[deliverable/linux.git] / drivers / infiniband / core / agent.c

/*
 * Copyright (c) 2004, 2005 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2004, 2005 Infinicon Corporation.  All rights reserved.
 * Copyright (c) 2004, 2005 Intel Corporation.  All rights reserved.
 * Copyright (c) 2004, 2005 Topspin Corporation.  All rights reserved.
 * Copyright (c) 2004, 2005 Voltaire Corporation.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, 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.
 *
 * $Id: agent.c 1389 2004-12-27 22:56:47Z roland $
 */

#include <linux/slab.h>
#include <linux/string.h>

#include "agent.h"
#include "smi.h"

#define SPFX "ib_agent: "

struct ib_agent_port_private {
	struct list_head port_list;
	struct ib_mad_agent *agent[2];
};

static DEFINE_SPINLOCK(ib_agent_port_list_lock);
static LIST_HEAD(ib_agent_port_list);

static struct ib_agent_port_private *
__ib_get_agent_port(struct ib_device *device, int port_num)
{
	struct ib_agent_port_private *entry;

	list_for_each_entry(entry, &ib_agent_port_list, port_list) {
		if (entry->agent[0]->device == device &&
		    entry->agent[0]->port_num == port_num)
			return entry;
	}
	return NULL;
}

static struct ib_agent_port_private *
ib_get_agent_port(struct ib_device *device, int port_num)
{
	struct ib_agent_port_private *entry;
	unsigned long flags;

	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
	entry = __ib_get_agent_port(device, port_num);
	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
	return entry;
}

int smi_check_local_dr_smp(struct ib_smp *smp,
			   struct ib_device *device,
			   int port_num)
{
	struct ib_agent_port_private *port_priv;

	if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
		return 1;

	port_priv = ib_get_agent_port(device, port_num);
	if (!port_priv) {
		printk(KERN_DEBUG SPFX "smi_check_local_dr_smp %s port %d "
		       "not open\n", device->name, port_num);
		return 1;
	}

	return smi_check_local_smp(port_priv->agent[0], smp);
}

int agent_send_response(struct ib_mad *mad, struct ib_grh *grh,
			struct ib_wc *wc, struct ib_device *device,
			int port_num, int qpn)
{
	struct ib_agent_port_private *port_priv;
	struct ib_mad_agent *agent;
	struct ib_mad_send_buf *send_buf;
	struct ib_ah *ah;
	int ret;

	port_priv = ib_get_agent_port(device, port_num);
	if (!port_priv) {
		printk(KERN_ERR SPFX "Unable to find port agent\n");
		return -ENODEV;
	}

	agent = port_priv->agent[qpn];
	ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
	if (IS_ERR(ah)) {
		ret = PTR_ERR(ah);
		printk(KERN_ERR SPFX "ib_create_ah_from_wc error:%d\n", ret);
		return ret;
	}

	send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
				      IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
				      GFP_KERNEL);
	if (IS_ERR(send_buf)) {
		ret = PTR_ERR(send_buf);
		printk(KERN_ERR SPFX "ib_create_send_mad error:%d\n", ret);
		goto err1;
	}

	memcpy(send_buf->mad, mad, sizeof *mad);
	send_buf->ah = ah;
	if ((ret = ib_post_send_mad(send_buf, NULL))) {
		printk(KERN_ERR SPFX "ib_post_send_mad error:%d\n", ret);
		goto err2;
	}
	return 0;
err2:
	ib_free_send_mad(send_buf);
err1:
	ib_destroy_ah(ah);
	return ret;
}

static void agent_send_handler(struct ib_mad_agent *mad_agent,
			       struct ib_mad_send_wc *mad_send_wc)
{
	ib_destroy_ah(mad_send_wc->send_buf->ah);
	ib_free_send_mad(mad_send_wc->send_buf);
}

int ib_agent_port_open(struct ib_device *device, int port_num)
{
	struct ib_agent_port_private *port_priv;
	unsigned long flags;
	int ret;

	/* Create new device info */
	port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
	if (!port_priv) {
		printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n");
		ret = -ENOMEM;
		goto error1;
	}

	/* Obtain send only MAD agent for SMI QP */
	port_priv->agent[0] = ib_register_mad_agent(device, port_num,
						    IB_QPT_SMI, NULL, 0,
						    &agent_send_handler,
						    NULL, NULL);
	if (IS_ERR(port_priv->agent[0])) {
		ret = PTR_ERR(port_priv->agent[0]);
		goto error2;
	}

	/* Obtain send only MAD agent for GSI QP */
	port_priv->agent[1] = ib_register_mad_agent(device, port_num,
						    IB_QPT_GSI, NULL, 0,
						    &agent_send_handler,
						    NULL, NULL);
	if (IS_ERR(port_priv->agent[1])) {
		ret = PTR_ERR(port_priv->agent[1]);
		goto error3;
	}

