drivers/infiniband/ulp/ipoib/ipoib_verbs.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
  * Copyright (c) 2005 Mellanox Technologies. 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.
  *
  * $Id: ipoib_verbs.c 1349 2004-12-16 21:09:43Z roland $
  */

 #include <rdma/ib_cache.h>

 #include "ipoib.h"

 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct ib_qp_attr *qp_attr;
 	int ret;
 	u16 pkey_index;

 	ret = -ENOMEM;
 	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
 	if (!qp_attr)
 		goto out;

 	if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
 		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 		ret = -ENXIO;
 		goto out;
 	}
 	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

 	/* set correct QKey for QP */
 	qp_attr->qkey = priv->qkey;
 	ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
 	if (ret) {
 		ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
 		goto out;
 	}

 	/* attach QP to multicast group */
 	mutex_lock(&priv->mcast_mutex);
 	ret = ib_attach_mcast(priv->qp, mgid, mlid);
 	mutex_unlock(&priv->mcast_mutex);
 	if (ret)
 		ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);

 out:
 	kfree(qp_attr);
 	return ret;
 }

 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	int ret;

 	mutex_lock(&priv->mcast_mutex);
 	ret = ib_detach_mcast(priv->qp, mgid, mlid);
 	mutex_unlock(&priv->mcast_mutex);
 	if (ret)
 		ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);

 	return ret;
 }

 int ipoib_init_qp(struct net_device *dev)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	int ret;
 	u16 pkey_index;
 	struct ib_qp_attr qp_attr;
 	int attr_mask;

 	/*
 	 * Search through the port P_Key table for the requested pkey value.
 	 * The port has to be assigned to the respective IB partition in
 	 * advance.
 	 */
 	ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index);
 	if (ret) {
 		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 		return ret;
 	}
 	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

 	qp_attr.qp_state = IB_QPS_INIT;
 	qp_attr.qkey = 0;
 	qp_attr.port_num = priv->port;
 	qp_attr.pkey_index = pkey_index;
 	attr_mask =
 	    IB_QP_QKEY |
 	    IB_QP_PORT |
 	    IB_QP_PKEY_INDEX |
 	    IB_QP_STATE;
 	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 	if (ret) {
 		ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
 		goto out_fail;
 	}

 	qp_attr.qp_state = IB_QPS_RTR;
 	/* Can't set this in a INIT->RTR transition */
 	attr_mask &= ~IB_QP_PORT;
 	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 	if (ret) {
 		ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 		goto out_fail;
 	}

 	qp_attr.qp_state = IB_QPS_RTS;
 	qp_attr.sq_psn = 0;
 	attr_mask |= IB_QP_SQ_PSN;
 	attr_mask &= ~IB_QP_PKEY_INDEX;
 	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 	if (ret) {
 		ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 		goto out_fail;
 	}

 	return 0;

 out_fail:
 	qp_attr.qp_state = IB_QPS_RESET;
 	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 		ipoib_warn(priv, "Failed to modify QP to RESET state\n");

 	return ret;
 }

 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct ib_qp_init_attr init_attr = {
 		.cap = {
 			.max_send_wr  = IPOIB_TX_RING_SIZE,
 			.max_recv_wr  = IPOIB_RX_RING_SIZE,
 			.max_send_sge = 1,
 			.max_recv_sge = 1
 		},
 		.sq_sig_type = IB_SIGNAL_ALL_WR,
 		.qp_type     = IB_QPT_UD
 	};

 	priv->pd = ib_alloc_pd(priv->ca);
 	if (IS_ERR(priv->pd)) {
 		printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
 		return -ENODEV;
 	}

 	priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev,
 				IPOIB_TX_RING_SIZE + IPOIB_RX_RING_SIZE + 1);
 	if (IS_ERR(priv->cq)) {
 		printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
 		goto out_free_pd;
 	}

 	if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
 		goto out_free_cq;

 	priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
 	if (IS_ERR(priv->mr)) {
 		printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
 		goto out_free_cq;
 	}

