Add PCIe dynamic bifurcation function for barreleye G2

Adds support to query the BMC (via sensor) to determine the
bifurcation settings of the PCI slots.

Resolves #125
Change-Id: Ibb4333140c6209a4a04c5f1a8adf3bd278899a8b
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/52992
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Matt Derksen <mderkse1@us.ibm.com>
Reviewed-by: DHRUVARAJ SUBHASH CHANDRAN <dhruvaraj@in.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/src/usr/isteps/istep10/sensor_based_bifurcation.C b/src/usr/isteps/istep10/sensor_based_bifurcation.C
new file mode 100644
index 000000000..cfa3d0415
--- /dev/null
+++ b/src/usr/isteps/istep10/sensor_based_bifurcation.C
@@ -0,0 +1,112 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/isteps/istep10/sensor_based_bifurcation.C $           */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2016,2018                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+/******************************************************************************/
+// Includes
+/******************************************************************************/
+#include <stdint.h>
+#include <fapi2/target.H>
+#include <targeting/targplatutil.H>
+#include "ipmi/ipmisensor.H"
+
+#include <trace/interface.H>
+#include <initservice/taskargs.H>
+#include <errl/errlentry.H>
+#include <isteps/hwpisteperror.H>
+#include <errl/errludtarget.H>
+#include <initservice/isteps_trace.H>
+#include <initservice/initserviceif.H>
+
+
+
+namespace   ISTEP_10
+{
+
+errlHndl_t _queryIopsToBifurcateAndPhbsToDisable(
+    TARGETING::ConstTargetHandle_t const       i_pecTarget,
+    bool&                                      o_iopBifurcate,
+    TARGETING::ATTR_PROC_PCIE_PHB_ACTIVE_type& o_disabledPhbsMask)
+{
+    TRACDCOMP( ISTEPS_TRACE::g_trac_isteps_trace,
+        ENTER_MRK "_queryIopsToBifurcateAndPhbsToDisable: PEC target "
+        "HUID = 0x%08X.", i_pecTarget ?
+            i_pecTarget->getAttr<TARGETING::ATTR_HUID>() : 0);
+
+    errlHndl_t pError = NULL;
+    o_iopBifurcate = false;
+    o_disabledPhbsMask = 0;
+
+    // In order to match the original template, I keep the do-while
+    // which is unnecessary.
+    do {
+        TARGETING::ATTR_PEC_PCIE_LANE_MASK_BIFURCATED_type laneMaskBifurcated = {0};
+        assert(i_pecTarget->tryGetAttr<
+               TARGETING::ATTR_PEC_PCIE_LANE_MASK_BIFURCATED>(
+               laneMaskBifurcated),"Failed to get "
+               "ATTR_PEC_PCIE_LANE_MASK_BIFURCATED attribute");
+        if (laneMaskBifurcated[0] || laneMaskBifurcated[1] || laneMaskBifurcated[2]
+            || laneMaskBifurcated[3]) {
+            TARGETING::Target* sys = nullptr;
+            TARGETING::targetService().getTopLevelTarget(sys);
+            assert(sys != nullptr);
+            uint32_t sensorNum = TARGETING::UTIL::getSensorNumber(sys,
+                                    TARGETING::SENSOR_NAME_PCI_BIFURCATED);
+
+            if (sensorNum != 0xFF)
+            {
+                SENSOR::getSensorReadingData bifurcatedData;
+                SENSOR::SensorBase bifurcatedSensor(
+                                  TARGETING::SENSOR_NAME_BIFURCATED, sys);
+                pError = bifurcatedSensor.readSensorData(bifurcatedData);
+                if (NULL == pError) {
+                    if ((bifurcatedData.event_status & 0x02) == 0x02) {
+                        o_iopBifurcate = true;
+                    }
+                }
+                else
+                {
+                    errlCommit(pError, ISTEP_COMP_ID);
+                }
+            }
+        }
+    // Extension point to return bifurcated IOPs and PHBs to disable.
+    // Assuming no extensions are added, the function returns no IOPs to
+    // bifurcate and no PHBs to disable
+
+    // If implemented, this function should only return error on software code
+    // bug.  Any other condition should result in IOPs not being bifurcated and
+    // host taking care of that condition.
+
+    } while(0);
+
+    TRACDCOMP( ISTEPS_TRACE::g_trac_isteps_trace,
+        EXIT_MRK "_queryIopsToBifurcateAndPhbsToDisable: EID = 0x%08X, "
+        "PLID = 0x%08X, RC = 0x%08X.",
+        ERRL_GETEID_SAFE(pError),ERRL_GETPLID_SAFE(pError),
+        ERRL_GETRC_SAFE(pError));
+
+    return pError;
+}
+
+};