LXR linux/drivers/infiniband/core/opa

   1/*
   2 * Copyright (c) 2014 Intel Corporation.  All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 *
  32 */
  33
  34#ifndef __OPA_SMI_H_
  35#define __OPA_SMI_H_
  36
  37#include <rdma/ib_smi.h>
  38#include <rdma/opa_smi.h>
  39
  40#include "smi.h"
  41
  42enum smi_action opa_smi_handle_dr_smp_recv(struct opa_smp *smp, bool is_switch,
  43                                       int port_num, int phys_port_cnt);
  44int opa_smi_get_fwd_port(struct opa_smp *smp);
  45extern enum smi_forward_action opa_smi_check_forward_dr_smp(struct opa_smp *smp);
  46extern enum smi_action opa_smi_handle_dr_smp_send(struct opa_smp *smp,
  47                                              bool is_switch, int port_num);
  48
  49/*
  50 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
  51 * via process_mad
  52 */
  53static inline enum smi_action opa_smi_check_local_smp(struct opa_smp *smp,
  54                                                      struct ib_device *device)
  55{
  56        /* C14-9:3 -- We're at the end of the DR segment of path */
  57        /* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
  58        return (device->ops.process_mad &&
  59                !opa_get_smp_direction(smp) &&
  60                (smp->hop_ptr == smp->hop_cnt + 1)) ?
  61                IB_SMI_HANDLE : IB_SMI_DISCARD;
  62}
  63
  64/*
  65 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
  66 * via process_mad
  67 */
  68static inline enum smi_action opa_smi_check_local_returning_smp(struct opa_smp *smp,
  69                                                                struct ib_device *device)
  70{
  71        /* C14-13:3 -- We're at the end of the DR segment of path */
  72        /* C14-13:4 -- Hop Pointer == 0 -> give to SM */
  73        return (device->ops.process_mad &&
  74                opa_get_smp_direction(smp) &&
  75                !smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD;
  76}
  77
  78#endif  /* __OPA_SMI_H_ */
  79