FreeBSD/Linux Kernel Cross Reference
sys/ofed/drivers/infiniband/core/smi.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
      * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
      * Copyright (c) 2004 Intel Corporation.  All rights reserved.
      * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
      * Copyright (c) 2004-2007 Voltaire Corporation.  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.
     *
     * $FreeBSD$
     */
    
    #ifndef __SMI_H_
    #define __SMI_H_
    
    #include <rdma/ib_smi.h>
    
    enum smi_action {
            IB_SMI_DISCARD,
            IB_SMI_HANDLE
    };
    
    enum smi_forward_action {
            IB_SMI_LOCAL,   /* SMP should be completed up the stack */
            IB_SMI_SEND,    /* received DR SMP should be forwarded to the send queue */
            IB_SMI_FORWARD  /* SMP should be forwarded (for switches only) */
    };
    
    enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
                                           int port_num, int phys_port_cnt);
    int smi_get_fwd_port(struct ib_smp *smp);
    extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
    extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
                                                  bool is_switch, int port_num);
    
    /*
     * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
     * via process_mad
     */
    static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
                                                      struct ib_device *device)
    {
            /* C14-9:3 -- We're at the end of the DR segment of path */
            /* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
            return ((device->process_mad &&
                    !ib_get_smp_direction(smp) &&
                    (smp->hop_ptr == smp->hop_cnt + 1)) ?
                    IB_SMI_HANDLE : IB_SMI_DISCARD);
    }
    
    /*
     * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
     * via process_mad
     */
    static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
                                                       struct ib_device *device)
    {
            /* C14-13:3 -- We're at the end of the DR segment of path */
            /* C14-13:4 -- Hop Pointer == 0 -> give to SM */
            return ((device->process_mad &&
                    ib_get_smp_direction(smp) &&
                    !smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
    }
    
    #endif  /* __SMI_H_ */

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