[deliverable/linux.git] / drivers / infiniband / hw / mthca / mthca_mad.c

/*
 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2004 Voltaire, 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/slab.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_smi.h>

#include "mthca_dev.h"
#include "mthca_cmd.h"

enum {
	MTHCA_VENDOR_CLASS1 = 0x9,
	MTHCA_VENDOR_CLASS2 = 0xa
};

static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
{
	struct ib_port_attr *tprops = NULL;
	int                  ret;

	tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
	if (!tprops)
		return -ENOMEM;

	ret = ib_query_port(&dev->ib_dev, port_num, tprops);
	if (ret) {
		printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n",
		       ret, dev->ib_dev.name, port_num);
		goto out;
	}

	dev->rate[port_num - 1] = tprops->active_speed *
				  ib_width_enum_to_int(tprops->active_width);

out:
	kfree(tprops);
	return ret;
}

static void update_sm_ah(struct mthca_dev *dev,
			 u8 port_num, u16 lid, u8 sl)
{
	struct ib_ah *new_ah;
	struct ib_ah_attr ah_attr;
	unsigned long flags;

	if (!dev->send_agent[port_num - 1][0])
		return;

	memset(&ah_attr, 0, sizeof ah_attr);
	ah_attr.dlid     = lid;
	ah_attr.sl       = sl;
	ah_attr.port_num = port_num;

	new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
			      &ah_attr);
	if (IS_ERR(new_ah))
		return;

	spin_lock_irqsave(&dev->sm_lock, flags);
	if (dev->sm_ah[port_num - 1])
		ib_destroy_ah(dev->sm_ah[port_num - 1]);
	dev->sm_ah[port_num - 1] = new_ah;
	spin_unlock_irqrestore(&dev->sm_lock, flags);
}

/*
 * Snoop SM MADs for port info and P_Key table sets, so we can
 * synthesize LID change and P_Key change events.
 */
static void smp_snoop(struct ib_device *ibdev,
		      u8 port_num,
		      const struct ib_mad *mad,
		      u16 prev_lid)
{
	struct ib_event event;

	if ((mad->mad_hdr.mgmt_class  == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
	     mad->mad_hdr.mgmt_class  == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	    mad->mad_hdr.method     == IB_MGMT_METHOD_SET) {
		if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
			struct ib_port_info *pinfo =
				(struct ib_port_info *) ((struct ib_smp *) mad)->data;
			u16 lid = be16_to_cpu(pinfo->lid);

			mthca_update_rate(to_mdev(ibdev), port_num);
			update_sm_ah(to_mdev(ibdev), port_num,
				     be16_to_cpu(pinfo->sm_lid),
				     pinfo->neighbormtu_mastersmsl & 0xf);

			event.device           = ibdev;
			event.element.port_num = port_num;

			if (pinfo->clientrereg_resv_subnetto & 0x80) {
				event.event    = IB_EVENT_CLIENT_REREGISTER;
				ib_dispatch_event(&event);
			}

			if (prev_lid != lid) {
				event.event    = IB_EVENT_LID_CHANGE;
				ib_dispatch_event(&event);
			}
		}

		if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
			event.device           = ibdev;
			event.event            = IB_EVENT_PKEY_CHANGE;
			event.element.port_num = port_num;
			ib_dispatch_event(&event);
		}
	}
}

static void node_desc_override(struct ib_device *dev,
			       struct ib_mad *mad)
{
	if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
	     mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	    mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
	    mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
		mutex_lock(&to_mdev(dev)->cap_mask_mutex);
		memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
		mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
	}
}

static void forward_trap(struct mthca_dev *dev,
			 u8 port_num,
			 const struct ib_mad *mad)
{
	int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
	struct ib_mad_send_buf *send_buf;
	struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
	int ret;
	unsigned long flags;

	if (agent) {
		send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
					      IB_MGMT_MAD_DATA, GFP_ATOMIC,
					      IB_MGMT_BASE_VERSION);
		if (IS_ERR(send_buf))
			return;
		/*
		 * We rely here on the fact that MLX QPs don't use the
		 * address handle after the send is posted (this is
		 * wrong following the IB spec strictly, but we know
		 * it's OK for our devices).
		 */
		spin_lock_irqsave(&dev->sm_lock, flags);
		memcpy(send_buf->mad, mad, sizeof *mad);
		if ((send_buf->ah = dev->sm_ah[port_num - 1]))
			ret = ib_post_send_mad(send_buf, NULL);
		else
			ret = -EINVAL;
		spin_unlock_irqrestore(&dev->sm_lock, flags);

