}

DIRECT_FN STATIC ssize_t gnix_ep_tsenddata(struct fid_ep *ep, const void *buf,
					   size_t len, void *desc,
					   uint64_t data, fi_addr_t dest_addr,
					   uint64_t tag, void *context)
{
	return _ep_senddata(ep, buf, len, desc, data, dest_addr, context,
			FI_TAGGED, tag);
}

/**
 * Injects data into the data buffer and returns immediately.
 *
 * @param[in] ep	the endpoint we are sending data from
 * @param[in] buf	the data to send
 * @param[in] len	the length of buf
 * @param[in] data	remote CQ data to transfer with the data from buf
 * @param[in] dest_addr	the desitnation address for connectionless transfers
 * @param[in] tag	the tag associated with the message
 *
 * @return FI_SUCCESS	upon successfully writing to the destination
 * @return -FI_ERRNO	upon an error
 * @return -FI_ENOSYS	if this operation is not supported
 */
DIRECT_FN STATIC ssize_t gnix_ep_tinjectdata(struct fid_ep *ep, const void *buf,
					     size_t len, uint64_t data,
					     fi_addr_t dest_addr, uint64_t tag)
{
	return _ep_inject(ep, buf, len, data, dest_addr,
			  FI_TAGGED | FI_REMOTE_CQ_DATA, tag);
}

/*******************************************************************************
 * EP atomic API implementation.
 ******************************************************************************/

DIRECT_FN int gnix_ep_atomic_valid(struct fid_ep *ep,
					  enum fi_datatype datatype,
					  enum fi_op op, size_t *count)
{
	if (count)
		*count = 1;

	return _gnix_atomic_cmd(datatype, op, GNIX_FAB_RQ_AMO) >= 0 ?
		0 : -FI_EOPNOTSUPP;
}

DIRECT_FN int gnix_ep_fetch_atomic_valid(struct fid_ep *ep,
						enum fi_datatype datatype,
						enum fi_op op, size_t *count)
{
	if (count)
		*count = 1;

	return _gnix_atomic_cmd(datatype, op, GNIX_FAB_RQ_FAMO) >= 0 ?
		0 : -FI_EOPNOTSUPP;
}

DIRECT_FN int gnix_ep_cmp_atomic_valid(struct fid_ep *ep,
					      enum fi_datatype datatype,
					      enum fi_op op, size_t *count)
{
	if (count)
		*count = 1;

	return _gnix_atomic_cmd(datatype, op, GNIX_FAB_RQ_CAMO) >= 0 ?
		0 : -FI_EOPNOTSUPP;
}

size_t
__gnix_fabric_ops_native_amo(struct fid_ep *ep, const void *buf, size_t count,
			 void *desc, void *result, void *result_desc,
				    fi_addr_t dest_addr,
				    uint64_t addr, uint64_t key,
				    enum fi_datatype datatype,
				    int req_type,
				    void *context)
{
	struct gnix_fid_ep *gnix_ep;
	struct fi_msg_atomic msg;
	struct fi_ioc msg_iov;
	struct fi_rma_ioc rma_iov;
	struct fi_ioc result_iov;
	uint64_t flags;

	if (!ep)
		return -FI_EINVAL;
	if ((req_type < 0) || (req_type > GNIX_FAB_RQ_MAX_TYPES) ||
		(req_type >= GNIX_FAB_RQ_END_NON_NATIVE &&
		 req_type < GNIX_FAB_RQ_START_NATIVE))
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	msg_iov.addr = (void *)buf;
	msg_iov.count = count;
	rma_iov.addr = addr;
	rma_iov.count = 1;
	rma_iov.key = key;
	msg.msg_iov = &msg_iov;
	msg.desc = &desc;
	msg.iov_count = 1;
	msg.addr = dest_addr;
	msg.rma_iov = &rma_iov;
	msg.datatype = datatype;
	msg.op = FI_ATOMIC_OP_LAST; /* not FI_ATOMIC_OP */
	msg.context = context;
	result_iov.addr = result;
	result_iov.count = 1;

	flags = gnix_ep->op_flags | GNIX_ATOMIC_WRITE_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, req_type, &msg, NULL,
			    NULL, 0, &result_iov, &result_desc, 1, flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_write(struct fid_ep *ep, const void *buf, size_t count,
		     void *desc, fi_addr_t dest_addr, uint64_t addr,
		     uint64_t key, enum fi_datatype datatype, enum fi_op op,
		     void *context)
{
	struct gnix_fid_ep *gnix_ep;
	struct fi_msg_atomic msg;
	struct fi_ioc msg_iov;
	struct fi_rma_ioc rma_iov;
	uint64_t flags;

	if (gnix_ep_atomic_valid(ep, datatype, op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	msg_iov.addr = (void *)buf;
	msg_iov.count = count;
	msg.msg_iov = &msg_iov;
	msg.desc = &desc;
	msg.iov_count = 1;
	msg.addr = dest_addr;
	rma_iov.addr = addr;
	rma_iov.count = 1;
	rma_iov.key = key;
	msg.rma_iov = &rma_iov;
	msg.datatype = datatype;
	msg.op = op;
	msg.context = context;

	flags = gnix_ep->op_flags | GNIX_ATOMIC_WRITE_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_AMO, &msg,
			    NULL, NULL, 0, NULL, NULL, 0, flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_writev(struct fid_ep *ep, const struct fi_ioc *iov, void **desc,
		      size_t count, fi_addr_t dest_addr, uint64_t addr,
		      uint64_t key, enum fi_datatype datatype, enum fi_op op,
		      void *context)
{
	if (!iov || count > 1) {
		return -FI_EINVAL;
	}

	return gnix_ep_atomic_write(ep, iov[0].addr, iov[0].count,
				    desc ? desc[0] : NULL,
				    dest_addr, addr, key, datatype, op,
				    context);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_writemsg(struct fid_ep *ep, const struct fi_msg_atomic *msg,
			uint64_t flags)
{
	struct gnix_fid_ep *gnix_ep;

	if (gnix_ep_atomic_valid(ep, msg->datatype, msg->op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = (flags & GNIX_ATOMICMSG_FLAGS) | GNIX_ATOMIC_WRITE_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_AMO, msg,
			    NULL, NULL, 0, NULL, NULL, 0, flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_inject(struct fid_ep *ep, const void *buf, size_t count,
		      fi_addr_t dest_addr, uint64_t addr, uint64_t key,
		      enum fi_datatype datatype, enum fi_op op)
{
	struct gnix_fid_ep *gnix_ep;
	struct fi_msg_atomic msg;
	struct fi_ioc msg_iov;
	struct fi_rma_ioc rma_iov;
	uint64_t flags;

	if (gnix_ep_atomic_valid(ep, datatype, op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	msg_iov.addr = (void *)buf;
	msg_iov.count = count;
	msg.msg_iov = &msg_iov;
	msg.desc = NULL;
	msg.iov_count = 1;
	msg.addr = dest_addr;
	rma_iov.addr = addr;
	rma_iov.count = 1;
	rma_iov.key = key;
	msg.rma_iov = &rma_iov;
	msg.datatype = datatype;
	msg.op = op;

	flags = gnix_ep->op_flags | FI_INJECT | GNIX_SUPPRESS_COMPLETION |
			GNIX_ATOMIC_WRITE_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_AMO, &msg,
			    NULL, NULL, 0, NULL, NULL, 0, flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_readwrite(struct fid_ep *ep, const void *buf, size_t count,
			 void *desc, void *result, void *result_desc,
			 fi_addr_t dest_addr, uint64_t addr, uint64_t key,
			 enum fi_datatype datatype, enum fi_op op,
			 void *context)
{
	struct gnix_fid_ep *gnix_ep;
	struct fi_msg_atomic msg;
	struct fi_ioc msg_iov;
	struct fi_rma_ioc rma_iov;
	struct fi_ioc result_iov;
	uint64_t flags;

	if (gnix_ep_fetch_atomic_valid(ep, datatype, op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	msg_iov.addr = (void *)buf;
	msg_iov.count = count;
	msg.msg_iov = &msg_iov;
	msg.desc = &desc;
	msg.iov_count = 1;
	msg.addr = dest_addr;
	rma_iov.addr = addr;
	rma_iov.count = 1;
	rma_iov.key = key;
	msg.rma_iov = &rma_iov;
	msg.datatype = datatype;
	msg.op = op;
	msg.context = context;
	result_iov.addr = result;
	result_iov.count = 1;