	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
	list_add_tail(&port_priv->port_list, &ib_agent_port_list);
	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);

	return 0;

error3:
	ib_unregister_mad_agent(port_priv->agent[0]);
error2:
	kfree(port_priv);
error1:
	return ret;
}

int ib_agent_port_close(struct ib_device *device, int port_num)
{
	struct ib_agent_port_private *port_priv;
	unsigned long flags;

	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
	port_priv = __ib_get_agent_port(device, port_num);
	if (port_priv == NULL) {
		spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
		printk(KERN_ERR SPFX "Port %d not found\n", port_num);
		return -ENODEV;
	}
	list_del(&port_priv->port_list);
	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);

	ib_unregister_mad_agent(port_priv->agent[1]);
	ib_unregister_mad_agent(port_priv->agent[0]);
	kfree(port_priv);
	return 0;
}
Commit	Line	Data
1da177e4	1	/*
2a1d9b7f RD	2	* Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
	3	* Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
	4	* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
	5	* Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
	6	* Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
	7	* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
1da177e4 LT	8	*
	9	* This software is available to you under a choice of one of two
	10	* licenses. You may choose to be licensed under the terms of the GNU
	11	* General Public License (GPL) Version 2, available from the file
	12	* COPYING in the main directory of this source tree, or the
	13	* OpenIB.org BSD license below:
	14	*
	15	* Redistribution and use in source and binary forms, with or
	16	* without modification, are permitted provided that the following
	17	* conditions are met:
	18	*
	19	* - Redistributions of source code must retain the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer.
	22	*
	23	* - Redistributions in binary form must reproduce the above
	24	* copyright notice, this list of conditions and the following
	25	* disclaimer in the documentation and/or other materials
	26	* provided with the distribution.
	27	*
	28	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	29	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	30	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	31	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	32	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	33	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	34	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	35	* SOFTWARE.
	36	*
	37	* $Id: agent.c 1389 2004-12-27 22:56:47Z roland $
	38	*/
	39
8c65b4a6 TS	40	#include <linux/slab.h>
	41	#include <linux/string.h>
	42
34816ad9 SH	43	#include "agent.h"
34816ad9 SH	44	#include "smi.h"
1da177e4	45
34816ad9	46	#define SPFX "ib_agent: "
1da177e4	47
34816ad9 SH	48	struct ib_agent_port_private {
	49	struct list_head port_list;
	50	struct ib_mad_agent *agent[2];
	51	};
1da177e4	52
34816ad9	53	static DEFINE_SPINLOCK(ib_agent_port_list_lock);
1da177e4 LT	54	static LIST_HEAD(ib_agent_port_list);
1da177e4 LT	55
34816ad9 SH	56	static struct ib_agent_port_private *
34816ad9 SH	57	__ib_get_agent_port(struct ib_device *device, int port_num)
1da177e4 LT	58	{
	59	struct ib_agent_port_private *entry;
	60
34816ad9 SH	61	list_for_each_entry(entry, &ib_agent_port_list, port_list) {
	62	if (entry->agent[0]->device == device &&
	63	entry->agent[0]->port_num == port_num)
	64	return entry;
1da177e4 LT	65	}
	66	return NULL;
	67	}
	68
34816ad9 SH	69	static struct ib_agent_port_private *
34816ad9 SH	70	ib_get_agent_port(struct ib_device *device, int port_num)
1da177e4 LT	71	{
	72	struct ib_agent_port_private *entry;
	73	unsigned long flags;
	74
	75	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
34816ad9	76	entry = __ib_get_agent_port(device, port_num);
1da177e4	77	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
1da177e4 LT	78	return entry;
	79	}
	80
	81	int smi_check_local_dr_smp(struct ib_smp *smp,
	82	struct ib_device *device,
	83	int port_num)
	84	{
	85	struct ib_agent_port_private *port_priv;
	86
	87	if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
	88	return 1;
34816ad9 SH	89
34816ad9 SH	90	port_priv = ib_get_agent_port(device, port_num);
1da177e4 LT	91	if (!port_priv) {