		if (ret)
			ib_free_send_mad(send_buf);
	}
}

int mthca_process_mad(struct ib_device *ibdev,
		      int mad_flags,
		      u8 port_num,
		      const struct ib_wc *in_wc,
		      const struct ib_grh *in_grh,
		      const struct ib_mad_hdr *in, size_t in_mad_size,
		      struct ib_mad_hdr *out, size_t *out_mad_size,
		      u16 *out_mad_pkey_index)
{
	int err;
	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
	u16 prev_lid = 0;
	struct ib_port_attr pattr;
	const struct ib_mad *in_mad = (const struct ib_mad *)in;
	struct ib_mad *out_mad = (struct ib_mad *)out;

	BUG_ON(in_mad_size != sizeof(*in_mad) ||
	       *out_mad_size != sizeof(*out_mad));

	/* Forward locally generated traps to the SM */
	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
	    slid == 0) {
		forward_trap(to_mdev(ibdev), port_num, in_mad);
		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
	}

	/*
	 * Only handle SM gets, sets and trap represses for SM class
	 *
	 * Only handle PMA and Mellanox vendor-specific class gets and
	 * sets for other classes.
	 */
	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
	    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
		if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
			return IB_MAD_RESULT_SUCCESS;

		/*
		 * Don't process SMInfo queries or vendor-specific
		 * MADs -- the SMA can't handle them.
		 */
		if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
		    ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
		     IB_SMP_ATTR_VENDOR_MASK))
			return IB_MAD_RESULT_SUCCESS;
	} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
		   in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1     ||
		   in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
		if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
		    in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
			return IB_MAD_RESULT_SUCCESS;
	} else
		return IB_MAD_RESULT_SUCCESS;
	if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
	     in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	    in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
	    in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
	    !ib_query_port(ibdev, port_num, &pattr))
		prev_lid = pattr.lid;

	err = mthca_MAD_IFC(to_mdev(ibdev),
			    mad_flags & IB_MAD_IGNORE_MKEY,
			    mad_flags & IB_MAD_IGNORE_BKEY,
			    port_num, in_wc, in_grh, in_mad, out_mad);
	if (err == -EBADMSG)
		return IB_MAD_RESULT_SUCCESS;
	else if (err) {
		mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
		return IB_MAD_RESULT_FAILURE;
	}

	if (!out_mad->mad_hdr.status) {
		smp_snoop(ibdev, port_num, in_mad, prev_lid);
		node_desc_override(ibdev, out_mad);
	}

	/* set return bit in status of directed route responses */
	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
		out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);

	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
		/* no response for trap repress */
		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;

	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}

static void send_handler(struct ib_mad_agent *agent,
			 struct ib_mad_send_wc *mad_send_wc)
{
	ib_free_send_mad(mad_send_wc->send_buf);
}

int mthca_create_agents(struct mthca_dev *dev)
{
	struct ib_mad_agent *agent;
	int p, q;
	int ret;

	spin_lock_init(&dev->sm_lock);

	for (p = 0; p < dev->limits.num_ports; ++p)
		for (q = 0; q <= 1; ++q) {
			agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
						      q ? IB_QPT_GSI : IB_QPT_SMI,
						      NULL, 0, send_handler,
						      NULL, NULL, 0);
			if (IS_ERR(agent)) {
				ret = PTR_ERR(agent);
				goto err;
			}
			dev->send_agent[p][q] = agent;
		}


	for (p = 1; p <= dev->limits.num_ports; ++p) {
		ret = mthca_update_rate(dev, p);
		if (ret) {
			mthca_err(dev, "Failed to obtain port %d rate."
				  " aborting.\n", p);
			goto err;
		}
	}

	return 0;

err:
	for (p = 0; p < dev->limits.num_ports; ++p)
		for (q = 0; q <= 1; ++q)
			if (dev->send_agent[p][q])
				ib_unregister_mad_agent(dev->send_agent[p][q]);

	return ret;
}

void mthca_free_agents(struct mthca_dev *dev)
{
	struct ib_mad_agent *agent;
	int p, q;

	for (p = 0; p < dev->limits.num_ports; ++p) {
		for (q = 0; q <= 1; ++q) {
			agent = dev->send_agent[p][q];
			dev->send_agent[p][q] = NULL;
			ib_unregister_mad_agent(agent);
		}

