[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / ulp / ipoib / ipoib_verbs.c

/*
 * 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_sendq_size,
			.max_recv_wr  = ipoib_recvq_size,
			.max_send_sge = 1,
			.max_recv_sge = 1
		},
		.sq_sig_type = IB_SIGNAL_ALL_WR,
		.qp_type     = IB_QPT_UD
	};

	int ret, size;

	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->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_pd;
	}

	size = ipoib_sendq_size + ipoib_recvq_size + 1;
	ret = ipoib_cm_dev_init(dev);
	if (!ret)
		size += ipoib_recvq_size;

	priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
	if (IS_ERR(priv->cq)) {
		printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
		goto out_free_mr;
	}

	if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
		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_cq;
	}

	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_cq:
	ib_destroy_cq(priv->cq);

out_free_mr:
	ib_dereg_mr(priv->mr);

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

	ipoib_cm_dev_cleanup(dev);

	if (ib_dereg_mr(priv->mr))
		ipoib_warn(priv, "ib_dereg_mr 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_ERR    ||
	     record->event == IB_EVENT_PKEY_CHANGE ||
	     record->event == IB_EVENT_PORT_ACTIVE ||
	     record->event == IB_EVENT_LID_CHANGE  ||
	     record->event == IB_EVENT_SM_CHANGE   ||
	     record->event == IB_EVENT_CLIENT_REREGISTER) &&
	    record->element.port_num == priv->port) {
		ipoib_dbg(priv, "Port state change event\n");
		queue_work(ipoib_workqueue, &priv->flush_task);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
2a1d9b7f	3	* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
1da177e4 LT	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*
	33	* $Id: ipoib_verbs.c 1349 2004-12-16 21:09:43Z roland $
	34	*/
	35
a4d61e84	36	#include <rdma/ib_cache.h>
1da177e4 LT	37
	38	#include "ipoib.h"
	39
	40	int ipoib_mcast_attach(struct net_device dev, u16 mlid, union ib_gid mgid)
	41	{
	42	struct ipoib_dev_priv *priv = netdev_priv(dev);
	43	struct ib_qp_attr *qp_attr;
1da177e4 LT	44	int ret;
	45	u16 pkey_index;
	46
	47	ret = -ENOMEM;
	48	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
	49	if (!qp_attr)
	50	goto out;
	51
	52	if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
	53	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	54	ret = -ENXIO;
	55	goto out;
	56	}
	57	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	58
	59	/* set correct QKey for QP */
	60	qp_attr->qkey = priv->qkey;
3bc12e75	61	ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
1da177e4 LT	62	if (ret) {
	63	ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
	64	goto out;
	65	}
	66
	67	/* attach QP to multicast group */
95ed644f	68	mutex_lock(&priv->mcast_mutex);
1da177e4	69	ret = ib_attach_mcast(priv->qp, mgid, mlid);
95ed644f	70	mutex_unlock(&priv->mcast_mutex);
1da177e4 LT	71	if (ret)
	72	ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
	73
	74	out:
	75	kfree(qp_attr);
	76	return ret;
	77	}
	78
	79	int ipoib_mcast_detach(struct net_device dev, u16 mlid, union ib_gid mgid)
	80	{
	81	struct ipoib_dev_priv *priv = netdev_priv(dev);
	82	int ret;
	83
95ed644f	84	mutex_lock(&priv->mcast_mutex);
1da177e4	85	ret = ib_detach_mcast(priv->qp, mgid, mlid);
95ed644f	86	mutex_unlock(&priv->mcast_mutex);
1da177e4 LT	87	if (ret)
	88	ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
	89
	90	return ret;
	91	}
	92
5b6810e0	93	int ipoib_init_qp(struct net_device *dev)
1da177e4 LT	94	{
	95	struct ipoib_dev_priv *priv = netdev_priv(dev);
	96	int ret;
	97	u16 pkey_index;
	98	struct ib_qp_attr qp_attr;
	99	int attr_mask;
	100
	101	/*
	102	* Search through the port P_Key table for the requested pkey value.
	103	* The port has to be assigned to the respective IB partition in
	104	* advance.
	105	*/
	106	ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index);
	107	if (ret) {
	108	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	109	return ret;
	110	}
	111	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	112
	113	qp_attr.qp_state = IB_QPS_INIT;
	114	qp_attr.qkey = 0;
	115	qp_attr.port_num = priv->port;
	116	qp_attr.pkey_index = pkey_index;
	117	attr_mask =
	118	IB_QP_QKEY \|
	119	IB_QP_PORT \|
	120	IB_QP_PKEY_INDEX \|
	121	IB_QP_STATE;
	122	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	123	if (ret) {
	124	ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
	125	goto out_fail;
	126	}
	127
