drivers/infiniband/sw/rdmavt/mad.c

/*
 * Copyright(c) 2015 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
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 *    contributors may be used to endorse or promote products derived
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 */

#include "mad.h"

/**
 * rvt_process_mad - process an incoming MAD packet
 * @ibdev: the infiniband device this packet came in on
 * @mad_flags: MAD flags
 * @port: the port number this packet came in on
 * @in_wc: the work completion entry for this packet
 * @in_grh: the global route header for this packet
 * @in_mad: the incoming MAD
 * @out_mad: any outgoing MAD reply
 *
 * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
 * interested in processing.
 *
 * 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.
 */
int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
		    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)
{
	/*
	 * Drivers will need to provide a number of things. For exmaple counters
	 * will need to be maintained by the driver but shoud live in the rvt
	 * structure. More study will be needed to finalize the interface
	 * between drivers and rvt for mad packets.
	 *
	 *VT-DRIVER-API: ????
	 *
	 */
	return IB_MAD_RESULT_FAILURE;
}