 	init_attr.send_cq = priv->cq;
 	init_attr.recv_cq = priv->cq,

 	priv->qp = ib_create_qp(priv->pd, &init_attr);
 	if (IS_ERR(priv->qp)) {
 		printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
 		goto out_free_mr;
 	}

 	priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
 	priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
 	priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;

 	priv->tx_sge.lkey 	= priv->mr->lkey;

 	priv->tx_wr.opcode 	= IB_WR_SEND;
 	priv->tx_wr.sg_list 	= &priv->tx_sge;
 	priv->tx_wr.num_sge 	= 1;
 	priv->tx_wr.send_flags 	= IB_SEND_SIGNALED;

 	return 0;

 out_free_mr:
 	ib_dereg_mr(priv->mr);

 out_free_cq:
 	ib_destroy_cq(priv->cq);

 out_free_pd:
 	ib_dealloc_pd(priv->pd);
 	return -ENODEV;
 }

 void ipoib_transport_dev_cleanup(struct net_device *dev)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);

 	if (priv->qp) {
 		if (ib_destroy_qp(priv->qp))
 			ipoib_warn(priv, "ib_qp_destroy failed\n");

 		priv->qp = NULL;
 		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 	}

 	if (ib_dereg_mr(priv->mr))
 		ipoib_warn(priv, "ib_dereg_mr failed\n");

 	if (ib_destroy_cq(priv->cq))
 		ipoib_warn(priv, "ib_cq_destroy failed\n");

 	if (ib_dealloc_pd(priv->pd))
 		ipoib_warn(priv, "ib_dealloc_pd failed\n");
 }

 void ipoib_event(struct ib_event_handler *handler,
 		 struct ib_event *record)
 {
 	struct ipoib_dev_priv *priv =
 		container_of(handler, struct ipoib_dev_priv, event_handler);

 	if (record->event == IB_EVENT_PORT_ACTIVE ||
 	    record->event == IB_EVENT_LID_CHANGE  ||
 	    record->event == IB_EVENT_SM_CHANGE) {
 		ipoib_dbg(priv, "Port active event\n");
 		schedule_work(&priv->flush_task);
 	}
 }
	/*
	* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
	* Copyright (c) 2005 Mellanox Technologies. 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.
	*
	* $Id: ipoib_verbs.c 1349 2004-12-16 21:09:43Z roland $
	*/

	#include <rdma/ib_cache.h>

	#include "ipoib.h"

	int ipoib_mcast_attach(struct net_device dev, u16 mlid, union ib_gid mgid)
	{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	struct ib_qp_attr *qp_attr;
	int ret;
	u16 pkey_index;

	ret = -ENOMEM;
	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
	if (!qp_attr)
	goto out;

	if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	ret = -ENXIO;
	goto out;
	}
	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

	/* set correct QKey for QP */
	qp_attr->qkey = priv->qkey;
	ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
	if (ret) {
	ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
	goto out;
	}

	/* attach QP to multicast group */
	mutex_lock(&priv->mcast_mutex);
	ret = ib_attach_mcast(priv->qp, mgid, mlid);
	mutex_unlock(&priv->mcast_mutex);
	if (ret)
	ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);

	out:
	kfree(qp_attr);
	return ret;
	}

	int ipoib_mcast_detach(struct net_device dev, u16 mlid, union ib_gid mgid)
	{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	int ret;

	mutex_lock(&priv->mcast_mutex);
	ret = ib_detach_mcast(priv->qp, mgid, mlid);
	mutex_unlock(&priv->mcast_mutex);
	if (ret)
	ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);

	return ret;
	}

	int ipoib_init_qp(struct net_device *dev)
	{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	int ret;
	u16 pkey_index;
	struct ib_qp_attr qp_attr;
	int attr_mask;

