src/vendorcode/amd/agesa/f16kb/Proc/GNB/Modules/GnbPcieInitLibV5/PcieTopologyServicesV5.c

/* $NoKeywords:$ */
/**
 * @file
 *
 * PCIe topology initialization service procedures.
 *
 *
 *
 * @xrefitem bom "File Content Label" "Release Content"
 * @e project:     AGESA
 * @e sub-project: GNB
 * @e \$Revision: 84150 $   @e \$Date: 2012-12-12 15:46:25 -0600 (Wed, 12 Dec 2012) $
 *
 */
/*
*****************************************************************************
*
 * Copyright (c) 2008 - 2013, Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * 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.
 *     * Neither the name of Advanced Micro Devices, Inc. nor the names of
 *       its contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ***************************************************************************
*
*/

/*----------------------------------------------------------------------------------------
 *                             M O D U L E S    U S E D
 *----------------------------------------------------------------------------------------
 */
#include  "AGESA.h"
#include  "Ids.h"
#include  "amdlib.h"
#include  "Gnb.h"
#include  "GnbPcie.h"
#include  "GnbPcieFamServices.h"
#include  "GnbCommonLib.h"
#include  "GnbPcieConfig.h"
#include  "GnbPcieInitLibV1.h"
#include  "GnbPcieInitLibV5.h"
#include  "GnbRegistersCommonV2.h"
#include  "Filecode.h"
#define FILECODE PROC_GNB_MODULES_GNBPCIEINITLIBV5_PCIETOPOLOGYSERVICESV5_FILECODE

/*----------------------------------------------------------------------------------------
 *                   D E F I N I T I O N S    A N D    M A C R O S
 *----------------------------------------------------------------------------------------
 */


/*----------------------------------------------------------------------------------------
 *                  T Y P E D E F S     A N D     S T R U C T U  R E S
 *----------------------------------------------------------------------------------------
 */

/*----------------------------------------------------------------------------------------
 *           P R O T O T Y P E S     O F     L O C A L     F U  N C T I O N S
 *----------------------------------------------------------------------------------------
 */


/*----------------------------------------------------------------------------------------*/
/**
 * Lanes enable/disable control
 *
 * @param[in]   Control             Lane control action
 * @param[in]   LaneBitMap          Core lanes bitmap
 * @param[in]   Wrapper             Pointer to Wrapper config descriptor
 * @param[in]   Pcie                Pointer to global PCIe configuration
 */
VOID
PcieTopologyLaneControlV5 (
  IN      LANE_CONTROL          Control,
  IN      UINT32                LaneBitMap,
  IN      PCIe_WRAPPER_CONFIG   *Wrapper,
  IN      PCIe_PLATFORM_CONFIG  *Pcie
    )
{
  D0F0xE4_WRAP_8029_STRUCT  D0F0xE4_WRAP_8029;
  D0F0xE4_WRAP_8029.Value = PcieRegisterRead (
                            Wrapper,
                            WRAP_SPACE (Wrapper->WrapId, D0F0xE4_WRAP_8029_ADDRESS),
                            Pcie
                            );

  if (Control == EnableLanes) {
    D0F0xE4_WRAP_8029.Value |= LaneBitMap;
  } else if (Control == DisableLanes) {
    D0F0xE4_WRAP_8029.Value &= (~LaneBitMap);
  }
  D0F0xE4_WRAP_8029.Value &= ((1 << Wrapper->NumberOfLanes) - 1);
  PcieRegisterWrite (
    Wrapper,
    WRAP_SPACE (Wrapper->WrapId, D0F0xE4_WRAP_8029_ADDRESS),
    D0F0xE4_WRAP_8029.Value,
    TRUE,
    Pcie
    );
}

/*----------------------------------------------------------------------------------------*/
/**
 * Reduce link width
 *
 *
 * @param[in]  LinkWidth           Link width
 * @param[in]  Engine              Pointer to Engine config descriptor
 * @param[in]  Pcie                Pointer to global PCIe configuration
 */
VOID
PcieTopologyReduceLinkWidthV5 (
  IN      UINT8                 LinkWidth,
  IN      PCIe_ENGINE_CONFIG    *Engine,
  IN      PCIe_PLATFORM_CONFIG  *Pcie
  )
{
  PCIe_WRAPPER_CONFIG       *Wrapper;
  UINT32                    LinkReversed;
  UINT8                     DeltaLinkWidthBitmap;
  UINT32                    LanesToDisable;
  Wrapper = PcieConfigGetParentWrapper (Engine);
  LinkReversed = PcieUtilIsLinkReversed (TRUE, Engine, Pcie);

  DeltaLinkWidthBitmap = (1 << (PcieConfigGetNumberOfCoreLane (Engine) - LinkWidth)) - 1;
  LanesToDisable = (DeltaLinkWidthBitmap << ((LinkReversed == 1) ? Engine->Type.Port.StartCoreLane : (Engine->Type.Port.StartCoreLane +  LinkWidth)));

  PcieTopologyLaneControlV5 (
    DisableLanes,
    LanesToDisable,
    Wrapper,
    Pcie
    );
}