Subject: [ofa-general] [PATCH v4 06/14] QLogic VNIC: IB core stack interaction

From: Ramachandra K <[email-masked]>
Date: Tue, 10 Jun 2008 17:05:16 -0400

From: Ramachandra K <[email-masked]>

The patch implements the interaction of the QLogic VNIC driver with
the underlying core infiniband stack.

Signed-off-by: Ramachandra K <[email-masked]>
Signed-off-by: Poornima Kamath <[email-masked]>
Signed-off-by: Amar Mudrankit <[email-masked]>
---

 drivers/infiniband/ulp/qlgc_vnic/vnic_ib.c | 1057 ++++++++++++++++++++++++++++
 drivers/infiniband/ulp/qlgc_vnic/vnic_ib.h |  207 +++++
 2 files changed, 1264 insertions(+), 0 deletions(-)
 create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_ib.c
 create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_ib.h

diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.c b/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.c
new file mode 100644
index 0000000..1957e90
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.c
@@ -0,0 +1,1057 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc.  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/string.h>
+#include <linux/random.h>
+#include <linux/netdevice.h>
+#include <linux/list.h>
+
+#include "vnic_util.h"
+#include "vnic_data.h"
+#include "vnic_config.h"
+#include "vnic_ib.h"
+#include "vnic_viport.h"
+#include "vnic_sys.h"
+#include "vnic_main.h"
+#include "vnic_stats.h"
+
+static int vnic_ib_inited;
+static void vnic_add_one(struct ib_device *device);
+static void vnic_remove_one(struct ib_device *device);
+static int vnic_defer_completion(void *ptr);
+
+static int vnic_ib_mc_init_qp(struct mc_data *mc_data,
+		struct vnic_ib_config *config,
+		struct ib_pd *pd,
+		struct viport_config *viport_config);
+
+static struct ib_client vnic_client = {
+	.name = "vnic",
+	.add = vnic_add_one,
+	.remove = vnic_remove_one
+};
+
+struct ib_sa_client vnic_sa_client;
+
+int vnic_ib_init(void)
+{
+	int ret = -1;
+
+	IB_FUNCTION("vnic_ib_init()\n");
+
+	/* class has to be registered before
+	 * calling ib_register_client() because, that call
+	 * will trigger vnic_add_port() which will register
+	 * class_device for the port with the parent class
+	 * as vnic_class
+	 */
+	ret = class_register(&vnic_class);
+	if (ret) {
+		printk(KERN_ERR PFX "couldn't register class"
+		       " infiniband_qlgc_vnic; error %d", ret);
+		goto out;
+	}
+
+	ib_sa_register_client(&vnic_sa_client);
+	ret = ib_register_client(&vnic_client);
+	if (ret) {
+		printk(KERN_ERR PFX "couldn't register IB client;"
+		       " error %d", ret);
+		goto err_ib_reg;
+	}
+
+	interface_dev.dev.class = &vnic_class;
+	interface_dev.dev.release = vnic_release_dev;
+	snprintf(interface_dev.dev.bus_id,
+		 BUS_ID_SIZE, "interfaces");
+	init_completion(&interface_dev.released);
+	ret = device_register(&interface_dev.dev);
+	if (ret) {
+		printk(KERN_ERR PFX "couldn't register class interfaces;"
+		       " error %d", ret);
+		goto err_class_dev;
+	}
+
+	ret = device_create_file(&interface_dev.dev,
+				       &dev_attr_delete_vnic);
+	if (ret) {
+		printk(KERN_ERR PFX "couldn't create class file"
+		       " 'delete_vnic'; error %d", ret);
+		goto err_class_file;
+	}
+
+	ret = device_create_file(&interface_dev.dev,
+				       &dev_attr_create_vnic);
+	if (ret) {
+		printk(KERN_ERR PFX "couldn't create class file"
+		       " 'create_vnic'; error %d", ret);
+		goto err_create_vnic;
+	}
+
+	vnic_ib_inited = 1;
+
+	return ret;
+err_create_vnic:
+	device_remove_file(&interface_dev.dev, &dev_attr_delete_vnic);
+err_class_file:
+	device_unregister(&interface_dev.dev);
+err_class_dev:
+	ib_unregister_client(&vnic_client);
+err_ib_reg:
+	ib_sa_unregister_client(&vnic_sa_client);
+	class_unregister(&vnic_class);
+out:
+	return ret;
+}
+
+static struct vnic_ib_port *vnic_add_port(struct vnic_ib_device *device,
+					  u8 port_num)
+{
+	struct vnic_ib_port *port;
+
+	port = kzalloc(sizeof *port, GFP_KERNEL);
+	if (!port)
+		return NULL;
+
+	init_completion(&port->pdev_info.released);
+	port->dev = device;
+	port->port_num = port_num;
+
+	port->pdev_info.dev.class = &vnic_class;
+	port->pdev_info.dev.parent = NULL;
+	port->pdev_info.dev.release = vnic_release_dev;
+	snprintf(port->pdev_info.dev.bus_id, BUS_ID_SIZE,
