diff options
Diffstat (limited to 'src/usr/isteps/nvdimm/nvdimmdd.C')
| -rwxr-xr-x | src/usr/isteps/nvdimm/nvdimmdd.C | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/usr/isteps/nvdimm/nvdimmdd.C b/src/usr/isteps/nvdimm/nvdimmdd.C index f2cee4a9c..5454fcb37 100755 --- a/src/usr/isteps/nvdimm/nvdimmdd.C +++ b/src/usr/isteps/nvdimm/nvdimmdd.C @@ -1583,4 +1583,175 @@ void getNVDIMMs( std::list<EEPROM::EepromInfo_t>& o_info ) o_info.size()); } +/** + * @brief Helper structure to keep track of memory ranges + */ +typedef struct memGroups_t +{ + Target* proc; + uint64_t membottom; + uint64_t memtop; + size_t group; +} memGroups_t; + +/** + * @brief Comparator for memGroups_t to allow sorting, sorts big-to-small + * @param[in] Left-side of compare + * @param[in] Right-side of compare + * @return true:left-side is bigger, false:right-side is bigger + */ +bool compare_memGroups(memGroups_t& i_ls, + memGroups_t& i_rs) +{ + return (i_ls.memtop > i_rs.memtop); +} + +/** + * @brief Check if given address is owned by nvdimms and return + * a new address that isn't if it was + */ +uint64_t get_top_addr_with_no_nvdimms( uint64_t i_topAddr ) +{ + // Default to just returning the same value we got (no nvdimms) + uint64_t o_topAddr = i_topAddr; + + // On a NVDIMM system we need to make sure that we don't + // use the NV memory for the HOMER (or other reserved + // memory). Depending on the specific memory layout + // the NV memory could be placed at the top of memory + // where we would normally land. + + // NVDIMMs are only on Nimbus systems + if( TARGETING::MODEL_NIMBUS + !=TARGETING::targetService().getProcessorModel() ) + { + return o_topAddr; + } + + // Skip all of this checking if the input value is weird + if( i_topAddr == 0 ) + { + return o_topAddr; + } + + // Build up a list of possible memory ranges + std::vector<memGroups_t> l_memGroups; + + ATTR_PROC_MEM_BASES_type l_memBases = {0}; + ATTR_PROC_MEM_SIZES_type l_memSizes = {0}; + const size_t l_numGroups = sizeof(ATTR_PROC_MEM_SIZES_type) + /sizeof(l_memSizes[0]); + + TARGETING::TargetHandleList l_procList; + TARGETING::getAllChips(l_procList, TARGETING::TYPE_PROC); + assert(l_procList.size() != 0, "Empty proc list returned!"); + for (auto l_pProc : l_procList) + { + // Get the memory group ranges under this proc + assert(l_pProc->tryGetAttr<ATTR_PROC_MEM_BASES>(l_memBases), + "Unable to get ATTR_PROC_MEM_BASES attribute"); + assert(l_pProc->tryGetAttr<ATTR_PROC_MEM_SIZES>(l_memSizes), + "Unable to get ATTR_PROC_MEM_SIZES attribute"); + + for (size_t l_grp=0; l_grp < l_numGroups; l_grp++) + { + // Non-zero size means that there is memory present + if (l_memSizes[l_grp]) + { + memGroups_t l_mg; + l_mg.proc = l_pProc; + l_mg.membottom = l_memBases[l_grp]; + l_mg.memtop = l_memBases[l_grp] + l_memSizes[l_grp]; + l_mg.group = l_grp; + l_memGroups.push_back(l_mg); + } + } + } + + + // Loop through the groups from biggest to smallest + // l_top_homer_addr should hit the biggest one first, then we'll + // find the next biggest if the first match has a nvdimm in it. + std::sort( l_memGroups.begin(), l_memGroups.end(), compare_memGroups ); + for( auto l_memGroup : l_memGroups ) + { + bool l_foundNvdimm = false; + + // Get the array of mcas/group from the attribute + // The attr contains 8 8-bit entries, one entry per group + // The bits specify which mcas are included in the group + ATTR_MSS_MEM_MC_IN_GROUP_type l_memMcGroup = {0}; + assert(l_memGroup.proc->tryGetAttr<ATTR_MSS_MEM_MC_IN_GROUP> + (l_memMcGroup), + "Unable to get ATTR_MSS_MEM_MC_IN_GROUP attribute"); + + // Get list of mcas under this proc + TargetHandleList l_mcaList; + getChildAffinityTargets( l_mcaList, + l_memGroup.proc, + CLASS_UNIT, + TYPE_MCA ); + + // Loop through the mcas on this proc + for (const auto & l_mcaTarget : l_mcaList) + { + // Get the chip unit for this mca + ATTR_CHIP_UNIT_type l_mcaUnit = 0; + l_mcaUnit = l_mcaTarget->getAttr<ATTR_CHIP_UNIT>(); + + // Check if this mca is included in the memory group + const uint8_t l_mcMask = 0x80; + if (l_memMcGroup[l_memGroup.group] & (l_mcMask >> l_mcaUnit)) + { + // Get the list of dimms under this mca + TargetHandleList l_dimmList; + getChildAffinityTargets( l_dimmList, + l_mcaTarget, + CLASS_NA, + TYPE_DIMM ); + for (const auto & l_dimmTarget : l_dimmList) + { + if( isNVDIMM(l_dimmTarget) ) + { + l_foundNvdimm = true; + break; + } + } + if( l_foundNvdimm ) { break; } + } + } // for all MCAs + + // If we didn't find a nvdimm, we have a candidate for a valid + // top address + if( l_foundNvdimm ) + { + // Check if top addr is in this group's memory range + if( (o_topAddr >= l_memGroup.membottom) && + (o_topAddr <= l_memGroup.memtop) ) + { + TRACFCOMP(g_trac_nvdimm,"get_top_addr_with_no_nvdimms> Chosen address 0x%llX has nvdimms, cannot be used", + o_topAddr); + o_topAddr = 0; + } + } + else + { + // Since we are sorted by size, this must be the + // largest group without a nvdimm + if( o_topAddr != l_memGroup.memtop ) + { + o_topAddr = l_memGroup.memtop; + TRACFCOMP(g_trac_nvdimm,"get_top_addr_with_no_nvdimms> Choosing address 0x%llX as new top", + o_topAddr); + break; + } + } + } //for all memgroups + + assert( o_topAddr != 0, "get_top_addr_with_no_nvdimms> No valid memory group found without a NVDIMM" ); + + return o_topAddr; +} + + } // end namespace NVDIMM |