1da177e4 LT	92	printk(KERN_DEBUG SPFX "smi_check_local_dr_smp %s port %d "
34816ad9	93	"not open\n", device->name, port_num);
1da177e4 LT	94	return 1;
	95	}
	96
34816ad9	97	return smi_check_local_smp(port_priv->agent[0], smp);
1da177e4 LT	98	}
1da177e4 LT	99
34816ad9 SH	100	int agent_send_response(struct ib_mad mad, struct ib_grh grh,
	101	struct ib_wc wc, struct ib_device device,
	102	int port_num, int qpn)
1da177e4	103	{
34816ad9 SH	104	struct ib_agent_port_private *port_priv;
	105	struct ib_mad_agent *agent;
	106	struct ib_mad_send_buf *send_buf;
	107	struct ib_ah *ah;
	108	int ret;
1da177e4	109
34816ad9 SH	110	port_priv = ib_get_agent_port(device, port_num);
	111	if (!port_priv) {
	112	printk(KERN_ERR SPFX "Unable to find port agent\n");
	113	return -ENODEV;
1da177e4 LT	114	}
1da177e4 LT	115
34816ad9 SH	116	agent = port_priv->agent[qpn];
	117	ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
	118	if (IS_ERR(ah)) {
	119	ret = PTR_ERR(ah);
	120	printk(KERN_ERR SPFX "ib_create_ah_from_wc error:%d\n", ret);
	121	return ret;
1da177e4 LT	122	}
1da177e4 LT	123
34816ad9 SH	124	send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
	125	IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
	126	GFP_KERNEL);
	127	if (IS_ERR(send_buf)) {
	128	ret = PTR_ERR(send_buf);
	129	printk(KERN_ERR SPFX "ib_create_send_mad error:%d\n", ret);
	130	goto err1;
1da177e4	131	}
1da177e4	132
34816ad9 SH	133	memcpy(send_buf->mad, mad, sizeof *mad);
	134	send_buf->ah = ah;
	135	if ((ret = ib_post_send_mad(send_buf, NULL))) {
	136	printk(KERN_ERR SPFX "ib_post_send_mad error:%d\n", ret);
	137	goto err2;
1da177e4	138	}
34816ad9 SH	139	return 0;
	140	err2:
	141	ib_free_send_mad(send_buf);
	142	err1:
	143	ib_destroy_ah(ah);
1da177e4 LT	144	return ret;
	145	}
	146
1da177e4 LT	147	static void agent_send_handler(struct ib_mad_agent *mad_agent,
	148	struct ib_mad_send_wc *mad_send_wc)
	149	{
34816ad9 SH	150	ib_destroy_ah(mad_send_wc->send_buf->ah);
34816ad9 SH	151	ib_free_send_mad(mad_send_wc->send_buf);
1da177e4 LT	152	}
	153
	154	int ib_agent_port_open(struct ib_device *device, int port_num)
	155	{
1da177e4 LT	156	struct ib_agent_port_private *port_priv;
1da177e4 LT	157	unsigned long flags;
34816ad9	158	int ret;
1da177e4 LT	159
1da177e4 LT	160	/* Create new device info */
de6eb66b	161	port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
1da177e4 LT	162	if (!port_priv) {
	163	printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n");
	164	ret = -ENOMEM;
	165	goto error1;
	166	}
1da177e4	167
34816ad9 SH	168	/* Obtain send only MAD agent for SMI QP */
	169	port_priv->agent[0] = ib_register_mad_agent(device, port_num,
	170	IB_QPT_SMI, NULL, 0,
1da177e4	171	&agent_send_handler,
34816ad9 SH	172	NULL, NULL);
	173	if (IS_ERR(port_priv->agent[0])) {
	174	ret = PTR_ERR(port_priv->agent[0]);
1da177e4 LT	175	goto error2;
	176	}
	177
34816ad9 SH	178	/* Obtain send only MAD agent for GSI QP */
	179	port_priv->agent[1] = ib_register_mad_agent(device, port_num,
	180	IB_QPT_GSI, NULL, 0,
	181	&agent_send_handler,
	182	NULL, NULL);
	183	if (IS_ERR(port_priv->agent[1])) {
	184	ret = PTR_ERR(port_priv->agent[1]);
1da177e4 LT	185	goto error3;
	186	}
	187
1da177e4 LT	188	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
	189	list_add_tail(&port_priv->port_list, &ib_agent_port_list);
	190	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
	191
	192	return 0;
	193
1da177e4	194	error3:
34816ad9	195	ib_unregister_mad_agent(port_priv->agent[0]);
1da177e4 LT	196	error2:
	197	kfree(port_priv);
	198	error1:
	199	return ret;
	200	}
	201
	202	int ib_agent_port_close(struct ib_device *device, int port_num)
	203	{
	204	struct ib_agent_port_private *port_priv;
	205	unsigned long flags;
	206
	207	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
34816ad9	208	port_priv = __ib_get_agent_port(device, port_num);
1da177e4 LT	209	if (port_priv == NULL) {
	210	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
	211	printk(KERN_ERR SPFX "Port %d not found\n", port_num);
	212	return -ENODEV;
	213	}
	214	list_del(&port_priv->port_list);
	215	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
	216
34816ad9 SH	217	ib_unregister_mad_agent(port_priv->agent[1]);
34816ad9 SH	218	ib_unregister_mad_agent(port_priv->agent[0]);
1da177e4	219	kfree(port_priv);
1da177e4 LT	220	return 0;
1da177e4 LT	221	}