		if (dev->sm_ah[p])
			ib_destroy_ah(dev->sm_ah[p]);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (c) 2004 Topspin Communications. All rights reserved.
2a1d9b7f RD	3	* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
2a1d9b7f RD	4	* Copyright (c) 2004 Voltaire, Inc. All rights reserved.
1da177e4 LT	5	*
	6	* This software is available to you under a choice of one of two
	7	* licenses. You may choose to be licensed under the terms of the GNU
	8	* General Public License (GPL) Version 2, available from the file
	9	* COPYING in the main directory of this source tree, or the
	10	* OpenIB.org BSD license below:
	11	*
	12	* Redistribution and use in source and binary forms, with or
	13	* without modification, are permitted provided that the following
	14	* conditions are met:
	15	*
	16	* - Redistributions of source code must retain the above
	17	* copyright notice, this list of conditions and the following
	18	* disclaimer.
	19	*
	20	* - Redistributions in binary form must reproduce the above
	21	* copyright notice, this list of conditions and the following
	22	* disclaimer in the documentation and/or other materials
	23	* provided with the distribution.
	24	*
	25	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	26	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	27	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	28	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	29	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	30	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	31	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	32	* SOFTWARE.
1da177e4 LT	33	*/
1da177e4 LT	34
4e57b681 TS	35	#include <linux/string.h>
	36	#include <linux/slab.h>
	37
a4d61e84 RD	38	#include <rdma/ib_verbs.h>
	39	#include <rdma/ib_mad.h>
	40	#include <rdma/ib_smi.h>
1da177e4 LT	41
	42	#include "mthca_dev.h"
	43	#include "mthca_cmd.h"
	44
	45	enum {
	46	MTHCA_VENDOR_CLASS1 = 0x9,
	47	MTHCA_VENDOR_CLASS2 = 0xa
	48	};
	49
415dcd95	50	static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
bf6a9e31 JM	51	{
	52	struct ib_port_attr *tprops = NULL;
	53	int ret;
	54
	55	tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
	56	if (!tprops)
	57	return -ENOMEM;
	58
	59	ret = ib_query_port(&dev->ib_dev, port_num, tprops);
	60	if (ret) {
	61	printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n",
	62	ret, dev->ib_dev.name, port_num);
	63	goto out;
	64	}
	65
	66	dev->rate[port_num - 1] = tprops->active_speed *
	67	ib_width_enum_to_int(tprops->active_width);
	68
	69	out:
	70	kfree(tprops);
	71	return ret;
	72	}
	73
1da177e4 LT	74	static void update_sm_ah(struct mthca_dev *dev,
	75	u8 port_num, u16 lid, u8 sl)
	76	{
	77	struct ib_ah *new_ah;
	78	struct ib_ah_attr ah_attr;
	79	unsigned long flags;
	80
	81	if (!dev->send_agent[port_num - 1][0])
	82	return;
	83
	84	memset(&ah_attr, 0, sizeof ah_attr);
	85	ah_attr.dlid = lid;
	86	ah_attr.sl = sl;
	87	ah_attr.port_num = port_num;
	88
	89	new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
	90	&ah_attr);
	91	if (IS_ERR(new_ah))
	92	return;
	93
	94	spin_lock_irqsave(&dev->sm_lock, flags);
	95	if (dev->sm_ah[port_num - 1])
	96	ib_destroy_ah(dev->sm_ah[port_num - 1]);
	97	dev->sm_ah[port_num - 1] = new_ah;
	98	spin_unlock_irqrestore(&dev->sm_lock, flags);
	99	}
	100
	101	/*
	102	* Snoop SM MADs for port info and P_Key table sets, so we can
	103	* synthesize LID change and P_Key change events.
	104	*/
	105	static void smp_snoop(struct ib_device *ibdev,
	106	u8 port_num,
a97e2d86	107	const struct ib_mad *mad,
270b8b85	108	u16 prev_lid)
1da177e4 LT	109	{
	110	struct ib_event event;
	111
	112	if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED \|\|
	113	mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	114	mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
	115	if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
12bbb2b7 LA	116	struct ib_port_info *pinfo =
12bbb2b7 LA	117	(struct ib_port_info ) ((struct ib_smp ) mad)->data;
270b8b85	118	u16 lid = be16_to_cpu(pinfo->lid);