	flags = gnix_ep->op_flags | GNIX_ATOMIC_READ_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_FAMO, &msg,
			    NULL, NULL, 0,
			    &result_iov, &result_desc, 1,
			    flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_readwritev(struct fid_ep *ep, const struct fi_ioc *iov,
			  void **desc, size_t count, struct fi_ioc *resultv,
			  void **result_desc, size_t result_count,
			  fi_addr_t dest_addr, uint64_t addr, uint64_t key,
			  enum fi_datatype datatype, enum fi_op op,
			  void *context)
{
	if (!iov || count > 1 || !resultv)
		return -FI_EINVAL;

	return gnix_ep_atomic_readwrite(ep, iov[0].addr, iov[0].count,
					desc ? desc[0] : NULL,
					resultv[0].addr,
					result_desc ? result_desc[0] : NULL,
					dest_addr, addr, key, datatype, op,
					context);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_readwritemsg(struct fid_ep *ep, const struct fi_msg_atomic *msg,
			    struct fi_ioc *resultv, void **result_desc,
			    size_t result_count, uint64_t flags)
{
	struct gnix_fid_ep *gnix_ep;

	if (gnix_ep_fetch_atomic_valid(ep, msg->datatype, msg->op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = (flags & GNIX_FATOMICMSG_FLAGS) | GNIX_ATOMIC_READ_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_FAMO, msg,
			    NULL, NULL, 0,
			    resultv, result_desc, result_count,
			    flags);
}

DIRECT_FN STATIC ssize_t
gnix_ep_atomic_compwrite(struct fid_ep *ep, const void *buf, size_t count,
			 void *desc, const void *compare, void *compare_desc,
			 void *result, void *result_desc, fi_addr_t dest_addr,
			 uint64_t addr, uint64_t key, enum fi_datatype datatype,
			 enum fi_op op, void *context)
{
	struct gnix_fid_ep *gnix_ep;
	struct fi_msg_atomic msg;
	struct fi_ioc msg_iov;
	struct fi_rma_ioc rma_iov;
	struct fi_ioc result_iov;
	struct fi_ioc compare_iov;
	uint64_t flags;

	if (gnix_ep_cmp_atomic_valid(ep, datatype, op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	msg_iov.addr = (void *)buf;
	msg_iov.count = count;
	msg.msg_iov = &msg_iov;
	msg.desc = &desc;
	msg.iov_count = 1;
	msg.addr = dest_addr;
	rma_iov.addr = addr;
	rma_iov.count = 1;
	rma_iov.key = key;
	msg.rma_iov = &rma_iov;
	msg.datatype = datatype;
	msg.op = op;
	msg.context = context;
	result_iov.addr = result;
	result_iov.count = 1;
	compare_iov.addr = (void *)compare;
	compare_iov.count = 1;

	flags = gnix_ep->op_flags | GNIX_ATOMIC_READ_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_CAMO, &msg,
			    &compare_iov, &compare_desc, 1,
			    &result_iov, &result_desc, 1,
			    flags);
}

DIRECT_FN STATIC ssize_t gnix_ep_atomic_compwritev(struct fid_ep *ep,
						   const struct fi_ioc *iov,
						   void **desc,
						   size_t count,
						   const struct fi_ioc *comparev,
						   void **compare_desc,
						   size_t compare_count,
						   struct fi_ioc *resultv,
						   void **result_desc,
						   size_t result_count,
						   fi_addr_t dest_addr,
						   uint64_t addr, uint64_t key,
						   enum fi_datatype datatype,
						   enum fi_op op,
						   void *context)
{
	if (!iov || count > 1 || !resultv || !comparev)
		return -FI_EINVAL;

	return gnix_ep_atomic_compwrite(ep, iov[0].addr, iov[0].count,
					desc ? desc[0] : NULL,
					comparev[0].addr,
					compare_desc ? compare_desc[0] : NULL,
					resultv[0].addr,
					result_desc ? result_desc[0] : NULL,
					dest_addr, addr, key, datatype, op,
					context);
}

DIRECT_FN STATIC ssize_t gnix_ep_atomic_compwritemsg(struct fid_ep *ep,
						     const struct fi_msg_atomic *msg,
						     const struct fi_ioc *comparev,
						     void **compare_desc,
						     size_t compare_count,
						     struct fi_ioc *resultv,
						     void **result_desc,
						     size_t result_count,
						     uint64_t flags)
{
	struct gnix_fid_ep *gnix_ep;

	if (gnix_ep_cmp_atomic_valid(ep, msg->datatype, msg->op, NULL))
		return -FI_EOPNOTSUPP;

	if (!ep)
		return -FI_EINVAL;

	gnix_ep = container_of(ep, struct gnix_fid_ep, ep_fid);
	assert(GNIX_EP_RDM_DGM_MSG(gnix_ep->type));

	flags = (flags & GNIX_CATOMICMSG_FLAGS) | GNIX_ATOMIC_READ_FLAGS_DEF;

	return _gnix_atomic(gnix_ep, GNIX_FAB_RQ_CAMO, msg,
			    comparev, compare_desc, compare_count,
			    resultv, result_desc, result_count,
			    flags);
}

/*******************************************************************************
 * Base EP API function implementations.
 ******************************************************************************/

DIRECT_FN STATIC int gnix_ep_control(fid_t fid, int command, void *arg)
{
	int ret = FI_SUCCESS;
	struct gnix_fid_ep *ep;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	ep = container_of(fid, struct gnix_fid_ep, ep_fid);

	switch (command) {
	/*
	 * for FI_EP_RDM/DGRAM, enable the cm_nic associated
	 * with this ep.
	 */
	case FI_ENABLE:

		if (GNIX_EP_RDM_DGM(ep->type)) {
			if ((ep->send_cq && ep->tx_enabled)) {
				ret = -FI_EOPBADSTATE;
				goto err;
			}
			if ((ep->recv_cq && ep->rx_enabled)) {
				ret = -FI_EOPBADSTATE;
				goto err;
			}
			ret = _gnix_vc_cm_init(ep->cm_nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
				     "_gnix_vc_cm_nic_init call returned %d\n",
					ret);
				goto err;
			}
			ret = _gnix_cm_nic_enable(ep->cm_nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
				     "_gnix_cm_nic_enable call returned %d\n",
					ret);
				goto err;
			}
		}

		ret = _gnix_ep_tx_enable(ep);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
			     "_gnix_ep_tx_enable call returned %d\n",
				ret);
			goto err;
		}

		ret = _gnix_ep_rx_enable(ep);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
			     "_gnix_ep_rx_enable call returned %d\n",
				ret);
			goto err;
		}

		ret = _gnix_ep_int_tx_pool_init(ep);
		break;

	case FI_GETOPSFLAG:
	case FI_SETOPSFLAG:
	case FI_ALIAS:
	default:
		return -FI_ENOSYS;
	}

err:
	return ret;
}

static int __destruct_tag_storages(struct gnix_fid_ep *ep)
{
	int ret;

	GNIX_INFO(FI_LOG_EP_CTRL, "destroying tag storage\n");

	ret = _gnix_tag_storage_destroy(&ep->unexp_recv_queue);
	if (ret)
		return ret;

	ret = _gnix_tag_storage_destroy(&ep->posted_recv_queue);
	if (ret)
		return ret;

	ret = _gnix_tag_storage_destroy(&ep->tagged_unexp_recv_queue);
	if (ret)
		return ret;

	ret = _gnix_tag_storage_destroy(&ep->tagged_posted_recv_queue);

	return ret;
}

static void __ep_destruct(void *obj)
{
	int ret;
	struct gnix_fid_domain *domain;
	struct gnix_fid_av *av;
	gnix_ht_key_t *key_ptr;
	struct gnix_fid_ep *ep = (struct gnix_fid_ep *) obj;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	if (ep->type == FI_EP_MSG) {
		if (GNIX_EP_CONNECTED(ep)) {
			assert(ep->vc);
			ret = _gnix_vc_destroy(ep->vc);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "_gnix_vc_destroy returned %s\n",
					  fi_strerror(-ret));
			}
		}
	} else if (ep->av) {
		/* Remove EP from CM NIC lookup list. */
		key_ptr = (gnix_ht_key_t *)&ep->src_addr.gnix_addr;
		ret =  _gnix_ht_remove(ep->cm_nic->addr_to_ep_ht,
				       *key_ptr);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_ht_remove returned %s\n",
				  fi_strerror(-ret));
		}