+		 "vnic-%s-%d", device->dev->name, port_num);
+
+	if (device_register(&port->pdev_info.dev))
+		goto free_port;
+
+	if (device_create_file(&port->pdev_info.dev,
+				     &dev_attr_create_primary))
+		goto err_class;
+	if (device_create_file(&port->pdev_info.dev,
+				     &dev_attr_create_secondary))
+		goto err_class;
+
+	return port;
+err_class:
+	device_unregister(&port->pdev_info.dev);
+free_port:
+	kfree(port);
+
+	return NULL;
+}
+
+static void vnic_add_one(struct ib_device *device)
+{
+	struct vnic_ib_device *vnic_dev;
+	struct vnic_ib_port *port;
+	int s, e, p;
+
+	vnic_dev = kmalloc(sizeof *vnic_dev, GFP_KERNEL);
+	if (!vnic_dev)
+		return;
+
+	vnic_dev->dev = device;
+	INIT_LIST_HEAD(&vnic_dev->port_list);
+
+	if (device->node_type == RDMA_NODE_IB_SWITCH) {
+		s = 0;
+		e = 0;
+
+	} else {
+		s = 1;
+		e = device->phys_port_cnt;
+
+	}
+
+	for (p = s; p <= e; p++) {
+		port = vnic_add_port(vnic_dev, p);
+		if (port)
+			list_add_tail(&port->list, &vnic_dev->port_list);
+	}
+
+	ib_set_client_data(device, &vnic_client, vnic_dev);
+
+}
+
+static void vnic_remove_one(struct ib_device *device)
+{
+	struct vnic_ib_device *vnic_dev;
+	struct vnic_ib_port *port, *tmp_port;
+
+	vnic_dev = ib_get_client_data(device, &vnic_client);
+	list_for_each_entry_safe(port, tmp_port,
+				 &vnic_dev->port_list, list) {
+		device_unregister(&port->pdev_info.dev);
+		/*
+		 * wait for sysfs entries to go away, so that no new vnics
+		 * are created
+		 */
+		wait_for_completion(&port->pdev_info.released);
+		kfree(port);
+
+	}
+	kfree(vnic_dev);
+
+	/* TODO Only those vnic interfaces associated with
+	 * the HCA whose remove event is called should be freed
+	 * Currently all the vnic interfaces are freed
+	 */
+
+	while (!list_empty(&vnic_list)) {
+		struct vnic *vnic =
+		    list_entry(vnic_list.next, struct vnic, list_ptrs);
+		vnic_free(vnic);
+	}
+
+	vnic_npevent_cleanup();
+	viport_cleanup();
+
+}
+
+void vnic_ib_cleanup(void)
+{
+	IB_FUNCTION("vnic_ib_cleanup()\n");
+
+	if (!vnic_ib_inited)
+		return;
+
+	device_remove_file(&interface_dev.dev, &dev_attr_delete_vnic);
+	device_remove_file(&interface_dev.dev, &dev_attr_create_vnic);
+
+	device_unregister(&interface_dev.dev);
+	wait_for_completion(&interface_dev.released);
+
+	ib_unregister_client(&vnic_client);
+	ib_sa_unregister_client(&vnic_sa_client);
+	class_unregister(&vnic_class);
+}
+
+static void vnic_path_rec_completion(int status,
+				     struct ib_sa_path_rec *pathrec,
+				     void *context)
+{
+	struct vnic_ib_path_info *p = context;
+	p->status = status;
+	if (!status)
+		p->path = *pathrec;
+
+	complete(&p->done);
+}
+
+int vnic_ib_get_path(struct netpath *netpath, struct vnic *vnic)
+{
+	struct viport_config *config = netpath->viport->config;
+	int ret = 0;
+
+	init_completion(&config->path_info.done);
+	IB_INFO("Using SA path rec get time out value of %d\n",
+	       config->sa_path_rec_get_timeout);
+	config->path_info.path_query_id =
+			 ib_sa_path_rec_get(&vnic_sa_client,
+					    config->ibdev,
+					    config->port,
+					    &config->path_info.path,
+					    IB_SA_PATH_REC_DGID      |
+					    IB_SA_PATH_REC_SGID      |
+					    IB_SA_PATH_REC_NUMB_PATH |
+					    IB_SA_PATH_REC_PKEY,
+					    config->sa_path_rec_get_timeout,
+					    GFP_KERNEL,
+					    vnic_path_rec_completion,
+					    &config->path_info,
+					    &config->path_info.path_query);
+
+	if (config->path_info.path_query_id < 0) {
+		IB_ERROR("SA path record query failed; error %d\n",
+			 config->path_info.path_query_id);
+		ret = config->path_info.path_query_id;
+		goto out;
+	}
+
+	wait_for_completion(&config->path_info.done);
+
+	if (config->path_info.status < 0) {
+		printk(KERN_WARNING PFX "connection not available to dgid "
+		       "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[0]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[2]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[4]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[6]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[8]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[10]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[12]),
+		       (int)be16_to_cpu(*(__be16 *) &config->path_info.path.