12bbb2b7	119
bf6a9e31	120	mthca_update_rate(to_mdev(ibdev), port_num);
1da177e4	121	update_sm_ah(to_mdev(ibdev), port_num,
b2707573	122	be16_to_cpu(pinfo->sm_lid),
12bbb2b7	123	pinfo->neighbormtu_mastersmsl & 0xf);
1da177e4 LT	124
1da177e4 LT	125	event.device = ibdev;
1da177e4	126	event.element.port_num = port_num;
12bbb2b7	127
270b8b85	128	if (pinfo->clientrereg_resv_subnetto & 0x80) {
12bbb2b7	129	event.event = IB_EVENT_CLIENT_REREGISTER;
270b8b85 MS	130	ib_dispatch_event(&event);
270b8b85 MS	131	}
12bbb2b7	132
270b8b85 MS	133	if (prev_lid != lid) {
	134	event.event = IB_EVENT_LID_CHANGE;
	135	ib_dispatch_event(&event);
	136	}
1da177e4 LT	137	}
	138
	139	if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
	140	event.device = ibdev;
	141	event.event = IB_EVENT_PKEY_CHANGE;
	142	event.element.port_num = port_num;
	143	ib_dispatch_event(&event);
	144	}
	145	}
	146	}
	147
6dfc3901 RD	148	static void node_desc_override(struct ib_device *dev,
	149	struct ib_mad *mad)
	150	{
	151	if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED \|\|
	152	mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	153	mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
	154	mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
	155	mutex_lock(&to_mdev(dev)->cap_mask_mutex);
	156	memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
	157	mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
	158	}
	159	}
	160
1da177e4 LT	161	static void forward_trap(struct mthca_dev *dev,
1da177e4 LT	162	u8 port_num,
a97e2d86	163	const struct ib_mad *mad)
1da177e4 LT	164	{
1da177e4 LT	165	int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
34816ad9	166	struct ib_mad_send_buf *send_buf;
1da177e4 LT	167	struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
	168	int ret;
	169	unsigned long flags;
	170
	171	if (agent) {
34816ad9	172	send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
da2dfaa3 IW	173	IB_MGMT_MAD_DATA, GFP_ATOMIC,
da2dfaa3 IW	174	IB_MGMT_BASE_VERSION);
d0444f15 DC	175	if (IS_ERR(send_buf))
d0444f15 DC	176	return;
1da177e4 LT	177	/*
	178	* We rely here on the fact that MLX QPs don't use the
	179	* address handle after the send is posted (this is
	180	* wrong following the IB spec strictly, but we know
	181	* it's OK for our devices).
	182	*/
	183	spin_lock_irqsave(&dev->sm_lock, flags);
34816ad9 SH	184	memcpy(send_buf->mad, mad, sizeof *mad);
	185	if ((send_buf->ah = dev->sm_ah[port_num - 1]))
	186	ret = ib_post_send_mad(send_buf, NULL);
1da177e4 LT	187	else
	188	ret = -EINVAL;
	189	spin_unlock_irqrestore(&dev->sm_lock, flags);
	190
34816ad9 SH	191	if (ret)
34816ad9 SH	192	ib_free_send_mad(send_buf);
1da177e4 LT	193	}
	194	}
	195
	196	int mthca_process_mad(struct ib_device *ibdev,
	197	int mad_flags,
	198	u8 port_num,
a97e2d86 IW	199	const struct ib_wc *in_wc,
a97e2d86 IW	200	const struct ib_grh *in_grh,
4cd7c947 IW	201	const struct ib_mad_hdr *in, size_t in_mad_size,
	202	struct ib_mad_hdr out, size_t out_mad_size,
	203	u16 *out_mad_pkey_index)
1da177e4 LT	204	{
1da177e4 LT	205	int err;
97f52eb4	206	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
270b8b85 MS	207	u16 prev_lid = 0;
270b8b85 MS	208	struct ib_port_attr pattr;
4cd7c947 IW	209	const struct ib_mad in_mad = (const struct ib_mad )in;
	210	struct ib_mad out_mad = (struct ib_mad )out;
	211
	212	BUG_ON(in_mad_size != sizeof(*in_mad) \|\|
	213	out_mad_size != sizeof(out_mad));
1da177e4 LT	214
	215	/* Forward locally generated traps to the SM */
	216	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
	217	slid == 0) {
	218	forward_trap(to_mdev(ibdev), port_num, in_mad);
	219	return IB_MAD_RESULT_SUCCESS \| IB_MAD_RESULT_CONSUMED;
	220	}
	221
	222	/*
	223	* Only handle SM gets, sets and trap represses for SM class
	224	*
	225	* Only handle PMA and Mellanox vendor-specific class gets and
	226	* sets for other classes.
	227	*/
	228	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED \|\|
	229	in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