		/* Destroy EP VC storage. */
		ret = __gnix_ep_fini_vc(ep);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_ht_remove returned %s\n",
				  fi_strerror(-ret));
		}
	}

	if (ep->eq) {
		_gnix_eq_poll_obj_rem(ep->eq, &ep->ep_fid.fid);
		_gnix_ref_put(ep->eq);
	}

	if (ep->send_cq) {
		_gnix_cq_poll_obj_rem(ep->send_cq, ep->nic,
				      _gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cq_poll_obj_rem(ep->send_cq, ep->cm_nic,
					      _gnix_cm_nic_progress);
		_gnix_ref_put(ep->send_cq);
	}

	if (ep->recv_cq) {
		_gnix_cq_poll_obj_rem(ep->recv_cq, ep->nic,
				       _gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cq_poll_obj_rem(ep->recv_cq, ep->cm_nic,
					      _gnix_cm_nic_progress);
		_gnix_ref_put(ep->recv_cq);
	}

	if (ep->send_cntr) {
		_gnix_cntr_poll_obj_rem(ep->send_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->send_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->send_cntr);
	}

	if (ep->recv_cntr) {
		_gnix_cntr_poll_obj_rem(ep->recv_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->recv_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->recv_cntr);
	}

	if (ep->write_cntr) {
		_gnix_cntr_poll_obj_rem(ep->write_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->write_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->write_cntr);
	}

	if (ep->read_cntr) {
		_gnix_cntr_poll_obj_rem(ep->read_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->read_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->read_cntr);
	}

	if (ep->rwrite_cntr) {
		_gnix_cntr_poll_obj_rem(ep->rwrite_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->rwrite_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->rwrite_cntr);
	}

	if (ep->rread_cntr) {
		_gnix_cntr_poll_obj_rem(ep->rread_cntr, ep->nic,
					_gnix_nic_progress);
		if (ep->cm_nic) /* No CM NIC for MSG EPs */
			_gnix_cntr_poll_obj_rem(ep->rread_cntr, ep->cm_nic,
						_gnix_cm_nic_progress);
		_gnix_ref_put(ep->rread_cntr);
	}

	if (ep->stx_ctx)
		_gnix_ref_put(ep->stx_ctx);

	if (ep->xpmem_hndl) {
		ret = _gnix_xpmem_handle_destroy(ep->xpmem_hndl);
		if (ret != FI_SUCCESS)
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_xpmem_handle_destroy returned %s\n",
				  fi_strerror(-ret));
	}

	domain = ep->domain;
	assert(domain != NULL);
	_gnix_ref_put(domain);

	av = ep->av;
	if (av != NULL)
		_gnix_ref_put(av);

	if (ep->nic) {
		ret = _gnix_nic_free(ep->nic);
		if (ret != FI_SUCCESS)
			GNIX_FATAL(FI_LOG_EP_CTRL,
				   "_gnix_nic_free failed: %d\n");
	}

	if (ep->cm_nic) {
		ret = _gnix_cm_nic_free(ep->cm_nic);
		if (ret != FI_SUCCESS)
			GNIX_FATAL(FI_LOG_EP_CTRL,
				   "_gnix_cm_nic_free failed: %d\n");
	}

	__destruct_tag_storages(ep);

	/*
	 * Free fab_reqs
	 */

	__fr_freelist_destroy(ep);
	_gnix_ep_int_tx_pool_fini(ep);

	fi_freeinfo(ep->info);

	free(ep);
}

int gnix_ep_close(fid_t fid)
{
	int ret = FI_SUCCESS;
	struct gnix_fid_ep *ep;
	int references_held;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);

	references_held = _gnix_ref_put(ep);
	if (references_held)
		GNIX_INFO(FI_LOG_EP_CTRL, "failed to fully close ep due "
			  "to lingering references. references=%i ep=%p\n",
			  references_held, ep);

	return ret;
}

DIRECT_FN int gnix_ep_bind(fid_t fid, struct fid *bfid, uint64_t flags)
{
	int ret = FI_SUCCESS;
	struct gnix_fid_ep  *ep;
	struct gnix_fid_eq *eq;
	struct gnix_fid_av  *av;
	struct gnix_fid_cq  *cq;
	struct gnix_fid_stx *stx;
	struct gnix_fid_cntr *cntr;
	struct gnix_fid_trx *trx_priv;
	struct gnix_nic_attr nic_attr = {0};

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	switch (fid->fclass) {
	case FI_CLASS_TX_CTX:
	case FI_CLASS_RX_CTX:
		trx_priv = container_of(fid, struct gnix_fid_trx, ep_fid);
		ep = trx_priv->ep;
		break;
	default:
		ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);
	}

	ret = ofi_ep_bind_valid(&gnix_prov, bfid, flags);
	if (ret)
		return ret;

	/*
	 * Per fi_endpoint man page, can't bind an object
	 * to an ep after its been enabled.
	 * For scalable endpoints, the rx/tx contexts are bound to the same
	 * gnix_ep so we allow enabling of the tx before binding the rx and
	 * vice versa.
	 */
	switch (fid->fclass) {
	case FI_CLASS_TX_CTX:
		if (ep->send_cq && ep->tx_enabled) {
			return -FI_EOPBADSTATE;
		}
		break;
	case FI_CLASS_RX_CTX:
		if (ep->recv_cq && ep->rx_enabled) {
			return -FI_EOPBADSTATE;
		}
		break;
	default:
		if ((ep->send_cq && ep->tx_enabled) ||
			(ep->recv_cq && ep->rx_enabled)) {
			return -FI_EOPBADSTATE;
		}
	}

	switch (bfid->fclass) {
	case FI_CLASS_EQ:
		eq = container_of(bfid, struct gnix_fid_eq, eq_fid.fid);
		if (ep->domain->fabric != eq->fabric) {
			ret = -FI_EINVAL;
			break;
		}

		if (ep->eq) {
			ret = -FI_EINVAL;
			break;
		}

		ep->eq = eq;
		_gnix_eq_poll_obj_add(eq, &ep->ep_fid.fid);
		_gnix_ref_get(eq);

		GNIX_DEBUG(FI_LOG_EP_CTRL, "Bound EQ to EP: %p, %p\n", eq, ep);
		break;
	case FI_CLASS_CQ:
		cq = container_of(bfid, struct gnix_fid_cq, cq_fid.fid);
		if (ep->domain != cq->domain) {
			ret = -FI_EINVAL;
			break;
		}
		if (flags & FI_TRANSMIT) {
			/* don't allow rebinding */
			if (ep->send_cq) {
				ret = -FI_EINVAL;
				break;
			}

			ep->send_cq = cq;
			if (flags & FI_SELECTIVE_COMPLETION) {
				ep->send_selective_completion = 1;
			}

			_gnix_ref_get(cq);
		}
		if (flags & FI_RECV) {
			/* don't allow rebinding */
			if (ep->recv_cq) {
				ret = -FI_EINVAL;
				break;
			}

			ep->recv_cq = cq;
			if (flags & FI_SELECTIVE_COMPLETION) {
				ep->recv_selective_completion = 1;
			}

			_gnix_ref_get(cq);
		}
		break;
	case FI_CLASS_AV:
		av = container_of(bfid, struct gnix_fid_av, av_fid.fid);
		if (ep->domain != av->domain) {
			ret = -FI_EINVAL;
			break;
		}
		ep->av = av;
		_gnix_ep_init_vc(ep);
		_gnix_ref_get(ep->av);
		break;
	case FI_CLASS_CNTR:
		cntr = container_of(bfid, struct gnix_fid_cntr, cntr_fid.fid);
		if (ep->domain != cntr->domain) {
			ret = -FI_EINVAL;
			break;
		}

		if (flags & FI_SEND) {
			/* don't allow rebinding */
			if (ep->send_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind send counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->send_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		if (flags & FI_RECV) {
			/* don't allow rebinding */
			if (ep->recv_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind recv counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->recv_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		if (flags & FI_WRITE) {
			/* don't allow rebinding */
			if (ep->write_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind write counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->write_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		if (flags & FI_READ) {
			/* don't allow rebinding */
			if (ep->read_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind read counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->read_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		if (flags & FI_REMOTE_WRITE) {
			/* don't allow rebinding */
			if (ep->rwrite_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind rwrite counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->rwrite_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		if (flags & FI_REMOTE_READ) {
			/* don't allow rebinding */
			if (ep->rread_cntr) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "cannot rebind rread counter (%p)\n",
					  cntr);
				ret = -FI_EINVAL;
				break;
			}
			ep->rread_cntr = cntr;
			_gnix_ref_get(cntr);
		}

		break;

	case FI_CLASS_STX_CTX:
		stx = container_of(bfid, struct gnix_fid_stx, stx_fid.fid);
		if (ep->domain != stx->domain) {
			ret = -FI_EINVAL;
			break;
		}