+					dgid.raw[14]));
+
+		if (config->path_info.status == -ETIMEDOUT)
+			printk(KERN_INFO " path query timed out\n");
+		else if (config->path_info.status == -EIO)
+			printk(KERN_INFO " path query sending error\n");
+		else
+			printk(KERN_INFO " error %d\n",
+			       config->path_info.status);
+
+		ret = config->path_info.status;
+	}
+out:
+	if (ret)
+		netpath_timer(netpath, vnic->config->no_path_timeout);
+
+	return ret;
+}
+
+static inline void vnic_ib_handle_completions(struct ib_wc *wc,
+					      struct vnic_ib_conn *ib_conn,
+					      u32 *comp_num,
+					      cycles_t *comp_time)
+{
+	struct io *io;
+
+	io = (struct io *)(wc->wr_id);
+	vnic_ib_comp_stats(ib_conn, comp_num);
+	if (wc->status) {
+		IB_INFO("completion error  wc.status %d"
+			 " wc.opcode %d vendor err 0x%x\n",
+			  wc->status, wc->opcode, wc->vendor_err);
+	} else if (io) {
+		vnic_ib_io_stats(io, ib_conn, *comp_time);
+		if (io->type == RECV_UD) {
+			struct ud_recv_io *recv_io =
+				container_of(io, struct ud_recv_io, io);
+			recv_io->len = wc->byte_len;
+		}
+		if (io->routine)
+			(*io->routine) (io);
+	}
+}
+
+static void ib_qp_event(struct ib_event *event, void *context)
+{
+	IB_ERROR("QP event %d\n", event->event);
+}
+
+static void vnic_ib_completion(struct ib_cq *cq, void *ptr)
+{
+	struct vnic_ib_conn *ib_conn = ptr;
+	unsigned long	 flags;
+	int compl_received;
+	struct ib_wc wc;
+	cycles_t  comp_time;
+	u32  comp_num = 0;
+
+	/* for multicast, cm_id is NULL, so skip that test */
+	if (ib_conn->cm_id &&
+	    (ib_conn->state != IB_CONN_CONNECTED))
+		return;
+
+	/* Check if completion processing is taking place in thread
+	 * If not then process completions in this handler,
+	 * else set compl_received if not set, to indicate that
+	 * there are more completions to process in thread.
+	 */
+
+	spin_lock_irqsave(&ib_conn->compl_received_lock, flags);
+	compl_received = ib_conn->compl_received;
+	spin_unlock_irqrestore(&ib_conn->compl_received_lock, flags);
+
+	if (ib_conn->in_thread || compl_received) {
+		if (!compl_received) {
+			spin_lock_irqsave(&ib_conn->compl_received_lock, flags);
+			ib_conn->compl_received = 1;
+			spin_unlock_irqrestore(&ib_conn->compl_received_lock,
+									flags);
+		}
+		wake_up(&(ib_conn->callback_wait_queue));
+	} else {
+		vnic_ib_note_comptime_stats(&comp_time);
+		vnic_ib_callback_stats(ib_conn);
+		ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
+		while (ib_poll_cq(cq, 1, &wc) > 0) {
+			vnic_ib_handle_completions(&wc, ib_conn, &comp_num,
+								 &comp_time);
+			if (ib_conn->cm_id &&
+				 ib_conn->state != IB_CONN_CONNECTED)
+				break;
+
+			/* If we get more completions than the completion limit
+			 * defer completion to the thread
+			 */
+			if ((!ib_conn->in_thread) &&
+			    (comp_num >= ib_conn->ib_config->completion_limit)) {
+				ib_conn->in_thread = 1;
+				spin_lock_irqsave(
+					&ib_conn->compl_received_lock, flags);
+				ib_conn->compl_received = 1;
+				spin_unlock_irqrestore(
+					&ib_conn->compl_received_lock, flags);
+				wake_up(&(ib_conn->callback_wait_queue));
+				break;
+			}
+
+		}
+		vnic_ib_maxio_stats(ib_conn, comp_num);
+	}
+}
+
+static int vnic_ib_mod_qp_to_rts(struct ib_cm_id *cm_id,
+			     struct vnic_ib_conn *ib_conn)
+{
+	int attr_mask = 0;
+	int ret;
+	struct ib_qp_attr *qp_attr = NULL;
+
+	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
+	if (!qp_attr)
+		return -ENOMEM;
+
+	qp_attr->qp_state = IB_QPS_RTR;
+
+	ret = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask);
+	if (ret)
+		goto out;
+
+	ret = ib_modify_qp(ib_conn->qp, qp_attr, attr_mask);
+	if (ret)
+		goto out;
+
+	IB_INFO("QP RTR\n");
+
+	qp_attr->qp_state = IB_QPS_RTS;
+
+	ret = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask);
+	if (ret)
+		goto out;
+
+	ret = ib_modify_qp(ib_conn->qp, qp_attr, attr_mask);
+	if (ret)