	/*
	* Search through the port P_Key table for the requested pkey value.
	* The port has to be assigned to the respective IB partition in
	* advance.
	*/
	ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index);
	if (ret) {
	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	return ret;
	}
	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

	qp_attr.qp_state = IB_QPS_INIT;
	qp_attr.qkey = 0;
	qp_attr.port_num = priv->port;
	qp_attr.pkey_index = pkey_index;
	attr_mask =
	IB_QP_QKEY \|
	IB_QP_PORT \|
	IB_QP_PKEY_INDEX \|
	IB_QP_STATE;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
	ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
	goto out_fail;
	}

	qp_attr.qp_state = IB_QPS_RTR;
	/* Can't set this in a INIT->RTR transition */
	attr_mask &= ~IB_QP_PORT;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
	ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
	goto out_fail;
	}

	qp_attr.qp_state = IB_QPS_RTS;
	qp_attr.sq_psn = 0;
	attr_mask \|= IB_QP_SQ_PSN;
	attr_mask &= ~IB_QP_PKEY_INDEX;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
	ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
	goto out_fail;
	}

	return 0;

	out_fail:
	qp_attr.qp_state = IB_QPS_RESET;
	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
	ipoib_warn(priv, "Failed to modify QP to RESET state\n");

	return ret;
	}

	int ipoib_transport_dev_init(struct net_device dev, struct ib_device ca)
	{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	struct ib_qp_init_attr init_attr = {
	.cap = {
	.max_send_wr = IPOIB_TX_RING_SIZE,
	.max_recv_wr = IPOIB_RX_RING_SIZE,
	.max_send_sge = 1,
	.max_recv_sge = 1
	},
	.sq_sig_type = IB_SIGNAL_ALL_WR,
	.qp_type = IB_QPT_UD
	};

	priv->pd = ib_alloc_pd(priv->ca);
	if (IS_ERR(priv->pd)) {
	printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
	return -ENODEV;
	}

	priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev,
	IPOIB_TX_RING_SIZE + IPOIB_RX_RING_SIZE + 1);
	if (IS_ERR(priv->cq)) {
	printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
	goto out_free_pd;
	}

	if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
	goto out_free_cq;

	priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
	if (IS_ERR(priv->mr)) {
	printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
	goto out_free_cq;
	}

	init_attr.send_cq = priv->cq;
	init_attr.recv_cq = priv->cq,

	priv->qp = ib_create_qp(priv->pd, &init_attr);
	if (IS_ERR(priv->qp)) {
	printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
	goto out_free_mr;
	}

	priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
	priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
	priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;

	priv->tx_sge.lkey = priv->mr->lkey;

	priv->tx_wr.opcode = IB_WR_SEND;
	priv->tx_wr.sg_list = &priv->tx_sge;
	priv->tx_wr.num_sge = 1;
	priv->tx_wr.send_flags = IB_SEND_SIGNALED;

	return 0;

	out_free_mr:
	ib_dereg_mr(priv->mr);

	out_free_cq:
	ib_destroy_cq(priv->cq);

	out_free_pd:
	ib_dealloc_pd(priv->pd);
	return -ENODEV;
	}

	void ipoib_transport_dev_cleanup(struct net_device *dev)
	{
	struct ipoib_dev_priv *priv = netdev_priv(dev);

	if (priv->qp) {
	if (ib_destroy_qp(priv->qp))
	ipoib_warn(priv, "ib_qp_destroy failed\n");

	priv->qp = NULL;
	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	}

	if (ib_dereg_mr(priv->mr))
	ipoib_warn(priv, "ib_dereg_mr failed\n");

	if (ib_destroy_cq(priv->cq))
	ipoib_warn(priv, "ib_cq_destroy failed\n");

	if (ib_dealloc_pd(priv->pd))
	ipoib_warn(priv, "ib_dealloc_pd failed\n");
	}

	void ipoib_event(struct ib_event_handler *handler,
	struct ib_event *record)
	{
	struct ipoib_dev_priv *priv =
	container_of(handler, struct ipoib_dev_priv, event_handler);

	if (record->event == IB_EVENT_PORT_ACTIVE \|\|
	record->event == IB_EVENT_LID_CHANGE \|\|
	record->event == IB_EVENT_SM_CHANGE) {
	ipoib_dbg(priv, "Port active event\n");
	schedule_work(&priv->flush_task);
	}
	}