drivers/infiniband/core/opa_smi.h

   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
  42 enum smi_action opa_smi_handle_dr_smp_recv(struct opa_smp *smp, bool is_switch,
  43                                        int port_num, int phys_port_cnt);
  44 int opa_smi_get_fwd_port(struct opa_smp *smp);
  45 extern enum smi_forward_action opa_smi_check_forward_dr_smp(struct opa_smp *smp);
  46 extern 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  */
  53 static 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  */
  68 static 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_ */