+		goto out;
+
+	IB_INFO("QP RTS\n");
+
+	ret = ib_send_cm_rtu(cm_id, NULL, 0);
+	if (ret)
+		goto out;
+out:
+	kfree(qp_attr);
+	return ret;
+}
+
+int vnic_ib_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event)
+{
+	struct vnic_ib_conn *ib_conn = cm_id->context;
+	struct viport *viport = ib_conn->viport;
+	int err = 0;
+
+	switch (event->event) {
+	case IB_CM_REQ_ERROR:
+		IB_ERROR("sending CM REQ failed\n");
+		err = 1;
+		viport->retry = 1;
+		break;
+	case IB_CM_REP_RECEIVED:
+		IB_INFO("CM REP recvd\n");
+		if (vnic_ib_mod_qp_to_rts(cm_id, ib_conn))
+			err = 1;
+		else {
+			ib_conn->state = IB_CONN_CONNECTED;
+			vnic_ib_connected_time_stats(ib_conn);
+			IB_INFO("RTU SENT\n");
+		}
+		break;
+	case IB_CM_REJ_RECEIVED:
+		printk(KERN_ERR PFX " CM rejected control connection\n");
+		if (event->param.rej_rcvd.reason ==
+		    IB_CM_REJ_INVALID_SERVICE_ID)
+			printk(KERN_ERR "reason: invalid service ID. "
+			       "IOCGUID value specified may be incorrect\n");
+		else
+			printk(KERN_ERR "reason code : 0x%x\n",
+			       event->param.rej_rcvd.reason);
+
+		err = 1;
+		viport->retry = 1;
+		break;
+	case IB_CM_MRA_RECEIVED:
+		IB_INFO("CM MRA received\n");
+		break;
+
+	case IB_CM_DREP_RECEIVED:
+		IB_INFO("CM DREP recvd\n");
+		ib_conn->state = IB_CONN_DISCONNECTED;
+		break;
+
+	case IB_CM_TIMEWAIT_EXIT:
+		IB_ERROR("CM timewait exit\n");
+		err = 1;
+		break;
+
+	default:
+		IB_INFO("unhandled CM event %d\n", event->event);
+		break;
+
+	}
+
+	if (err) {
+		ib_conn->state = IB_CONN_DISCONNECTED;
+		viport_failure(viport);
+	}
+
+	viport_kick(viport);
+	return 0;
+}
+
+
+int vnic_ib_cm_connect(struct vnic_ib_conn *ib_conn)
+{
+	struct ib_cm_req_param	*req = NULL;
+	struct viport		*viport;
+	int 			ret = -1;
+
+	if (!vnic_ib_conn_initted(ib_conn)) {
+		IB_ERROR("IB Connection out of state for CM connect (%d)\n",
+			 ib_conn->state);
+		return -EINVAL;
+	}
+
+	vnic_ib_conntime_stats(ib_conn);
+	req = kzalloc(sizeof *req, GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	viport	= ib_conn->viport;
+
+	req->primary_path	= &viport->config->path_info.path;
+	req->alternate_path	= NULL;
+	req->qp_num		= ib_conn->qp->qp_num;
+	req->qp_type		= ib_conn->qp->qp_type;
+	req->service_id 	= ib_conn->ib_config->service_id;
+	req->private_data	= &ib_conn->ib_config->conn_data;
+	req->private_data_len	= sizeof(struct vnic_connection_data);
+	req->flow_control	= 1;
+
+	get_random_bytes(&req->starting_psn, 4);
+	req->starting_psn &= 0xffffff;
+
+	/*
+	 * Both responder_resources and initiator_depth are set to zero
+	 * as we do not need RDMA read.
+	 *
+	 * They also must be set to zero, otherwise data connections
+	 * are rejected by VEx.
+	 */
+	req->responder_resources 	= 0;
+	req->initiator_depth		= 0;
+	req->remote_cm_response_timeout = 20;
+	req->local_cm_response_timeout  = 20;
+	req->retry_count		= ib_conn->ib_config->retry_count;
+	req->rnr_retry_count		= ib_conn->ib_config->rnr_retry_count;
+	req->max_cm_retries		= 15;
+
+	ib_conn->state = IB_CONN_CONNECTING;
+
+	ret = ib_send_cm_req(ib_conn->cm_id, req);
+
+	kfree(req);
+
+	if (ret) {
+		IB_ERROR("CM REQ sending failed; error %d \n", ret);
+		ib_conn->state = IB_CONN_DISCONNECTED;
+	}
+
+	return ret;
+}
+
+static int vnic_ib_init_qp(struct vnic_ib_conn *ib_conn,
+			   struct vnic_ib_config *config,
+			   struct ib_pd	*pd,
+			   struct viport_config *viport_config)
+{
+	struct ib_qp_init_attr	*init_attr;
+	struct ib_qp_attr	*attr;
+	int			ret;
+
+	init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL);
+	if (!init_attr)
+		return -ENOMEM;
+
+	init_attr->event_handler	= ib_qp_event;
+	init_attr->cap.max_send_wr	= config->num_sends;
+	init_attr->cap.max_recv_wr	= config->num_recvs;
+	init_attr->cap.max_recv_sge	= config->recv_scatter;
+	init_attr->cap.max_send_sge	= config->send_gather;
+	init_attr->sq_sig_type		= IB_SIGNAL_ALL_WR;
