[GitHub/mt8127/android_kernel_alcatel_ttab.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 "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_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;
	struct ib_qp_attr qp_attr;
	int attr_mask;

	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
		return -1;

	qp_attr.qp_state = IB_QPS_INIT;
	qp_attr.qkey = 0;
	qp_attr.port_num = priv->port;
	qp_attr.pkey_index = priv->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;
	int i;

	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) {
		if (ipoib_cm_has_srq(dev))
			size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
		else
			size += ipoib_recvq_size * ipoib_max_conn_qp;
	}

	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;

	if (priv->hca_caps & IB_DEVICE_UD_TSO)
		init_attr.create_flags = IB_QP_CREATE_IPOIB_UD_LSO;

	if (dev->features & NETIF_F_SG)
		init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;

	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;

	for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
		priv->tx_sge[i].lkey = priv->mr->lkey;

	priv->tx_wr.opcode	= IB_WR_SEND;
	priv->tx_wr.sg_list	= priv->tx_sge;
	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);
	ipoib_cm_dev_cleanup(dev);

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->element.port_num != priv->port)
		return;

	if (record->event == IB_EVENT_PORT_ERR    ||
	    record->event == IB_EVENT_PORT_ACTIVE ||
	    record->event == IB_EVENT_LID_CHANGE  ||
	    record->event == IB_EVENT_SM_CHANGE   ||
	    record->event == IB_EVENT_CLIENT_REREGISTER) {
		ipoib_dbg(priv, "Port state change event\n");
		queue_work(ipoib_workqueue, &priv->flush_task);
	} else if (record->event == IB_EVENT_PKEY_CHANGE) {
		ipoib_dbg(priv, "P_Key change event on port:%d\n", priv->port);
		queue_work(ipoib_workqueue, &priv->pkey_event_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
1da177e4 LT	36	#include "ipoib.h"
	37
	38	int ipoib_mcast_attach(struct net_device dev, u16 mlid, union ib_gid mgid)
	39	{
	40	struct ipoib_dev_priv *priv = netdev_priv(dev);
	41	struct ib_qp_attr *qp_attr;
1da177e4 LT	42	int ret;
	43	u16 pkey_index;
	44
	45	ret = -ENOMEM;
	46	qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
	47	if (!qp_attr)
	48	goto out;
	49
26bbf13c	50	if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
1da177e4 LT	51	clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	52	ret = -ENXIO;
	53	goto out;
	54	}
	55	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	56
	57	/* set correct QKey for QP */
	58	qp_attr->qkey = priv->qkey;
3bc12e75	59	ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
1da177e4 LT	60	if (ret) {
	61	ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
	62	goto out;
	63	}
	64
	65	/* attach QP to multicast group */
95ed644f	66	mutex_lock(&priv->mcast_mutex);
1da177e4	67	ret = ib_attach_mcast(priv->qp, mgid, mlid);
95ed644f	68	mutex_unlock(&priv->mcast_mutex);
1da177e4 LT	69	if (ret)
	70	ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
	71
	72	out:
	73	kfree(qp_attr);
	74	return ret;
	75	}
	76
	77	int ipoib_mcast_detach(struct net_device dev, u16 mlid, union ib_gid mgid)
	78	{
	79	struct ipoib_dev_priv *priv = netdev_priv(dev);
	80	int ret;
	81
95ed644f	82	mutex_lock(&priv->mcast_mutex);
1da177e4	83	ret = ib_detach_mcast(priv->qp, mgid, mlid);
95ed644f	84	mutex_unlock(&priv->mcast_mutex);
1da177e4 LT	85	if (ret)
	86	ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
	87
	88	return ret;
	89	}
	90
5b6810e0	91	int ipoib_init_qp(struct net_device *dev)
1da177e4 LT	92	{
	93	struct ipoib_dev_priv *priv = netdev_priv(dev);
	94	int ret;
1da177e4 LT	95	struct ib_qp_attr qp_attr;
	96	int attr_mask;
	97
26bbf13c YE	98	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
26bbf13c YE	99	return -1;
1da177e4 LT	100
	101	qp_attr.qp_state = IB_QPS_INIT;
	102	qp_attr.qkey = 0;
	103	qp_attr.port_num = priv->port;
26bbf13c	104	qp_attr.pkey_index = priv->pkey_index;
1da177e4 LT	105	attr_mask =
	106	IB_QP_QKEY \|
	107	IB_QP_PORT \|
	108	IB_QP_PKEY_INDEX \|
	109	IB_QP_STATE;
	110	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	111	if (ret) {
	112	ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
	113	goto out_fail;
	114	}
	115
	116	qp_attr.qp_state = IB_QPS_RTR;