		/*
		 * can only bind an STX to an ep opened with
		 * FI_SHARED_CONTEXT ep_attr->tx_ctx_cnt and also
		 * if a nic has not been previously bound
		 */

		if (ep->shared_tx == false || ep->nic) {
			ret =  -FI_EOPBADSTATE;
			break;
		}

		/*
		 * we force allocation of a nic to make semantics
		 * match the intent fi_endpoint man page, provide
		 * a TX context (aka gnix nic) that can be shared
		 * explicitly amongst endpoints
		 */
		if (stx->auth_key && ep->auth_key != stx->auth_key) {
			ret = -FI_EINVAL;
			break;
		}

		if (!stx->nic) {
			nic_attr.must_alloc = true;
			nic_attr.auth_key = ep->auth_key;
			ret = gnix_nic_alloc(ep->domain, &nic_attr,
				&stx->nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					 "_gnix_nic_alloc call returned %d\n",
					ret);
					break;
			}
			stx->auth_key = nic_attr.auth_key;
		}

		ep->stx_ctx = stx;
		_gnix_ref_get(ep->stx_ctx);

		ep->nic = stx->nic;
		if (ep->nic->smsg_callbacks == NULL)
			ep->nic->smsg_callbacks = gnix_ep_smsg_callbacks;
		_gnix_ref_get(ep->nic);
		break;

	case FI_CLASS_MR:/*TODO: got to figure this one out */
	default:
		ret = -FI_ENOSYS;
		break;
	}

	return ret;
}

static void gnix_ep_caps(struct gnix_fid_ep *ep_priv, uint64_t caps)
{
	if (ofi_recv_allowed(caps & ~FI_TAGGED))
		ep_priv->ep_ops.msg_recv_allowed = 1;

	if (ofi_send_allowed(caps & ~FI_TAGGED))
		ep_priv->ep_ops.msg_send_allowed = 1;

	if (ofi_recv_allowed(caps & ~FI_MSG))
		ep_priv->ep_ops.tagged_recv_allowed = 1;

	if (ofi_send_allowed(caps & ~FI_MSG))
		ep_priv->ep_ops.tagged_send_allowed = 1;

}

static int __init_tag_storages(struct gnix_fid_ep *ep, int tag_type,
			       int use_addrs)
{
	int tsret;
	struct gnix_tag_storage_attr untagged_attr = {
			.type = tag_type,
			.use_src_addr_matching = use_addrs,
	};
	struct gnix_tag_storage_attr tagged_attr = {
			.type = tag_type,
			.use_src_addr_matching = use_addrs,
	};

	GNIX_INFO(FI_LOG_EP_CTRL, "initializing tag storage, tag_type=%d\n",
			tag_type);

	/* init untagged storages */
	tsret = _gnix_posted_tag_storage_init(
			&ep->posted_recv_queue, &untagged_attr);
	if (tsret)
		return tsret;

	tsret = _gnix_unexpected_tag_storage_init(
			&ep->unexp_recv_queue, &untagged_attr);
	if (tsret)
		return tsret;

	/* init tagged storages */
	tsret = _gnix_posted_tag_storage_init(
			&ep->tagged_posted_recv_queue, &tagged_attr);
	if (tsret)
		return tsret;

	tsret = _gnix_unexpected_tag_storage_init(
			&ep->tagged_unexp_recv_queue, &tagged_attr);

	return tsret;
}

static int _gnix_ep_nic_init(struct gnix_fid_domain *domain,
			     struct fi_info *info,
			     struct gnix_fid_ep *ep)
{
	int ret = FI_SUCCESS;
	uint32_t cdm_id = GNIX_CREATE_CDM_ID;
	struct gnix_ep_name *name;
	struct gnix_nic_attr nic_attr = {0};

	if (ep->type == FI_EP_MSG) {
		if (ep->shared_tx == false) {
			nic_attr.auth_key = ep->auth_key;

			ret = gnix_nic_alloc(domain, &nic_attr,
				&ep->nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "_gnix_nic_alloc call returned %d\n",
					  ret);
			}
		}
		return ret;
	}

	name = (struct gnix_ep_name *)info->src_addr;
	if (name && name->name_type == GNIX_EPN_TYPE_BOUND) {
		/* Endpoint was bound to a specific source address.  Create a
		 * new CM NIC to listen on this address. */
		ret = _gnix_cm_nic_alloc(domain, info, name->gnix_addr.cdm_id,
				ep->auth_key, &ep->cm_nic);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_cm_nic_alloc returned %s\n",
				  fi_strerror(-ret));
			return ret;
		}

		ep->src_addr = ep->cm_nic->my_name;

		/*
		 * if this endpoint is not going to use a shared TX
		 * aka gnix_nic, link its nic with the one being
		 * used for the cm_nic to reduce pressure on underlying
		* hardware resources.
		*/
		if (ep->shared_tx == false) {
			ep->nic = ep->cm_nic->nic;
			_gnix_ref_get(ep->nic);

			GNIX_INFO(FI_LOG_EP_CTRL,
				  "Allocated new NIC for bound EP: %p (ID:%d)\n",
				  ep->src_addr.gnix_addr.cdm_id);
			}
	} else {
		fastlock_acquire(&domain->cm_nic_lock);

		/* Allocate a domain CM NIC, if needed. */
		if (domain->cm_nic == NULL) {
			ret = _gnix_cm_nic_create_cdm_id(domain, &cdm_id);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "gnix_cm_nic_create_cdm_id returned %s\n",
					  fi_strerror(-ret));
				return ret;
			}

			ret = _gnix_cm_nic_alloc(domain, info, cdm_id,
					ep->auth_key, &domain->cm_nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					  "_gnix_cm_nic_alloc returned %s\n",
					  fi_strerror(-ret));
				fastlock_release(&domain->cm_nic_lock);
				return ret;
			}

			/* Use the newly allocated domain CM NIC for data
			 * movement on this EP if not using STX. */
			ep->cm_nic = domain->cm_nic;
			if (ep->shared_tx == false) {
				ep->nic = ep->cm_nic->nic;
				_gnix_ref_get(ep->nic);
			}

			GNIX_INFO(FI_LOG_EP_CTRL,
				  "Allocated new NIC for EP: %p (ID:%d)\n",
				  ep->src_addr.gnix_addr.cdm_id);
		} else {
			/* Re-use the existing domain CM NIC. */
			ep->cm_nic = domain->cm_nic;
			_gnix_ref_get(ep->cm_nic);

			if (ep->shared_tx == false) {
				nic_attr.auth_key = ep->auth_key;

				/* Allocate a new NIC for data
				   movement on this EP. */
				ret = gnix_nic_alloc(domain,
					&nic_attr, &ep->nic);
				if (ret != FI_SUCCESS) {
					GNIX_WARN(FI_LOG_EP_CTRL,
					    "_gnix_nic_alloc call returned %d\n",
					     ret);
					fastlock_release(&domain->cm_nic_lock);
					return ret;
				}

				GNIX_INFO(FI_LOG_EP_CTRL,
					  "Allocated new NIC for xfers: %p (ID:%d)\n",
					  ep->src_addr.gnix_addr.cdm_id);
			}
		}

		fastlock_release(&domain->cm_nic_lock);

		ep->src_addr.gnix_addr.device_addr =
			ep->cm_nic->my_name.gnix_addr.device_addr;
		ep->src_addr.cm_nic_cdm_id =
			ep->cm_nic->my_name.gnix_addr.cdm_id;

		ret = _gnix_cm_nic_create_cdm_id(domain, &cdm_id);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "gnix_cm_nic_create_cdm_id returned %s\n",
				  fi_strerror(-ret));
			if(ep->nic != NULL)
				_gnix_ref_put(ep->nic);
			return ret;
		}
		ep->src_addr.gnix_addr.cdm_id = cdm_id;
	}

	return FI_SUCCESS;
}

static int _gnix_ep_msg_open(struct gnix_fid_domain *domain,
			     struct fi_info *info,
			     struct gnix_fid_ep *ep)
{
	ep->ep_fid.cm = &gnix_ep_msg_ops_cm;
	ep->conn_fd = -1;
	ep->conn_state = GNIX_EP_UNCONNECTED;

	return FI_SUCCESS;
}

static int _gnix_ep_unconn_open(struct gnix_fid_domain *domain,
				struct fi_info *info,
				struct gnix_fid_ep *ep)
{
	int ret;
	gnix_ht_key_t *key_ptr;

	key_ptr = (gnix_ht_key_t *)&ep->src_addr.gnix_addr;
	ret = _gnix_ht_insert(ep->cm_nic->addr_to_ep_ht,
			      *key_ptr, ep);
	if ((ret != FI_SUCCESS) && (ret != -FI_ENOSPC)) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			  "__gnix_ht_insert returned %d\n",
			  ret);
		return ret;
	}