+	init_attr->qp_type		= IB_QPT_RC;
+	init_attr->send_cq		= ib_conn->cq;
+	init_attr->recv_cq		= ib_conn->cq;
+
+	ib_conn->qp = ib_create_qp(pd, init_attr);
+
+	if (IS_ERR(ib_conn->qp)) {
+		ret = -1;
+		IB_ERROR("could not create QP\n");
+		goto free_init_attr;
+	}
+
+	attr = kmalloc(sizeof *attr, GFP_KERNEL);
+	if (!attr) {
+		ret = -ENOMEM;
+		goto destroy_qp;
+	}
+
+	ret = ib_find_pkey(viport_config->ibdev, viport_config->port,
+			  be16_to_cpu(viport_config->path_info.path.pkey),
+			  &attr->pkey_index);
+	if (ret) {
+		printk(KERN_WARNING PFX "ib_find_pkey() failed; "
+		       "error %d\n", ret);
+		goto freeattr;
+	}
+
+	attr->qp_state		= IB_QPS_INIT;
+	attr->qp_access_flags	= IB_ACCESS_REMOTE_WRITE;
+	attr->port_num		= viport_config->port;
+
+	ret = ib_modify_qp(ib_conn->qp, attr,
+			   IB_QP_STATE |
+			   IB_QP_PKEY_INDEX |
+			   IB_QP_ACCESS_FLAGS | IB_QP_PORT);
+	if (ret) {
+		printk(KERN_WARNING PFX "could not modify QP; error %d \n",
+		       ret);
+		goto freeattr;
+	}
+
+	kfree(attr);
+	kfree(init_attr);
+	return ret;
+
+freeattr:
+	kfree(attr);
+destroy_qp:
+	ib_destroy_qp(ib_conn->qp);
+free_init_attr:
+	kfree(init_attr);
+	return ret;
+}
+
+int vnic_ib_conn_init(struct vnic_ib_conn *ib_conn, struct viport *viport,
+		      struct ib_pd *pd, struct vnic_ib_config *config)
+{
+	struct viport_config	*viport_config = viport->config;
+	int		ret = -1;
+	unsigned int	cq_size = config->num_sends + config->num_recvs;
+
+
+	if (!vnic_ib_conn_uninitted(ib_conn)) {
+		IB_ERROR("IB Connection out of state for init (%d)\n",
+			 ib_conn->state);
+		return -EINVAL;
+	}
+
+	ib_conn->cq = ib_create_cq(viport_config->ibdev, vnic_ib_completion,
+#ifdef BUILD_FOR_OFED_1_2
+				   NULL, ib_conn, cq_size);
+#else
+				   NULL, ib_conn, cq_size, 0);
+#endif
+	if (IS_ERR(ib_conn->cq)) {
+		IB_ERROR("could not create CQ\n");
+		goto out;
+	}
+
+	IB_INFO("cq created %p %d\n", ib_conn->cq, cq_size);
+	ib_req_notify_cq(ib_conn->cq, IB_CQ_NEXT_COMP);
+	init_waitqueue_head(&(ib_conn->callback_wait_queue));
+	init_completion(&(ib_conn->callback_thread_exit));
+
+	spin_lock_init(&ib_conn->compl_received_lock);
+
+	ib_conn->callback_thread = kthread_run(vnic_defer_completion, ib_conn,
+						"qlgc_vnic_def_compl");
+	if (IS_ERR(ib_conn->callback_thread)) {
+		IB_ERROR("Could not create vnic_callback_thread;"
+			" error %d\n", (int) PTR_ERR(ib_conn->callback_thread));
+		ib_conn->callback_thread = NULL;
+		goto destroy_cq;
+	}
+
+	ret = vnic_ib_init_qp(ib_conn, config, pd, viport_config);
+
+	if (ret)
+		goto destroy_thread;
+
+	spin_lock_init(&ib_conn->conn_lock);
+	ib_conn->state = IB_CONN_INITTED;
+
+	return ret;
+
+destroy_thread:
+	vnic_completion_cleanup(ib_conn);
+destroy_cq:
+	ib_destroy_cq(ib_conn->cq);
+out:
+	return ret;
+}
+
+int vnic_ib_post_recv(struct vnic_ib_conn *ib_conn, struct io *io)
+{
+	cycles_t		post_time;
+	struct ib_recv_wr	*bad_wr;
+	int			ret = -1;
+	unsigned long		flags;
+
+	IB_FUNCTION("vnic_ib_post_recv()\n");
+
+	spin_lock_irqsave(&ib_conn->conn_lock, flags);
+
+	if (!vnic_ib_conn_initted(ib_conn) &&
+	    !vnic_ib_conn_connected(ib_conn)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	vnic_ib_pre_rcvpost_stats(ib_conn, io, &post_time);
+	io->type = RECV;
+	ret = ib_post_recv(ib_conn->qp, &io->rwr, &bad_wr);
+	if (ret) {
+		IB_ERROR("error in posting rcv wr; error %d\n", ret);
+		ib_conn->state = IB_CONN_ERRORED;
+		goto out;
+	}
+
+	vnic_ib_post_rcvpost_stats(ib_conn, post_time);
+out:
+	spin_unlock_irqrestore(&ib_conn->conn_lock, flags);
+	return ret;
+
+}
+
+int vnic_ib_post_send(struct vnic_ib_conn *ib_conn, struct io *io)
+{
+	cycles_t		post_time;
+	unsigned long		flags;
+	struct ib_send_wr	*bad_wr;
+	int			ret = -1;
+
+	IB_FUNCTION("vnic_ib_post_send()\n");
+
+	spin_lock_irqsave(&ib_conn->conn_lock, flags);
+	if (!vnic_ib_conn_connected(ib_conn)) {
