Add Reset to TPM's I2C Bus for MPIPLs

This commit updates the general I2C reset function to only reset
certain engine(s) of the I2C master.  This new functionality is
then used to reset all of the processor I2C engines that can
drive the TPMs on MPIPLs.

Change-Id: Ie19e93233b5012b69d59bfc3f485ce2914d665da
CQ:SW419116
Backport:release-fips910
Backport:release-fips900
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/54840
CI-Ready: Nicholas E. Bofferding <bofferdn@us.ibm.com>
CI-Ready: Marshall J. Wilks <mjwilks@us.ibm.com>
CI-Ready: Michael Baiocchi <mbaiocch@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Marshall J. Wilks <mjwilks@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: ILYA SMIRNOV <ismirno@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/src/usr/secureboot/trusted/trustedboot.C b/src/usr/secureboot/trusted/trustedboot.C
index 0c1e9e974..43ce1f330 100644
--- a/src/usr/secureboot/trusted/trustedboot.C
+++ b/src/usr/secureboot/trusted/trustedboot.C
@@ -52,6 +52,7 @@
 #include <config.h>
 #include <devicefw/driverif.H>
 #include <i2c/tpmddif.H>
+#include <i2c/i2cif.H>
 #include "trustedboot.H"
 #include "trustedTypes.H"
 #include "trustedbootCmds.H"
@@ -274,6 +275,33 @@ void* host_update_master_tpm( void *io_pArgs )
             if(   hwasState.present
                && hwasState.functional)
             {
+                // If MPIPL do I2C Reset to any processor's I2C engine that is
+                // driving the TPMs
+                TARGETING::Target* sys = nullptr;
+                (void) tS.getTopLevelTarget( sys );
+                assert(sys, "host_update_master_tpm() system target is nullptr");
+
+                if (sys->getAttr<TARGETING::ATTR_IS_MPIPL_HB>())
+                {
+                   err = I2C::i2cResetActiveMasters(
+                             I2C::I2C_PROC_HOST,
+                             true,
+                             I2C::i2cEngineToEngineSelect(tpmData.engine));
+
+                   if (nullptr != err)
+                   {
+                       // Commit log and continue
+                       TRACFCOMP(g_trac_trustedboot,ERR_MRK
+                                 "host_update_master_tpm(): Committing I2C "
+                                 "Reset Fail plid=0x%X but continuing",
+                                 err->plid());
+                       err->collectTrace(TRBOOT_COMP_NAME);
+                       errlCommit(err, TRBOOT_COMP_ID);
+                       err = nullptr;
+                   }
+
+                }
+
                 // API call will set TPM init attempted appropriately
                 tpmInitialize(pPrimaryTpm);
             }