	230	if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
	231	in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
	232	in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
	233	return IB_MAD_RESULT_SUCCESS;
	234
	235	/*
	236	* Don't process SMInfo queries or vendor-specific
	237	* MADs -- the SMA can't handle them.
	238	*/
	239	if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO \|\|
	240	((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
	241	IB_SMP_ATTR_VENDOR_MASK))
	242	return IB_MAD_RESULT_SUCCESS;
	243	} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT \|\|
	244	in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 \|\|
	245	in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
	246	if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
	247	in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
	248	return IB_MAD_RESULT_SUCCESS;
	249	} else
	250	return IB_MAD_RESULT_SUCCESS;
270b8b85 MS	251	if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED \|\|
	252	in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
	253	in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
	254	in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
	255	!ib_query_port(ibdev, port_num, &pattr))
	256	prev_lid = pattr.lid;
1da177e4 LT	257
	258	err = mthca_MAD_IFC(to_mdev(ibdev),
	259	mad_flags & IB_MAD_IGNORE_MKEY,
	260	mad_flags & IB_MAD_IGNORE_BKEY,
cdb73db0 GR	261	port_num, in_wc, in_grh, in_mad, out_mad);
cdb73db0 GR	262	if (err == -EBADMSG)
1da177e4	263	return IB_MAD_RESULT_SUCCESS;
cdb73db0 GR	264	else if (err) {
cdb73db0 GR	265	mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
1da177e4 LT	266	return IB_MAD_RESULT_FAILURE;
	267	}
	268
6dfc3901	269	if (!out_mad->mad_hdr.status) {
270b8b85	270	smp_snoop(ibdev, port_num, in_mad, prev_lid);
6dfc3901 RD	271	node_desc_override(ibdev, out_mad);
6dfc3901 RD	272	}
1da177e4 LT	273
	274	/* set return bit in status of directed route responses */
	275	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
	276	out_mad->mad_hdr.status \|= cpu_to_be16(1 << 15);
	277
	278	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
	279	/* no response for trap repress */
	280	return IB_MAD_RESULT_SUCCESS \| IB_MAD_RESULT_CONSUMED;
	281
	282	return IB_MAD_RESULT_SUCCESS \| IB_MAD_RESULT_REPLY;
	283	}
	284
	285	static void send_handler(struct ib_mad_agent *agent,
	286	struct ib_mad_send_wc *mad_send_wc)
	287	{
34816ad9	288	ib_free_send_mad(mad_send_wc->send_buf);
1da177e4 LT	289	}
	290
	291	int mthca_create_agents(struct mthca_dev *dev)
	292	{
	293	struct ib_mad_agent *agent;
	294	int p, q;
bf6a9e31	295	int ret;
1da177e4 LT	296
	297	spin_lock_init(&dev->sm_lock);
	298
	299	for (p = 0; p < dev->limits.num_ports; ++p)
	300	for (q = 0; q <= 1; ++q) {
	301	agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
	302	q ? IB_QPT_GSI : IB_QPT_SMI,
	303	NULL, 0, send_handler,
0f29b46d	304	NULL, NULL, 0);
bf6a9e31 JM	305	if (IS_ERR(agent)) {
bf6a9e31 JM	306	ret = PTR_ERR(agent);
1da177e4	307	goto err;
bf6a9e31	308	}
1da177e4 LT	309	dev->send_agent[p][q] = agent;
	310	}
	311
bf6a9e31 JM	312
	313	for (p = 1; p <= dev->limits.num_ports; ++p) {
	314	ret = mthca_update_rate(dev, p);
	315	if (ret) {
	316	mthca_err(dev, "Failed to obtain port %d rate."
	317	" aborting.\n", p);
	318	goto err;
	319	}
	320	}
	321
1da177e4 LT	322	return 0;
	323
	324	err:
	325	for (p = 0; p < dev->limits.num_ports; ++p)
	326	for (q = 0; q <= 1; ++q)
	327	if (dev->send_agent[p][q])
	328	ib_unregister_mad_agent(dev->send_agent[p][q]);
	329
bf6a9e31	330	return ret;
1da177e4 LT	331	}
1da177e4 LT	332
f4f3d0f0	333	void mthca_free_agents(struct mthca_dev *dev)
1da177e4 LT	334	{
	335	struct ib_mad_agent *agent;
	336	int p, q;
	337
	338	for (p = 0; p < dev->limits.num_ports; ++p) {
	339	for (q = 0; q <= 1; ++q) {
	340	agent = dev->send_agent[p][q];
	341	dev->send_agent[p][q] = NULL;
	342	ib_unregister_mad_agent(agent);
	343	}
	344
	345	if (dev->sm_ah[p])
	346	ib_destroy_ah(dev->sm_ah[p]);
	347	}
	348	}