+		IB_ERROR("IB Connection out of state for"
+			 " posting sends (%d)\n", ib_conn->state);
+		goto out;
+	}
+
+	vnic_ib_pre_sendpost_stats(io, &post_time);
+	if (io->swr.opcode == IB_WR_RDMA_WRITE)
+		io->type = RDMA;
+	else
+		io->type = SEND;
+
+	ret = ib_post_send(ib_conn->qp, &io->swr, &bad_wr);
+	if (ret) {
+		IB_ERROR("error in posting send wr; error %d\n", ret);
+		ib_conn->state = IB_CONN_ERRORED;
+		goto out;
+	}
+
+	vnic_ib_post_sendpost_stats(ib_conn, io, post_time);
+out:
+	spin_unlock_irqrestore(&ib_conn->conn_lock, flags);
+	return ret;
+}
+
+static int vnic_defer_completion(void *ptr)
+{
+	struct vnic_ib_conn *ib_conn = ptr;
+	struct ib_wc wc;
+	struct ib_cq *cq = ib_conn->cq;
+	cycles_t 	 comp_time;
+	u32              comp_num = 0;
+	unsigned long	flags;
+
+	while (!ib_conn->callback_thread_end) {
+		wait_event_interruptible(ib_conn->callback_wait_queue,
+					 ib_conn->compl_received ||
+					 ib_conn->callback_thread_end);
+		ib_conn->in_thread = 1;
+		spin_lock_irqsave(&ib_conn->compl_received_lock, flags);
+		ib_conn->compl_received = 0;
+		spin_unlock_irqrestore(&ib_conn->compl_received_lock, flags);
+		if (ib_conn->cm_id &&
+		    ib_conn->state != IB_CONN_CONNECTED)
+			goto out_thread;
+
+		vnic_ib_note_comptime_stats(&comp_time);
+		vnic_ib_callback_stats(ib_conn);
+		ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
+		while (ib_poll_cq(cq, 1, &wc) > 0) {
+			vnic_ib_handle_completions(&wc, ib_conn, &comp_num,
+								 &comp_time);
+			if (ib_conn->cm_id &&
+				 ib_conn->state != IB_CONN_CONNECTED)
+				break;
+		}
+		vnic_ib_maxio_stats(ib_conn, comp_num);
+out_thread:
+		ib_conn->in_thread = 0;
+	}
+	complete_and_exit(&(ib_conn->callback_thread_exit), 0);
+	return 0;
+}
+
+void vnic_completion_cleanup(struct vnic_ib_conn *ib_conn)
+{
+	if (ib_conn->callback_thread) {
+		ib_conn->callback_thread_end = 1;
+		wake_up(&(ib_conn->callback_wait_queue));
+		wait_for_completion(&(ib_conn->callback_thread_exit));
+		ib_conn->callback_thread = NULL;
+	}
+}
+
+int vnic_ib_mc_init(struct mc_data *mc_data, struct viport *viport,
+		      struct ib_pd *pd, struct vnic_ib_config *config)
+{
+	struct viport_config	*viport_config = viport->config;
+	int		ret = -1;
+	unsigned int	cq_size = config->num_recvs; /* recvs only */
+
+	IB_FUNCTION("vnic_ib_mc_init\n");
+
+	mc_data->ib_conn.cq = ib_create_cq(viport_config->ibdev, vnic_ib_completion,
+#ifdef BUILD_FOR_OFED_1_2
+				   NULL, &mc_data->ib_conn, cq_size);
+#else
+				   NULL, &mc_data->ib_conn, cq_size, 0);
+#endif
+	if (IS_ERR(mc_data->ib_conn.cq)) {
+		IB_ERROR("ib_create_cq failed\n");
+		goto out;
+	}
+	IB_INFO("mc cq created %p %d\n", mc_data->ib_conn.cq, cq_size);
+
+	ret = ib_req_notify_cq(mc_data->ib_conn.cq, IB_CQ_NEXT_COMP);
+	if (ret) {
+		IB_ERROR("ib_req_notify_cq failed %x \n", ret);
+		goto destroy_cq;
+	}
+
+	init_waitqueue_head(&(mc_data->ib_conn.callback_wait_queue));
+	init_completion(&(mc_data->ib_conn.callback_thread_exit));
+
+	spin_lock_init(&mc_data->ib_conn.compl_received_lock);
+	mc_data->ib_conn.callback_thread = kthread_run(vnic_defer_completion,
+							&mc_data->ib_conn,
+							"qlgc_vnic_mc_def_compl");
+	if (IS_ERR(mc_data->ib_conn.callback_thread)) {
+		IB_ERROR("Could not create vnic_callback_thread for MULTICAST;"
+			" error %d\n",
+			(int) PTR_ERR(mc_data->ib_conn.callback_thread));
+		mc_data->ib_conn.callback_thread = NULL;
+		goto destroy_cq;
+	}
+	IB_INFO("callback_thread created\n");
+
+	ret = vnic_ib_mc_init_qp(mc_data, config, pd, viport_config);
+	if (ret)
+		goto destroy_thread;
+
+	spin_lock_init(&mc_data->ib_conn.conn_lock);
+	mc_data->ib_conn.state = IB_CONN_INITTED; /* stays in this state */
+
+	return ret;
+
+destroy_thread:
+	vnic_completion_cleanup(&mc_data->ib_conn);
+destroy_cq:
+	ib_destroy_cq(mc_data->ib_conn.cq);