	/* Unconnected endpoints use a limited set of CM ops. */
	ep->ep_fid.cm = &gnix_ep_ops_cm;

	return FI_SUCCESS;
}

DIRECT_FN int gnix_ep_open(struct fid_domain *domain, struct fi_info *info,
			   struct fid_ep **ep, void *context)
{
	int ret = FI_SUCCESS;
	int err_ret;
	struct gnix_fid_domain *domain_priv;
	struct gnix_fid_ep *ep_priv;
	struct gnix_auth_key *auth_key;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	if ((domain == NULL) || (info == NULL) || (ep == NULL) ||
	    (info->ep_attr == NULL))
		return -FI_EINVAL;

	domain_priv = container_of(domain, struct gnix_fid_domain, domain_fid);

	if (FI_VERSION_LT(domain_priv->fabric->fab_fid.api_version,
		FI_VERSION(1, 5)) &&
		(info->ep_attr->auth_key || info->ep_attr->auth_key_size))
		return -FI_EINVAL;

	if (info->ep_attr->auth_key_size) {
		auth_key = GNIX_GET_AUTH_KEY(info->ep_attr->auth_key,
				info->ep_attr->auth_key_size,
				domain_priv->using_vmdh);
		if (!auth_key)
			return -FI_EINVAL;
	} else {
		auth_key = domain_priv->auth_key;
		assert(auth_key);
	}

	ep_priv = calloc(1, sizeof *ep_priv);
	if (!ep_priv)
		return -FI_ENOMEM;

	/* Set up libfabric fid data. */
	ep_priv->ep_fid.fid.fclass = FI_CLASS_EP;
	ep_priv->ep_fid.fid.context = context;
	ep_priv->ep_fid.fid.ops = &gnix_ep_fi_ops;
	ep_priv->ep_fid.ops = &gnix_ep_ops;
	ep_priv->ep_fid.msg = &gnix_ep_msg_ops;
	ep_priv->ep_fid.rma = &gnix_ep_rma_ops;
	ep_priv->ep_fid.tagged = &gnix_ep_tagged_ops;
	ep_priv->ep_fid.atomic = &gnix_ep_atomic_ops;

	/* Init GNIX data. */
	ep_priv->auth_key = auth_key;
	ep_priv->type = info->ep_attr->type;
	ep_priv->domain = domain_priv;
	_gnix_ref_init(&ep_priv->ref_cnt, 1, __ep_destruct);
	ep_priv->min_multi_recv = GNIX_OPT_MIN_MULTI_RECV_DEFAULT;
	fastlock_init(&ep_priv->vc_lock);
	ep_priv->progress_fn = NULL;
	ep_priv->rx_progress_fn = NULL;
	ep_priv->tx_enabled = false;
	ep_priv->rx_enabled = false;
	ep_priv->requires_lock = (domain_priv->thread_model !=
				  FI_THREAD_COMPLETION);
	ep_priv->info = fi_dupinfo(info);
	ep_priv->info->addr_format = info->addr_format;

	GNIX_DEBUG(FI_LOG_DEBUG, "ep(%p) is using addr_format(%s)\n", ep_priv,
		  ep_priv->info->addr_format == FI_ADDR_STR ? "FI_ADDR_STR" :
		  "FI_ADDR_GNI");

	if (info->src_addr) {
		memcpy(&ep_priv->src_addr, info->src_addr,
		       sizeof(struct gnix_ep_name));
	}

	if (info->dest_addr) {
		memcpy(&ep_priv->dest_addr, info->dest_addr,
		       sizeof(struct gnix_ep_name));
	}

	ret = __init_tag_storages(ep_priv, GNIX_TAG_LIST,
				  ep_priv->type == FI_EP_MSG ? 0 : 1);
	if (ret)
		goto err_tag_init;

	ret = __fr_freelist_init(ep_priv);
	if (ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			 "Error allocating gnix_fab_req freelist (%s)",
			 fi_strerror(-ret));
		goto err_fl_init;
	}

	ep_priv->shared_tx = (info->ep_attr->tx_ctx_cnt == FI_SHARED_CONTEXT) ?
				true : false;
	/*
	 * try out XPMEM
	 */
	ret = _gnix_xpmem_handle_create(domain_priv,
					&ep_priv->xpmem_hndl);
	if (ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			  "_gnix_xpmem_handl_create returned %s\n",
			  fi_strerror(-ret));
	}

	/* Initialize caps, modes, permissions, behaviors. */
	ep_priv->caps = info->caps & GNIX_EP_CAPS_FULL;

	if (ep_priv->info->tx_attr)
		ep_priv->op_flags = ep_priv->info->tx_attr->op_flags;
	if (ep_priv->info->rx_attr)
		ep_priv->op_flags |= ep_priv->info->rx_attr->op_flags;
	ep_priv->op_flags &= GNIX_EP_OP_FLAGS;

	gnix_ep_caps(ep_priv, ep_priv->caps);

	ret = _gnix_ep_nic_init(domain_priv, ep_priv->info, ep_priv);
	if (ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			  "_gnix_ep_nic_init returned %d\n",
			  ret);
		goto err_nic_init;
	}

	/* Do EP type specific initialization. */
	switch (ep_priv->type) {
	case FI_EP_DGRAM:
	case FI_EP_RDM:
		ret = _gnix_ep_unconn_open(domain_priv, ep_priv->info, ep_priv);
		if (ret != FI_SUCCESS) {
			GNIX_INFO(FI_LOG_EP_CTRL,
				  "_gnix_ep_unconn_open() failed, err: %d\n",
				  ret);
			goto err_type_init;
		}
		break;
	case FI_EP_MSG:
		ret = _gnix_ep_msg_open(domain_priv, ep_priv->info, ep_priv);
		if (ret != FI_SUCCESS) {
			GNIX_INFO(FI_LOG_EP_CTRL,
				  "_gnix_ep_msg_open() failed, err: %d\n",
				  ret);
			goto err_type_init;
		}
		break;
	default:
		ret = -FI_EINVAL;
		goto err_type_init;
	}

	_gnix_ref_get(ep_priv->domain);

	*ep = &ep_priv->ep_fid;

	return ret;

err_type_init:
	if (ep_priv->nic)
		_gnix_nic_free(ep_priv->nic);
	_gnix_cm_nic_free(ep_priv->cm_nic);
err_nic_init:
	if (ep_priv->xpmem_hndl) {
		err_ret = _gnix_xpmem_handle_destroy(ep_priv->xpmem_hndl);
		if (err_ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				  "_gnix_xpmem_handle_destroy returned %s\n",
				  fi_strerror(-err_ret));
		}
	}

	__fr_freelist_destroy(ep_priv);
err_fl_init:
	__destruct_tag_storages(ep_priv);
err_tag_init:
	free(ep_priv);

	return ret;
}

int _gnix_ep_alloc(struct fid_domain *domain, struct fi_info *info,
			   struct gnix_ep_attr *attr,
			   struct fid_ep **ep, void *context)
{
	int ret = FI_SUCCESS;
	int err_ret;
	struct gnix_fid_domain *domain_priv;
	struct gnix_fid_ep *ep_priv;
	gnix_ht_key_t *key_ptr;
	struct gnix_auth_key *auth_key;
	uint32_t cdm_id;
	bool free_list_inited = false;
	struct gnix_nic_attr nic_attr = {0};

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	if ((domain == NULL) || (info == NULL) || (ep == NULL) ||
	    (info->ep_attr == NULL))
		return -FI_EINVAL;

	domain_priv = container_of(domain, struct gnix_fid_domain, domain_fid);

	if (info->ep_attr->auth_key_size) {
		auth_key = GNIX_GET_AUTH_KEY(info->ep_attr->auth_key,
				info->ep_attr->auth_key_size,
				domain_priv->using_vmdh);
		if (!auth_key)
			return -FI_EINVAL;
	} else {
		auth_key = domain_priv->auth_key;
		assert(auth_key);
	}

	ep_priv = calloc(1, sizeof(*ep_priv));
	if (!ep_priv)
		return -FI_ENOMEM;

	ep_priv->auth_key = auth_key;

	ep_priv->requires_lock = (domain_priv->thread_model !=
				FI_THREAD_COMPLETION);

	ep_priv->ep_fid.fid.fclass = FI_CLASS_EP;
	ep_priv->ep_fid.fid.context = context;

	ep_priv->ep_fid.fid.ops = &gnix_ep_fi_ops;
	ep_priv->ep_fid.ops = &gnix_ep_ops;
	ep_priv->domain = domain_priv;
	ep_priv->type = info->ep_attr->type;
	ep_priv->info = fi_dupinfo(info);

