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/*
* Copyright(c) 2016 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <rdma/ib_mad.h>
#include "mad.h"
#include "vt.h"
/**
* rvt_process_mad - process an incoming MAD packet
* @ibdev: the infiniband device this packet came in on
* @mad_flags: MAD flags
* @port_num: the port number this packet came in on, 1 based from ib core
* @in_wc: the work completion entry for this packet
* @in_grh: the global route header for this packet
* @in: the incoming MAD
* @in_mad_size: size of the incoming MAD reply
* @out: any outgoing MAD reply
* @out_mad_size: size of the outgoing MAD reply
* @out_mad_pkey_index: unused
*
* Note that the verbs framework has already done the MAD sanity checks,
* and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
* MADs.
*
* This is called by the ib_mad module.
*
* Return: IB_MAD_RESULT_SUCCESS or error
*/
int rvt_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)
{
/*
* MAD processing is quite different between hfi1 and qib. Therefore
* this is expected to be provided by the driver. Other drivers in the
* future may choose to implement this but it should not be made into a
* requirement.
*/
if (ibport_num_to_idx(ibdev, port_num) < 0)
return -EINVAL;
return IB_MAD_RESULT_FAILURE;
}
static void rvt_send_mad_handler(struct ib_mad_agent *agent,
struct ib_mad_send_wc *mad_send_wc)
{
ib_free_send_mad(mad_send_wc->send_buf);
}
/**
* rvt_create_mad_agents - create mad agents
* @rdi: rvt dev struct
*
* If driver needs to be notified of mad agent creation then call back
*
* Return 0 on success
*/
int rvt_create_mad_agents(struct rvt_dev_info *rdi)
{
struct ib_mad_agent *agent;
struct rvt_ibport *rvp;
int p;
int ret;
for (p = 0; p < rdi->dparms.nports; p++) {
rvp = rdi->ports[p];
agent = ib_register_mad_agent(&rdi->ibdev, p + 1,
IB_QPT_SMI,
NULL, 0, rvt_send_mad_handler,
NULL, NULL, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto err;
}
rvp->send_agent = agent;
if (rdi->driver_f.notify_create_mad_agent)
rdi->driver_f.notify_create_mad_agent(rdi, p);
}
return 0;
err:
for (p = 0; p < rdi->dparms.nports; p++) {
rvp = rdi->ports[p];
if (rvp->send_agent) {
agent = rvp->send_agent;
rvp->send_agent = NULL;
ib_unregister_mad_agent(agent);
if (rdi->driver_f.notify_free_mad_agent)
rdi->driver_f.notify_free_mad_agent(rdi, p);
}
}
return ret;
}
/**
* rvt_free_mad_agents - free up mad agents
* @rdi: rvt dev struct
*
* If driver needs notification of mad agent removal make the call back
*/
void rvt_free_mad_agents(struct rvt_dev_info *rdi)
{
struct ib_mad_agent *agent;
struct rvt_ibport *rvp;
int p;
for (p = 0; p < rdi->dparms.nports; p++) {
rvp = rdi->ports[p];
if (rvp->send_agent) {
agent = rvp->send_agent;
rvp->send_agent = NULL;
ib_unregister_mad_agent(agent);
}
if (rvp->sm_ah) {
rdma_destroy_ah(&rvp->sm_ah->ibah,
RDMA_DESTROY_AH_SLEEPABLE);
rvp->sm_ah = NULL;
}
if (rdi->driver_f.notify_free_mad_agent)
rdi->driver_f.notify_free_mad_agent(rdi, p);
}
}
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