mss_bad_bits.H

/* IBM_PROLOG_BEGIN_TAG                                                   */
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/* $Source: src/import/generic/memory/lib/utils/mss_bad_bits.H $          */
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/* OpenPOWER HostBoot Project                                             */
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/* [+] International Business Machines Corp.                              */
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///
/// @file mss_bad_bits.C
/// @brief Contains the generic bad bits logic
///
// *HWP HWP Owner: Stephen Glancy <sglancy@us.ibm.com>
// *HWP HWP Backup: Andre Marin <aamarin@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 3
// *HWP Consumed by: FSP:HB

#ifndef _MSS_BAD_BITS_H_
#define _MSS_BAD_BITS_H_

#include <fapi2.H>
#include <generic/memory/lib/utils/shared/mss_generic_consts.H>
#include <generic/memory/lib/utils/find.H>
#include <generic/memory/lib/utils/mss_generic_check.H>
#include <generic/memory/lib/mss_generic_attribute_setters.H>

namespace mss
{

///
/// @brief A generic bad bits setter
/// @tparam MC type memory controller type
/// @param[in] i_target the fapi2 target oon which training was conducted
/// @param[in] i_array the bad bits to set
/// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if bad bits can be repaired
///
template <mss::mc_type MC>
fapi2::ReturnCode set_bad_dq_bitmap(const fapi2::Target<fapi2::TARGET_TYPE_DIMM>& i_target,
                                    uint8_t (&i_array)[BAD_BITS_RANKS][BAD_DQ_BYTE_COUNT]);

///
/// @brief Records bad bits into the bad bits attribute
/// @tparam MC MC type on which training was run
/// @tparam T fapi2::TargetType on which training was conducted
/// @tparam I Interface class used to abstract converting bad bits into the attribute
/// @param[in] i_target the fapi2 target oon which training was conducted
/// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if bad bits can be repaired
///
template <mss::mc_type MC, fapi2::TargetType T, class I >
inline fapi2::ReturnCode record_bad_bits( const fapi2::Target<T>& i_target, const I& i_helper )
{
    // If we have a FIR set that could have caused our training fail, then skip checking bad bits in FW
    // PRD will handle the FIR and retrigger the procedure
#ifdef __HOSTBOOT_MODULE
    bool l_fir_error = false;

    // Note: using success here will cause an RC to not be logged
    // We can still see if we do have a FIR error though
    fapi2::ReturnCode l_rc(fapi2::FAPI2_RC_SUCCESS);
    FAPI_TRY((mss::check::bad_fir_bits<MC, T>(i_target, l_rc, l_fir_error)), "%s took an error while checking FIR's",
             mss::c_str(i_target));

    // Exit if we took a FIR error - PRD will handle bad bits
    if(l_fir_error)
    {
        FAPI_INF("%s has FIR's set, exiting to let PRD handle it", mss::c_str(i_target));
        return fapi2::FAPI2_RC_SUCCESS;
    }

#endif

    for( const auto& d : mss::find_targets<fapi2::TARGET_TYPE_DIMM>(i_target) )
    {
        uint8_t l_data[BAD_BITS_RANKS][BAD_DQ_BYTE_COUNT] = {};

        FAPI_TRY( i_helper.record_bad_bits_interface(d, l_data) );

        // Write
        FAPI_TRY(set_bad_dq_bitmap<MC>(d, l_data));
    }

fapi_try_exit:
    return fapi2::current_err;
}

} // ns mss
#endif