	_gnix_ref_init(&ep_priv->ref_cnt, 1, __ep_destruct);

	ep_priv->caps = info->caps & GNIX_EP_CAPS_FULL;

	if (info->tx_attr)
		ep_priv->op_flags = info->tx_attr->op_flags;
	if (info->rx_attr)
		ep_priv->op_flags |= info->rx_attr->op_flags;
	ep_priv->op_flags &= GNIX_EP_OP_FLAGS;

	ep_priv->min_multi_recv = GNIX_OPT_MIN_MULTI_RECV_DEFAULT;

	if (attr && attr->msg_ops)
		ep_priv->ep_fid.msg = attr->msg_ops;
	else
		ep_priv->ep_fid.msg = &gnix_ep_msg_ops;

	if (attr && attr->rma_ops)
		ep_priv->ep_fid.rma = attr->rma_ops;
	else
		ep_priv->ep_fid.rma = &gnix_ep_rma_ops;

	if (attr && attr->tagged_ops)
		ep_priv->ep_fid.tagged = attr->tagged_ops;
	else
		ep_priv->ep_fid.tagged = &gnix_ep_tagged_ops;

	if (attr && attr->atomic_ops)
		ep_priv->ep_fid.atomic = attr->atomic_ops;
	else
		ep_priv->ep_fid.atomic = &gnix_ep_atomic_ops;

	if (attr && attr->cm_ops)
		ep_priv->ep_fid.cm = attr->cm_ops;
	else
		ep_priv->ep_fid.cm = &gnix_ep_ops_cm;

	gnix_ep_caps(ep_priv, ep_priv->caps);

	ret = __init_tag_storages(ep_priv, GNIX_TAG_LIST, 1);
	if (ret) {
		goto err;
	}

	ret = __fr_freelist_init(ep_priv);
	if (ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			 "Error allocating gnix_fab_req freelist (%s)",
			 fi_strerror(-ret));
		goto err;
	} else
		free_list_inited = true;

	/*
	 * try out XPMEM
	 */

	ret = _gnix_xpmem_handle_create(domain_priv,
					&ep_priv->xpmem_hndl);
	if (ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL, "xpmem_handl_create returned %s\n",
			  fi_strerror(-ret));
	}

	if (attr && attr->cm_nic) {
		ep_priv->cm_nic = attr->cm_nic;
		_gnix_ref_get(ep_priv->cm_nic);
	} else {

		/*
		 * if a cm_nic has not yet been allocated for this
		 * domain, do it now.  Reuse the embedded gnix_nic
		 * in the cm_nic as the nic for this endpoint
		 * to reduce demand on Aries hw resources.
		 */

		fastlock_acquire(&domain_priv->cm_nic_lock);
		if (domain_priv->cm_nic == NULL) {
			ret = _gnix_cm_nic_alloc(domain_priv, info,
						 cdm_id,
						 ep_priv->auth_key,
						 &domain_priv->cm_nic);
			if (ret != FI_SUCCESS) {
				GNIX_WARN(FI_LOG_EP_CTRL,
					"_gnix_cm_nic_alloc returned %s\n",
					fi_strerror(-ret));
				fastlock_release(
					 &domain_priv->cm_nic_lock);
				goto err;
			}
			ep_priv->cm_nic = domain_priv->cm_nic;
			ep_priv->nic = ep_priv->cm_nic->nic;
			_gnix_ref_get(ep_priv->nic);
		} else {
			ep_priv->cm_nic = domain_priv->cm_nic;
			_gnix_ref_get(ep_priv->cm_nic);
		}

		fastlock_release(&domain_priv->cm_nic_lock);

	}

	ep_priv->src_addr.gnix_addr.device_addr =
		ep_priv->cm_nic->my_name.gnix_addr.device_addr;
	ep_priv->src_addr.cm_nic_cdm_id =
		ep_priv->cm_nic->my_name.gnix_addr.cdm_id;

	if (attr && attr->use_cdm_id) {
		cdm_id = attr->cdm_id;
	} else {
		ret = _gnix_cm_nic_create_cdm_id(domain_priv, &cdm_id);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				    "gnix_cm_nic_create_cdm_id returned %s\n",
				     fi_strerror(-ret));
			goto err;
		}
	}
	ep_priv->src_addr.gnix_addr.cdm_id = cdm_id;

	key_ptr = (gnix_ht_key_t *)&ep_priv->src_addr.gnix_addr;
	ret = _gnix_ht_insert(ep_priv->cm_nic->addr_to_ep_ht,
			      *key_ptr,
			      ep_priv);
	if ((ret != FI_SUCCESS) && (ret != -FI_ENOSPC)) {
		GNIX_WARN(FI_LOG_EP_CTRL,
			  "__gnix_ht_insert returned %d\n",
			  ret);
		goto err;
	}

	fastlock_init(&ep_priv->vc_lock);

	ep_priv->progress_fn = NULL;
	ep_priv->rx_progress_fn = NULL;
	ep_priv->tx_enabled = false;
	ep_priv->rx_enabled = false;

	if (attr && attr->nic) {
		ep_priv->nic = attr->nic;
	} else {
		assert(ep_priv->nic == NULL);
		nic_attr.auth_key = ep_priv->auth_key;

		ret = gnix_nic_alloc(domain_priv, &nic_attr,
			&ep_priv->nic);
		if (ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
				    "gnix_nic_alloc call returned %d\n", ret);
			goto err;
		}
		if (!(attr && attr->cm_nic)) {
			ep_priv->cm_nic = domain_priv->cm_nic;
		}
		_gnix_ref_get(ep_priv->nic);
	}

	/*
	 * if smsg callbacks not present hook them up now
	 */

	if (ep_priv->nic->smsg_callbacks == NULL)
		ep_priv->nic->smsg_callbacks = gnix_ep_smsg_callbacks;

	_gnix_ref_get(ep_priv->domain);
	*ep = &ep_priv->ep_fid;
	return ret;

err:
	if (ep_priv->xpmem_hndl) {
		err_ret = _gnix_xpmem_handle_destroy(ep_priv->xpmem_hndl);
		if (err_ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
					"_gnix_xpmem_handle_destroy returned %s\n",
					fi_strerror(-err_ret));
		}
	}

	err_ret = __destruct_tag_storages(ep_priv);
	if (err_ret != FI_SUCCESS) {
		GNIX_WARN(FI_LOG_EP_CTRL,
				"__destruct_tag_stroages returned %s\n",
				fi_strerror(-err_ret));
	}

	if (free_list_inited == true)
		__fr_freelist_destroy(ep_priv);

	if (ep_priv->cm_nic != NULL) {
		err_ret = _gnix_cm_nic_free(ep_priv->cm_nic);
		if (err_ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
					"_gnix_cm_nic_free returned %s\n",
					fi_strerror(-err_ret));
		}
	}

	if (ep_priv->nic != NULL) {
		err_ret = _gnix_nic_free(ep_priv->nic);
		if (err_ret != FI_SUCCESS) {
			GNIX_WARN(FI_LOG_EP_CTRL,
					"_gnix_nic_free returned %s\n",
					fi_strerror(-err_ret));
		}
	}

	free(ep_priv);
	return ret;
}

static int __match_context(struct dlist_entry *item, const void *arg)
{
	struct gnix_fab_req *req;

	req = container_of(item, struct gnix_fab_req, dlist);

	return req->user_context == arg;
}

static inline struct gnix_fab_req *__find_tx_req(
		struct gnix_fid_ep *ep,
		void *context)
{
	struct gnix_fab_req *req = NULL;
	struct dlist_entry *entry;
	struct gnix_vc *vc;

	GNIX_DEBUG(FI_LOG_EP_CTRL, "searching VCs for the correct context to"
		   " cancel, context=%p", context);