+	mc_data->ib_conn.cq = (struct ib_cq *)ERR_PTR(-EINVAL);
+out:
+	return ret;
+}
+
+static int vnic_ib_mc_init_qp(struct mc_data *mc_data,
+			   struct vnic_ib_config *config,
+			   struct ib_pd	*pd,
+			   struct viport_config *viport_config)
+{
+	struct ib_qp_init_attr	*init_attr;
+	struct ib_qp_attr	*qp_attr;
+	int			ret;
+
+	IB_FUNCTION("vnic_ib_mc_init_qp\n");
+
+	if (!mc_data->ib_conn.cq) {
+		IB_ERROR("cq is null\n");
+		return -ENOMEM;
+	}
+
+	init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL);
+	if (!init_attr) {
+		IB_ERROR("failed to alloc init_attr\n");
+		return -ENOMEM;
+	}
+
+	init_attr->cap.max_recv_wr	= config->num_recvs;
+	init_attr->cap.max_send_wr	= 1;
+	init_attr->cap.max_recv_sge	= 2;
+	init_attr->cap.max_send_sge	= 1;
+
+	/* Completion for all work requests. */
+	init_attr->sq_sig_type		= IB_SIGNAL_ALL_WR;
+
+	init_attr->qp_type		= IB_QPT_UD;
+
+	init_attr->send_cq		= mc_data->ib_conn.cq;
+	init_attr->recv_cq		= mc_data->ib_conn.cq;
+
+	IB_INFO("creating qp %d \n", config->num_recvs);
+
+	mc_data->ib_conn.qp = ib_create_qp(pd, init_attr);
+
+	if (IS_ERR(mc_data->ib_conn.qp)) {
+		ret = -1;
+		IB_ERROR("could not create QP\n");
+		goto free_init_attr;
+	}
+
+	qp_attr = kzalloc(sizeof *qp_attr, GFP_KERNEL);
+	if (!qp_attr) {
+		ret = -ENOMEM;
+		goto destroy_qp;
+	}
+
+	qp_attr->qp_state	= IB_QPS_INIT;
+	qp_attr->port_num	= viport_config->port;
+	qp_attr->qkey 		= IOC_NUMBER(be64_to_cpu(viport_config->ioc_guid));
+	qp_attr->pkey_index	= 0;
+	/* cannot set access flags for UD qp
+	qp_attr->qp_access_flags	= IB_ACCESS_REMOTE_WRITE; */
+
+	IB_INFO("port_num:%d qkey:%d pkey:%d\n", qp_attr->port_num,
+			qp_attr->qkey, qp_attr->pkey_index);
+	ret = ib_modify_qp(mc_data->ib_conn.qp, qp_attr,
+			   IB_QP_STATE |
+			   IB_QP_PKEY_INDEX |
+			   IB_QP_QKEY |
+
+			/* cannot set this for UD
+			   IB_QP_ACCESS_FLAGS | */
+
+			   IB_QP_PORT);
+	if (ret) {
+		IB_ERROR("ib_modify_qp to INIT failed %d \n", ret);
+		goto free_qp_attr;
+	}
+
+	kfree(qp_attr);
+	kfree(init_attr);
+	return ret;
+
+free_qp_attr:
+	kfree(qp_attr);
+destroy_qp:
+	ib_destroy_qp(mc_data->ib_conn.qp);
+	mc_data->ib_conn.qp = ERR_PTR(-EINVAL);
+free_init_attr:
+	kfree(init_attr);
+	return ret;
+}
+
+int vnic_ib_mc_mod_qp_to_rts(struct ib_qp *qp)
+{
+	int ret;
+	struct ib_qp_attr *qp_attr = NULL;
+
+	IB_FUNCTION("vnic_ib_mc_mod_qp_to_rts\n");
+	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
+	if (!qp_attr)
+		return -ENOMEM;
+
+	memset(qp_attr, 0, sizeof *qp_attr);
+	qp_attr->qp_state = IB_QPS_RTR;
+
+	ret = ib_modify_qp(qp, qp_attr, IB_QP_STATE);
+	if (ret) {
+		IB_ERROR("ib_modify_qp to RTR failed %d\n", ret);
+		goto out;
+	}
+	IB_INFO("MC QP RTR\n");
+
+	memset(qp_attr, 0, sizeof *qp_attr);
+	qp_attr->qp_state = IB_QPS_RTS;
+	qp_attr->sq_psn = 0;
+
+	ret = ib_modify_qp(qp, qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
+	if (ret) {
+		IB_ERROR("ib_modify_qp to RTS failed %d\n", ret);
+		goto out;
+	}
+	IB_INFO("MC QP RTS\n");
+
+	return 0;
+
+out:
+	kfree(qp_attr);
+	return -1;
+}
+
+int vnic_ib_mc_post_recv(struct mc_data *mc_data, struct io *io)
+{
+	cycles_t		post_time;
+	struct ib_recv_wr	*bad_wr;
+	int			ret = -1;
+
+	IB_FUNCTION("vnic_ib_mc_post_recv()\n");
+
+	vnic_ib_pre_rcvpost_stats(&mc_data->ib_conn, io, &post_time);
+	io->type = RECV_UD;
+	ret = ib_post_recv(mc_data->ib_conn.qp, &io->rwr, &bad_wr);
+	if (ret) {
+		IB_ERROR("error in posting rcv wr; error %d\n", ret);
+		goto out;
+	}
+	vnic_ib_post_rcvpost_stats(&mc_data->ib_conn, post_time);
+
+out:
+	return ret;
+}
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.h b/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.h
new file mode 100644
index 0000000..6303ae6
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_ib.h
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc.  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.