	117	/* Can't set this in a INIT->RTR transition */
	118	attr_mask &= ~IB_QP_PORT;
	119	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	120	if (ret) {
	121	ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
	122	goto out_fail;
	123	}
	124
	125	qp_attr.qp_state = IB_QPS_RTS;
	126	qp_attr.sq_psn = 0;
	127	attr_mask \|= IB_QP_SQ_PSN;
	128	attr_mask &= ~IB_QP_PKEY_INDEX;
	129	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	130	if (ret) {
	131	ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
	132	goto out_fail;
	133	}
	134
	135	return 0;
	136
	137	out_fail:
5b6810e0 RD	138	qp_attr.qp_state = IB_QPS_RESET;
	139	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
	140	ipoib_warn(priv, "Failed to modify QP to RESET state\n");
1da177e4	141
5b6810e0	142	return ret;
1da177e4 LT	143	}
	144
	145	int ipoib_transport_dev_init(struct net_device dev, struct ib_device ca)
	146	{
	147	struct ipoib_dev_priv *priv = netdev_priv(dev);
	148	struct ib_qp_init_attr init_attr = {
	149	.cap = {
0f485251 SM	150	.max_send_wr = ipoib_sendq_size,
0f485251 SM	151	.max_recv_wr = ipoib_recvq_size,
1da177e4 LT	152	.max_send_sge = 1,
	153	.max_recv_sge = 1
	154	},
	155	.sq_sig_type = IB_SIGNAL_ALL_WR,
	156	.qp_type = IB_QPT_UD
	157	};
	158
839fcaba	159	int ret, size;
7143740d	160	int i;
839fcaba	161
1da177e4 LT	162	priv->pd = ib_alloc_pd(priv->ca);
	163	if (IS_ERR(priv->pd)) {
	164	printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
	165	return -ENODEV;
	166	}
	167
839fcaba MT	168	priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
	169	if (IS_ERR(priv->mr)) {
	170	printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
	171	goto out_free_pd;
	172	}
	173
	174	size = ipoib_sendq_size + ipoib_recvq_size + 1;
	175	ret = ipoib_cm_dev_init(dev);
68e995a2 PS	176	if (!ret) {
	177	if (ipoib_cm_has_srq(dev))
	178	size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
	179	else
	180	size += ipoib_recvq_size * ipoib_max_conn_qp;
	181	}
839fcaba	182
f4fd0b22	183	priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
1da177e4 LT	184	if (IS_ERR(priv->cq)) {
1da177e4 LT	185	printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
839fcaba	186	goto out_free_mr;
1da177e4 LT	187	}
	188
	189	if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
	190	goto out_free_cq;
	191
1da177e4	192	init_attr.send_cq = priv->cq;
b3ac60fc	193	init_attr.recv_cq = priv->cq;
1da177e4	194
40ca1988 EC	195	if (priv->hca_caps & IB_DEVICE_UD_TSO)
	196	init_attr.create_flags = IB_QP_CREATE_IPOIB_UD_LSO;
	197
7143740d EC	198	if (dev->features & NETIF_F_SG)
	199	init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
	200
1da177e4 LT	201	priv->qp = ib_create_qp(priv->pd, &init_attr);
	202	if (IS_ERR(priv->qp)) {
	203	printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
839fcaba	204	goto out_free_cq;
1da177e4 LT	205	}
	206
	207	priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
	208	priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
	209	priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
	210
7143740d EC	211	for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
7143740d EC	212	priv->tx_sge[i].lkey = priv->mr->lkey;
1da177e4	213
2337f809	214	priv->tx_wr.opcode = IB_WR_SEND;
7143740d	215	priv->tx_wr.sg_list = priv->tx_sge;
2337f809	216	priv->tx_wr.send_flags = IB_SEND_SIGNALED;
1da177e4 LT	217
	218	return 0;
	219
1da177e4 LT	220	out_free_cq:
	221	ib_destroy_cq(priv->cq);
	222
839fcaba MT	223	out_free_mr:
839fcaba MT	224	ib_dereg_mr(priv->mr);
6958e827	225	ipoib_cm_dev_cleanup(dev);
839fcaba	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
26bbf13c YE	262	if (record->element.port_num != priv->port)
	263	return;
	264
	265	if (record->event == IB_EVENT_PORT_ERR \|\|
	266	record->event == IB_EVENT_PORT_ACTIVE \|\|
	267	record->event == IB_EVENT_LID_CHANGE \|\|
	268	record->event == IB_EVENT_SM_CHANGE \|\|
	269	record->event == IB_EVENT_CLIENT_REREGISTER) {
4e37b956	270	ipoib_dbg(priv, "Port state change event\n");
0b3ea082	271	queue_work(ipoib_workqueue, &priv->flush_task);
26bbf13c YE	272	} else if (record->event == IB_EVENT_PKEY_CHANGE) {
	273	ipoib_dbg(priv, "P_Key change event on port:%d\n", priv->port);
	274	queue_work(ipoib_workqueue, &priv->pkey_event_task);
1da177e4 LT	275	}
1da177e4 LT	276	}