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![Dennis Dalessandro](/assets/img/avatar_default.png)
Add, remove, and otherwise clean up existing comments that are leftover from the initial code postings of rdmavt. Many of the comments were added to provide an idea on the direction we were thinking of going. Now that the design is solidified make a pass over and clean everything up. Also add details where lacking. Ensure all non static functions have nano comments. Reviewed-by: Jubin John <jubin.john@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
171 lines
5.2 KiB
C
171 lines
5.2 KiB
C
/*
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* Copyright(c) 2016 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <rdma/ib_mad.h>
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#include "mad.h"
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#include "vt.h"
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/**
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* rvt_process_mad - process an incoming MAD packet
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* @ibdev: the infiniband device this packet came in on
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* @mad_flags: MAD flags
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* @port_num: the port number this packet came in on, 1 based from ib core
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* @in_wc: the work completion entry for this packet
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* @in_grh: the global route header for this packet
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* @in_mad: the incoming MAD
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* @out_mad: any outgoing MAD reply
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*
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* Note that the verbs framework has already done the MAD sanity checks,
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* and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
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* MADs.
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*
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* This is called by the ib_mad module.
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*
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* Return: IB_MAD_RESULT_SUCCESS or error
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*/
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int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
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const struct ib_wc *in_wc, const struct ib_grh *in_grh,
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const struct ib_mad_hdr *in, size_t in_mad_size,
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struct ib_mad_hdr *out, size_t *out_mad_size,
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u16 *out_mad_pkey_index)
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{
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/*
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* MAD processing is quite different between hfi1 and qib. Therfore this
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* is expected to be provided by the driver. Other drivers in the future
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* may chose to implement this but it should not be made into a
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* requirement.
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*/
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if (ibport_num_to_idx(ibdev, port_num) < 0)
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return -EINVAL;
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return IB_MAD_RESULT_FAILURE;
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}
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static void rvt_send_mad_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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ib_free_send_mad(mad_send_wc->send_buf);
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}
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/**
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* rvt_create_mad_agents - create mad agents
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* @rdi: rvt dev struct
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*
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* If driver needs to be notified of mad agent creation then call back
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*
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* Return 0 on success
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*/
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int rvt_create_mad_agents(struct rvt_dev_info *rdi)
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{
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struct ib_mad_agent *agent;
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struct rvt_ibport *rvp;
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int p;
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int ret;
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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agent = ib_register_mad_agent(&rdi->ibdev, p + 1,
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IB_QPT_SMI,
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NULL, 0, rvt_send_mad_handler,
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NULL, NULL, 0);
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if (IS_ERR(agent)) {
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ret = PTR_ERR(agent);
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goto err;
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}
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rvp->send_agent = agent;
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if (rdi->driver_f.notify_create_mad_agent)
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rdi->driver_f.notify_create_mad_agent(rdi, p);
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}
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return 0;
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err:
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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if (rvp->send_agent) {
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agent = rvp->send_agent;
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rvp->send_agent = NULL;
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ib_unregister_mad_agent(agent);
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if (rdi->driver_f.notify_free_mad_agent)
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rdi->driver_f.notify_free_mad_agent(rdi, p);
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}
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}
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return ret;
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}
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/**
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* rvt_free_mad_agents - free up mad agents
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* @rdi: rvt dev struct
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*
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* If driver needs notification of mad agent removal make the call back
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*/
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void rvt_free_mad_agents(struct rvt_dev_info *rdi)
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{
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struct ib_mad_agent *agent;
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struct rvt_ibport *rvp;
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int p;
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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if (rvp->send_agent) {
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agent = rvp->send_agent;
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rvp->send_agent = NULL;
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ib_unregister_mad_agent(agent);
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}
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if (rvp->sm_ah) {
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ib_destroy_ah(&rvp->sm_ah->ibah);
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rvp->sm_ah = NULL;
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}
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if (rdi->driver_f.notify_free_mad_agent)
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rdi->driver_f.notify_free_mad_agent(rdi, p);
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}
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}
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