+ */
+
+#ifndef VNIC_IB_H_INCLUDED
+#define VNIC_IB_H_INCLUDED
+
+#include <linux/timex.h>
+#include <linux/completion.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_pack.h>
+#include <rdma/ib_sa.h>
+#include <rdma/ib_cm.h>
+
+#include "vnic_sys.h"
+#include "vnic_netpath.h"
+#define PFX	"qlgc_vnic: "
+
+struct io;
+typedef void (comp_routine_t) (struct io *io);
+
+enum vnic_ib_conn_state {
+	IB_CONN_UNINITTED	= 0,
+	IB_CONN_INITTED		= 1,
+	IB_CONN_CONNECTING	= 2,
+	IB_CONN_CONNECTED	= 3,
+	IB_CONN_DISCONNECTED	= 4,
+	IB_CONN_ERRORED		= 5
+};
+
+struct vnic_ib_conn {
+	struct viport		*viport;
+	struct vnic_ib_config	*ib_config;
+	spinlock_t		conn_lock;
+	enum vnic_ib_conn_state	state;
+	struct ib_qp		*qp;
+	struct ib_cq		*cq;
+	struct ib_cm_id		*cm_id;
+	int 			callback_thread_end;
+	struct task_struct	*callback_thread;
+	wait_queue_head_t	callback_wait_queue;
+	u32 			in_thread;
+	u32 			compl_received;
+	struct completion 	callback_thread_exit;
+	spinlock_t		compl_received_lock;
+#ifdef CONFIG_INFINIBAND_QLGC_VNIC_STATS
+	struct {
+		cycles_t	connection_time;
+		cycles_t	rdma_post_time;
+		u32		rdma_post_ios;
+		cycles_t	rdma_comp_time;
+		u32		rdma_comp_ios;
+		cycles_t	send_post_time;
+		u32		send_post_ios;
+		cycles_t	send_comp_time;
+		u32		send_comp_ios;
+		cycles_t	recv_post_time;
+		u32		recv_post_ios;
+		cycles_t	recv_comp_time;
+		u32		recv_comp_ios;
+		u32		num_ios;
+		u32		num_callbacks;
+		u32		max_ios;
+	} statistics;
+#endif	/* CONFIG_INFINIBAND_QLGC_VNIC_STATS */
+};
+
+struct vnic_ib_path_info {
+	struct ib_sa_path_rec	path;
+	struct ib_sa_query	*path_query;
+	int			path_query_id;
+	int			status;
+	struct			completion done;
+};
+
+struct vnic_ib_device {
+	struct ib_device	*dev;
+	struct list_head	port_list;
+};
+
+struct vnic_ib_port {
+	struct vnic_ib_device	*dev;
+	u8			port_num;
+	struct dev_info		pdev_info;
+	struct list_head	list;
+};
+
+struct io {
+	struct list_head	list_ptrs;
+	struct viport		*viport;
+	comp_routine_t		*routine;
+	struct ib_recv_wr	rwr;
+	struct ib_send_wr	swr;
+#ifdef CONFIG_INFINIBAND_QLGC_VNIC_STATS
+	cycles_t		time;
+#endif	/* CONFIG_INFINIBAND_QLGC_VNIC_STATS */
+	enum {RECV, RDMA, SEND, RECV_UD}	type;
+};
+
+struct rdma_io {
+	struct io		io;
+	struct ib_sge		list[2];
+	u16			index;
+	u16			len;
+	u8			*data;
+	dma_addr_t		data_dma;
+	struct sk_buff		*skb;
+	dma_addr_t		skb_data_dma;
+	struct viport_trailer 	*trailer;
+	dma_addr_t 		trailer_dma;
+};
+
+struct send_io {
+	struct io	io;
+	struct ib_sge	list;
+	u8		*virtual_addr;
+};
+
+struct recv_io {
+	struct io	io;
+	struct ib_sge	list;
+	u8		*virtual_addr;
+};
+
+struct ud_recv_io {
+	struct io	io;
+	u16 	len;
+	dma_addr_t		skb_data_dma;
+	struct ib_sge	list[2]; /* one for grh and other for rest of pkt. */
+	struct sk_buff 	*skb;
+};
+
+int	vnic_ib_init(void);
+void	vnic_ib_cleanup(void);
+void vnic_completion_cleanup(struct vnic_ib_conn *ib_conn);
+
+struct vnic;
+int vnic_ib_get_path(struct netpath *netpath, struct vnic *vnic);
+int vnic_ib_conn_init(struct vnic_ib_conn *ib_conn, struct viport *viport,
+		      struct ib_pd *pd, struct vnic_ib_config *config);
+
+int vnic_ib_post_recv(struct vnic_ib_conn *ib_conn, struct io *io);
+int vnic_ib_post_send(struct vnic_ib_conn *ib_conn, struct io *io);
+int vnic_ib_cm_connect(struct vnic_ib_conn *ib_conn);
+int vnic_ib_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event);
+
+#define	vnic_ib_conn_uninitted(ib_conn)			\
+	((ib_conn)->state == IB_CONN_UNINITTED)
+#define	vnic_ib_conn_initted(ib_conn)			\
+	((ib_conn)->state == IB_CONN_INITTED)
+#define	vnic_ib_conn_connecting(ib_conn)		\
+	((ib_conn)->state == IB_CONN_CONNECTING)
+#define	vnic_ib_conn_connected(ib_conn)			\
+	((ib_conn)->state == IB_CONN_CONNECTED)
+#define	vnic_ib_conn_disconnected(ib_conn)		\
+	((ib_conn)->state == IB_CONN_DISCONNECTED)
+
+#define MCAST_GROUP_INVALID 0x00 /* viport failed to join or left mc group */
+#define MCAST_GROUP_JOINING 0x01 /* wait for completion */
+#define MCAST_GROUP_JOINED  0x02 /* join process completed successfully */
+
+/* vnic_sa_client is used to register with sa once. It is needed to join and
+ * leave multicast groups.
+ */
+extern struct ib_sa_client vnic_sa_client;
+
+/* The following functions are using initialize and handle multicast
+ * components.
+ */
+struct mc_data; /* forward declaration */
+/* Initialize all necessary mc components */
+int vnic_ib_mc_init(struct mc_data *mc_data, struct viport *viport,
+			struct ib_pd *pd, struct vnic_ib_config *config);
+/* Put multicast qp in RTS */
+int vnic_ib_mc_mod_qp_to_rts(struct ib_qp *qp);
+/* Post multicast receive buffers */
+int vnic_ib_mc_post_recv(struct mc_data *mc_data, struct io *io);
+
+#endif	/* VNIC_IB_H_INCLUDED */