	128	qp_attr.qp_state = IB_QPS_RTR;
	129	/* Can't set this in a INIT->RTR transition */
	130	attr_mask &= ~IB_QP_PORT;
	131	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	132	if (ret) {
	133	ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
	134	goto out_fail;
	135	}
	136
	137	qp_attr.qp_state = IB_QPS_RTS;
	138	qp_attr.sq_psn = 0;
	139	attr_mask \|= IB_QP_SQ_PSN;
	140	attr_mask &= ~IB_QP_PKEY_INDEX;
	141	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	142	if (ret) {
	143	ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
	144	goto out_fail;
	145	}
	146
	147	return 0;
	148
	149	out_fail:
5b6810e0 RD	150	qp_attr.qp_state = IB_QPS_RESET;
	151	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
	152	ipoib_warn(priv, "Failed to modify QP to RESET state\n");
1da177e4	153
5b6810e0	154	return ret;
1da177e4 LT	155	}
	156
	157	int ipoib_transport_dev_init(struct net_device dev, struct ib_device ca)
	158	{
	159	struct ipoib_dev_priv *priv = netdev_priv(dev);
	160	struct ib_qp_init_attr init_attr = {
	161	.cap = {
0f485251 SM	162	.max_send_wr = ipoib_sendq_size,
0f485251 SM	163	.max_recv_wr = ipoib_recvq_size,
1da177e4 LT	164	.max_send_sge = 1,
	165	.max_recv_sge = 1
	166	},
	167	.sq_sig_type = IB_SIGNAL_ALL_WR,
	168	.qp_type = IB_QPT_UD
	169	};
	170
839fcaba MT	171	int ret, size;
839fcaba MT	172
1da177e4 LT	173	priv->pd = ib_alloc_pd(priv->ca);
	174	if (IS_ERR(priv->pd)) {
	175	printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
	176	return -ENODEV;
	177	}
	178
839fcaba MT	179	priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
	180	if (IS_ERR(priv->mr)) {
	181	printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
	182	goto out_free_pd;
	183	}
	184
	185	size = ipoib_sendq_size + ipoib_recvq_size + 1;
	186	ret = ipoib_cm_dev_init(dev);
	187	if (!ret)
	188	size += ipoib_recvq_size;
	189
f4fd0b22	190	priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
1da177e4 LT	191	if (IS_ERR(priv->cq)) {
1da177e4 LT	192	printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
839fcaba	193	goto out_free_mr;
1da177e4 LT	194	}
	195
	196	if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
	197	goto out_free_cq;
	198
1da177e4 LT	199	init_attr.send_cq = priv->cq;
	200	init_attr.recv_cq = priv->cq,
	201
	202	priv->qp = ib_create_qp(priv->pd, &init_attr);
	203	if (IS_ERR(priv->qp)) {
	204	printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
839fcaba	205	goto out_free_cq;
1da177e4 LT	206	}
	207
	208	priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
	209	priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
	210	priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
	211
	212	priv->tx_sge.lkey = priv->mr->lkey;
	213
	214	priv->tx_wr.opcode = IB_WR_SEND;
	215	priv->tx_wr.sg_list = &priv->tx_sge;
	216	priv->tx_wr.num_sge = 1;
	217	priv->tx_wr.send_flags = IB_SEND_SIGNALED;
	218
	219	return 0;
	220
1da177e4 LT	221	out_free_cq:
	222	ib_destroy_cq(priv->cq);
	223
839fcaba MT	224	out_free_mr:
	225	ib_dereg_mr(priv->mr);
	226
1da177e4 LT	227	out_free_pd:
	228	ib_dealloc_pd(priv->pd);
	229	return -ENODEV;
	230	}
	231
	232	void ipoib_transport_dev_cleanup(struct net_device *dev)
	233	{
	234	struct ipoib_dev_priv *priv = netdev_priv(dev);
	235
	236	if (priv->qp) {
	237	if (ib_destroy_qp(priv->qp))
	238	ipoib_warn(priv, "ib_qp_destroy failed\n");
	239
	240	priv->qp = NULL;
	241	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	242	}
	243
1da177e4 LT	244	if (ib_destroy_cq(priv->cq))
	245	ipoib_warn(priv, "ib_cq_destroy failed\n");
	246
839fcaba MT	247	ipoib_cm_dev_cleanup(dev);
	248
	249	if (ib_dereg_mr(priv->mr))
	250	ipoib_warn(priv, "ib_dereg_mr failed\n");
	251
1da177e4 LT	252	if (ib_dealloc_pd(priv->pd))
	253	ipoib_warn(priv, "ib_dealloc_pd failed\n");
	254	}
	255
	256	void ipoib_event(struct ib_event_handler *handler,
	257	struct ib_event *record)
	258	{
	259	struct ipoib_dev_priv *priv =
	260	container_of(handler, struct ipoib_dev_priv, event_handler);
	261
a27cbe87 RD	262	if ((record->event == IB_EVENT_PORT_ERR \|\|
	263	record->event == IB_EVENT_PKEY_CHANGE \|\|
	264	record->event == IB_EVENT_PORT_ACTIVE \|\|
	265	record->event == IB_EVENT_LID_CHANGE \|\|
	266	record->event == IB_EVENT_SM_CHANGE \|\|
	267	record->event == IB_EVENT_CLIENT_REREGISTER) &&
	268	record->element.port_num == priv->port) {
4e37b956	269	ipoib_dbg(priv, "Port state change event\n");
0b3ea082	270	queue_work(ipoib_workqueue, &priv->flush_task);
1da177e4 LT	271	}
1da177e4 LT	272	}