	COND_ACQUIRE(ep->requires_lock, &ep->vc_lock);

	if (ep->av->type == FI_AV_TABLE) {
		GNIX_VECTOR_ITERATOR(ep->vc_table, iter);

		while ((vc = (struct gnix_vc *)
				_gnix_vec_iterator_next(&iter))) {
			entry = dlist_remove_first_match(&vc->tx_queue,
							 __match_context,
							 context);

			if (entry) {
				req = container_of(entry,
						   struct gnix_fab_req,
						   dlist);
				break;
			}
		}
	} else {
		GNIX_HASHTABLE_ITERATOR(ep->vc_ht, iter);

		while ((vc = _gnix_ht_iterator_next(&iter))) {
			entry = dlist_remove_first_match(&vc->tx_queue,
							 __match_context,
							 context);

			if (entry) {
				req = container_of(entry,
						   struct gnix_fab_req,
						   dlist);
				break;
			}
		}
	}

	COND_RELEASE(ep->requires_lock, &ep->vc_lock);

	return req;
}

static inline struct gnix_fab_req *__find_rx_req(
		struct gnix_fid_ep *ep,
		void *context)
{
	struct gnix_fab_req *req = NULL;

	COND_ACQUIRE(ep->requires_lock, &ep->vc_lock);
	req = _gnix_remove_req_by_context(&ep->posted_recv_queue, context);
	if (req) {
		COND_RELEASE(ep->requires_lock, &ep->vc_lock);
		return req;
	}

	req = _gnix_remove_req_by_context(&ep->tagged_posted_recv_queue,
			context);
	COND_RELEASE(ep->requires_lock, &ep->vc_lock);

	return req;
}

DIRECT_FN STATIC ssize_t gnix_ep_cancel(fid_t fid, void *context)
{
	int ret = FI_SUCCESS;
	struct gnix_fid_ep *ep;
	struct gnix_fab_req *req;
	struct gnix_fid_cq *err_cq = NULL;
	struct gnix_fid_cntr *err_cntr = NULL;
	void *addr;
	uint64_t tag, flags;
	size_t len;
	int is_send = 0;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);

	if (!ep->domain)
		return -FI_EDOMAIN;

	/* without context, we will have to find a request that matches
	 * a recv or send request. Try the send requests first.
	 */
	GNIX_INFO(FI_LOG_EP_CTRL, "looking for event to cancel\n");

	req = __find_tx_req(ep, context);
	if (!req) {
		req = __find_rx_req(ep, context);
		if (req) {
			err_cq = ep->recv_cq;
			err_cntr = ep->recv_cntr;
		}
	} else {
		is_send = 1;
		err_cq = ep->send_cq;
		err_cntr = ep->send_cntr;
	}
	GNIX_INFO(FI_LOG_EP_CTRL, "finished searching\n");

	if (!req)
		return -FI_ENOENT;

	if (err_cq) {
		/* add canceled event */
		if (!(req->type == GNIX_FAB_RQ_RDMA_READ ||
		      req->type == GNIX_FAB_RQ_RDMA_WRITE)) {
			if (!is_send) {
				addr = (void *) req->msg.recv_info[0].recv_addr;
				len = req->msg.cum_recv_len;
			} else {
				addr = (void *) req->msg.send_info[0].send_addr;
				len = req->msg.cum_send_len;
			}
			tag = req->msg.tag;
		} else {
			/* rma information */
			addr = (void *) req->rma.loc_addr;
			len = req->rma.len;
			tag = 0;
		}
		flags = req->flags;

		_gnix_cq_add_error(err_cq, context, flags, len, addr, 0 /* data */,
				tag, len, FI_ECANCELED, FI_ECANCELED, 0, 0);

	}

	if (err_cntr) {
		/* signal increase in cntr errs */
		_gnix_cntr_inc_err(err_cntr);
	}

	if (req->flags & FI_LOCAL_MR) {
		fi_close(&req->amo.loc_md->mr_fid.fid);
		req->flags &= ~FI_LOCAL_MR;
	}

	_gnix_fr_free(ep, req);

	return ret;
}

ssize_t gnix_cancel(fid_t fid, void *context)
{
	ssize_t ret;
	struct gnix_fid_ep *ep;
	struct gnix_fid_trx *trx_ep;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	switch (fid->fclass) {
	case FI_CLASS_EP:
		ret = gnix_ep_cancel(fid, context);
		break;

	case FI_CLASS_RX_CTX:
	case FI_CLASS_TX_CTX:
		trx_ep = container_of(fid, struct gnix_fid_trx, ep_fid);
		ep = trx_ep->ep;
		ret = gnix_ep_cancel(&ep->ep_fid.fid, context);
		break;
	/* not supported yet */
	case FI_CLASS_SRX_CTX:
	case FI_CLASS_STX_CTX:
		return -FI_ENOENT;

	default:
		GNIX_WARN(FI_LOG_EP_CTRL, "Invalid fid type\n");
		return -FI_EINVAL;
	}

	return ret;
}

static int
__gnix_ep_ops_get_val(struct fid *fid, ep_ops_val_t t, void *val)
{
	struct gnix_fid_ep *ep;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	assert(val);

	if (fid->fclass != FI_CLASS_EP) {
		GNIX_WARN(FI_LOG_DOMAIN, "Invalid ep\n");
		return -FI_EINVAL;
	}

	ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);

	switch (t) {
	case GNI_HASH_TAG_IMPL:
		*(uint32_t *)val = (ep->use_tag_hlist) ? 1 : 0;
		break;

	default:
		GNIX_WARN(FI_LOG_DOMAIN, ("Invalid dom_ops_val\n"));
		return -FI_EINVAL;
	}

	return FI_SUCCESS;
}

static int
__gnix_ep_ops_set_val(struct fid *fid, ep_ops_val_t t, void *val)
{
	struct gnix_fid_ep *ep;
	int v;
	int ret;
	int tag_type;

	GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	assert(val);

	if (fid->fclass != FI_CLASS_EP) {
		GNIX_WARN(FI_LOG_DOMAIN, "Invalid ep\n");
		return -FI_EINVAL;
	}

	ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);
	switch (t) {
	case GNI_HASH_TAG_IMPL:
		if (ep->tx_enabled || ep->rx_enabled) {
			GNIX_WARN(FI_LOG_EP_CTRL,
					"EP enabled, cannot modify tag matcher\n");
			return -FI_EINVAL;
		}

		v = *(uint32_t *) val;
		if ((v && !(ep->use_tag_hlist)) ||
				(!v && (ep->use_tag_hlist))) {
			ret = __destruct_tag_storages(ep);
			if (ret) {
				GNIX_FATAL(FI_LOG_EP_CTRL,
						"failed to destroy existing tag storage\n");
			}

			tag_type = (v) ? GNIX_TAG_HLIST : GNIX_TAG_LIST;

			ret = __init_tag_storages(ep, tag_type, 1);
			if (ret)
				return ret;

			ep->use_tag_hlist = v;
		}
		break;
	default:
		GNIX_WARN(FI_LOG_DOMAIN, ("Invalid dom_ops_val\n"));
		return -FI_EINVAL;
	}

	return FI_SUCCESS;
}

static struct fi_gni_ops_ep gnix_ops_ep = {
	.set_val = __gnix_ep_ops_set_val,
	.get_val = __gnix_ep_ops_get_val,
	.native_amo = __gnix_fabric_ops_native_amo
};

static int
gnix_ep_ops_open(struct fid *fid, const char *ops_name, uint64_t flags,
		     void **ops, void *context)
{
	int ret = FI_SUCCESS;

	if (strcmp(ops_name, FI_GNI_EP_OPS_1) == 0)
		*ops = &gnix_ops_ep;
	else
		ret = -FI_EINVAL;

	return ret;
}

DIRECT_FN STATIC int gnix_ep_getopt(fid_t fid, int level, int optname,
				    void *optval, size_t *optlen)
{
	struct gnix_fid_ep *gnix_ep;

	gnix_ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);

	switch (optname) {
	case FI_OPT_MIN_MULTI_RECV:
		*(size_t *)optval = gnix_ep->min_multi_recv;
		*optlen = sizeof(size_t);
		break;
	case FI_OPT_CM_DATA_SIZE:
		*(size_t *)optval = GNIX_CM_DATA_MAX_SIZE;
		*optlen = sizeof(size_t);
		break;
	default:
		return -FI_ENOPROTOOPT;
	}

	return 0;
}

int gnix_getopt(fid_t fid, int level, int optname,
				    void *optval, size_t *optlen)
{
        ssize_t ret;
        struct gnix_fid_ep *ep;
        struct gnix_fid_trx *trx_ep;

        GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	if (!fid || !optval || !optlen)
		return -FI_EINVAL;
	else if (level != FI_OPT_ENDPOINT)
		return -FI_ENOPROTOOPT;

        switch (fid->fclass) {
        case FI_CLASS_EP:
                ret = gnix_ep_getopt(fid, level, optname, optval, optlen);
                break;

        case FI_CLASS_RX_CTX:
        case FI_CLASS_TX_CTX:
                trx_ep = container_of(fid, struct gnix_fid_trx, ep_fid);
                ep = trx_ep->ep;
                ret = gnix_ep_getopt(&ep->ep_fid.fid, level, optname, optval,
                        optlen);
                break;
        /* not supported yet */
        case FI_CLASS_SRX_CTX:
        case FI_CLASS_STX_CTX:
                return -FI_ENOENT;

        default:
                GNIX_WARN(FI_LOG_EP_CTRL, "Invalid fid type\n");
                return -FI_EINVAL;
        }

        return ret;
}

DIRECT_FN STATIC int gnix_ep_setopt(fid_t fid, int level, int optname,
				    const void *optval, size_t optlen)
{
	struct gnix_fid_ep *gnix_ep;

	gnix_ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);

	switch (optname) {
	case FI_OPT_MIN_MULTI_RECV:
		if (optlen != sizeof(size_t))
			return -FI_EINVAL;
		/*
		 * see https://github.com/ofi-cray/libfabric-cray/issues/1120
		 */
		if (*(size_t *)optval == 0UL)
			return -FI_EINVAL;
		gnix_ep->min_multi_recv = *(size_t *)optval;
		break;
	default:
		return -FI_ENOPROTOOPT;
	}

	return 0;
}

int gnix_setopt(fid_t fid, int level, int optname,
				    const void *optval, size_t optlen)
{
        ssize_t ret;
        struct gnix_fid_ep *ep;
        struct gnix_fid_trx *trx_ep;

        GNIX_TRACE(FI_LOG_EP_CTRL, "\n");

	if (!fid || !optval)
		return -FI_EINVAL;
	else if (level != FI_OPT_ENDPOINT)
		return -FI_ENOPROTOOPT;

        switch (fid->fclass) {
        case FI_CLASS_EP:
                ret = gnix_ep_setopt(fid, level, optname, optval, optlen);
                break;

        case FI_CLASS_RX_CTX:
        case FI_CLASS_TX_CTX:
                trx_ep = container_of(fid, struct gnix_fid_trx, ep_fid);
                ep = trx_ep->ep;
                ret = gnix_ep_setopt(&ep->ep_fid.fid, level, optname, optval,
                        optlen);
                break;
        /* not supported yet */
        case FI_CLASS_SRX_CTX:
        case FI_CLASS_STX_CTX:
                return -FI_ENOENT;

        default:
                GNIX_WARN(FI_LOG_EP_CTRL, "Invalid fid type\n");
                return -FI_EINVAL;
        }

        return ret;
}

DIRECT_FN STATIC ssize_t gnix_ep_rx_size_left(struct fid_ep *ep)
{
	if (!ep) {
		return -FI_EINVAL;
	}

	struct gnix_fid_ep *ep_priv = container_of(ep,
						   struct gnix_fid_ep,
						   ep_fid);

	/* A little arbitrary... */
	if (ep_priv->int_tx_pool.enabled == false) {
		return -FI_EOPBADSTATE;
	}

	switch (ep->fid.fclass) {
	case FI_CLASS_EP:
		break;
	case FI_CLASS_RX_CTX:
	case FI_CLASS_SRX_CTX:
		break;
	default:
		GNIX_INFO(FI_LOG_EP_CTRL, "Invalid EP type\n");
		return -FI_EINVAL;
	}

	/* We can queue RXs indefinitely, so just return the default size. */
	return GNIX_RX_SIZE_DEFAULT;
}

DIRECT_FN STATIC ssize_t gnix_ep_tx_size_left(struct fid_ep *ep)
{
	if (!ep) {
		return -FI_EINVAL;
	}

	struct gnix_fid_ep *ep_priv = container_of(ep,
						   struct gnix_fid_ep,
						   ep_fid);

	/* A little arbitrary... */
	if (ep_priv->int_tx_pool.enabled == false) {
		return -FI_EOPBADSTATE;
	}

	switch (ep->fid.fclass) {
	case FI_CLASS_EP:
		break;
	case FI_CLASS_TX_CTX:
		break;
	default:
		GNIX_INFO(FI_LOG_EP_CTRL, "Invalid EP type\n");
		return -FI_EINVAL;
	}

	/* We can queue TXs indefinitely, so just return the default size. */
	return GNIX_TX_SIZE_DEFAULT;
}

__attribute__((unused))
DIRECT_FN STATIC int gnix_tx_context(struct fid_ep *ep, int index,
				     struct fi_tx_attr *attr,
				     struct fid_ep **tx_ep, void *context)
{
	return -FI_ENOSYS;
}

__attribute__((unused))
DIRECT_FN STATIC int gnix_rx_context(struct fid_ep *ep, int index,
				     struct fi_rx_attr *attr,
				     struct fid_ep **rx_ep, void *context)
{
	return -FI_ENOSYS;
}

/*******************************************************************************
 * FI_OPS_* data structures.
 ******************************************************************************/

static struct fi_ops gnix_ep_fi_ops = {
	.size = sizeof(struct fi_ops),
	.close = gnix_ep_close,
	.bind = gnix_ep_bind,
	.control = gnix_ep_control,
	.ops_open = gnix_ep_ops_open,
};

static struct fi_ops_ep gnix_ep_ops = {
	.size = sizeof(struct fi_ops_ep),
	.cancel = gnix_cancel,
	.getopt = gnix_getopt,
	.setopt = gnix_setopt,
	.tx_ctx = fi_no_tx_ctx,
	.rx_ctx = fi_no_rx_ctx,
	.rx_size_left = gnix_ep_rx_size_left,
	.tx_size_left = gnix_ep_tx_size_left,
};

static struct fi_ops_msg gnix_ep_msg_ops = {
	.size = sizeof(struct fi_ops_msg),
	.recv = gnix_ep_recv,
	.recvv = gnix_ep_recvv,
	.recvmsg = gnix_ep_recvmsg,
	.send = gnix_ep_send,
	.sendv = gnix_ep_sendv,
	.sendmsg = gnix_ep_sendmsg,
	.inject = gnix_ep_msg_inject,
	.senddata = gnix_ep_senddata,
	.injectdata = gnix_ep_msg_injectdata,
};

static struct fi_ops_rma gnix_ep_rma_ops = {
	.size = sizeof(struct fi_ops_rma),
	.read = gnix_ep_read,
	.readv = gnix_ep_readv,
	.readmsg = gnix_ep_readmsg,
	.write = gnix_ep_write,
	.writev = gnix_ep_writev,
	.writemsg = gnix_ep_writemsg,
	.inject = gnix_ep_rma_inject,
	.writedata = gnix_ep_writedata,
	.injectdata = gnix_ep_rma_injectdata,
};

struct fi_ops_tagged gnix_ep_tagged_ops = {
	.size = sizeof(struct fi_ops_tagged),
	.recv = gnix_ep_trecv,
	.recvv = gnix_ep_trecvv,
	.recvmsg = gnix_ep_trecvmsg,
	.send = gnix_ep_tsend,
	.sendv = gnix_ep_tsendv,
	.sendmsg = gnix_ep_tsendmsg,
	.inject = gnix_ep_tinject,
	.senddata = gnix_ep_tsenddata,
	.injectdata = gnix_ep_tinjectdata,
};

struct fi_ops_atomic gnix_ep_atomic_ops = {
	.size = sizeof(struct fi_ops_atomic),
	.write = gnix_ep_atomic_write,
	.writev = gnix_ep_atomic_writev,
	.writemsg = gnix_ep_atomic_writemsg,
	.inject = gnix_ep_atomic_inject,
	.readwrite = gnix_ep_atomic_readwrite,
	.readwritev = gnix_ep_atomic_readwritev,
	.readwritemsg = gnix_ep_atomic_readwritemsg,
	.compwrite = gnix_ep_atomic_compwrite,
	.compwritev = gnix_ep_atomic_compwritev,
	.compwritemsg = gnix_ep_atomic_compwritemsg,
	.writevalid = gnix_ep_atomic_valid,
	.readwritevalid = gnix_ep_fetch_atomic_valid,
	.compwritevalid = gnix_ep_cmp_atomic_valid,
};