Add method to erase SPD on all dimms via attribute override

Change-Id: I3fb0759ef99b427cb043badddc1c3fd2afe1ae62
RTC: 132714
Depends-on: I4c74d3a6d5d900967b6add4e9edc7fa286e93a64
Depends-on: I04e83ee2a38a5be3b17fd5578709ed5b64127b83
Depends-on: I31c015962f39342d0d1d9d575fd0c4569496918c
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/19891
Tested-by: Jenkins Server
Tested-by: Jenkins OP Build CI
Tested-by: Jenkins OP HW
Reviewed-by: Thi N. Tran <thi@us.ibm.com>
Reviewed-by: MATTHEW A. PLOETZ <maploetz@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/usr/vpd/dimmPres.C b/src/usr/vpd/dimmPres.C
index cc7d19255..8c54eca75 100755
--- a/src/usr/vpd/dimmPres.C
+++ b/src/usr/vpd/dimmPres.C
@@ -212,7 +212,58 @@ errlHndl_t dimmPresenceDetect( DeviceFW::OperationType i_opType,
             {
                 //populate serial and part number attributes
                 SPD::setPartAndSerialNumberAttributes( i_target );
+            }
+
+            // Read ATTR_CLEAR_DIMM_SPD_ENABLE attribute
+            TARGETING::Target* l_sys = NULL;
+            TARGETING::targetService().getTopLevelTarget(l_sys);
+
+            TARGETING::ATTR_CLEAR_DIMM_SPD_ENABLE_type l_clearSPD =
+                l_sys->getAttr<TARGETING::ATTR_CLEAR_DIMM_SPD_ENABLE>();
+
+            // If SPD clear is enabled then write 0's into magic word for 
+            // DIMM_BAD_DQ_DATA keyword
+            // Note: If there's an error from performing the clearing,
+            // just log the error and continue.
+            if (l_clearSPD)
+            {
+                size_t l_size = 0;
+
+                // Do a read to get the DIMM_BAD_DQ_DATA keyword size
+                err = deviceRead(i_target, NULL, l_size,
+                                 DEVICE_SPD_ADDRESS( DIMM_BAD_DQ_DATA ));
+                if (err)
+                {
+                    TRACFCOMP(g_trac_spd, "dimmPresenceDetect - "
+                        "Error reading DIMM_BAD_DQ_DATA keyword size");
+                    errlCommit( err, VPD_COMP_ID );
+                }
+                else
+                {
+                    // Clear the data
+                    TRACFCOMP( g_trac_spd, "Clearing out BAD_DQ_DATA SPD on "
+                               "DIMM HUID 0x%X",
+                               TARGETING::get_huid(i_target));
+
+                    uint8_t * l_data = static_cast<uint8_t*>(malloc( l_size ));
+                    memset(l_data, 0, l_size);
+
+                    err = deviceWrite(i_target, l_data, l_size,
+                                     DEVICE_SPD_ADDRESS( DIMM_BAD_DQ_DATA ));
+                    if (err)
+                    {
+                        TRACFCOMP( g_trac_spd, "Error trying to clear SPD on "
+                                   "DIMM HUID 0x%X",
+                                   TARGETING::get_huid(i_target));
+                        errlCommit( err, VPD_COMP_ID );
+                    }
 
+                    // Free the memory
+                    if (NULL != l_data)
+                    {
+                        free(l_data);
+                    }
+                }
             }
         }