/*
   * 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.
   *

   */
  
  #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_ */