/* IBM_PROLOG_BEGIN_TAG                                                   */
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/* $Source: src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_draminit.C $ */
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/* OpenPOWER HostBoot Project                                             */
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/* [+] International Business Machines Corp.                              */
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/* IBM_PROLOG_END_TAG                                                     */

///
/// @file exp_draminit.C
/// @brief Procedure definition to initialize DRAM
///
// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
// *HWP HWP Backup: Stephen Glancy <sglancy@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 2
// *HWP Consumed by: FSP:HB

#include <lib/shared/exp_consts.H>
#include <exp_inband.H>
#include <generic/memory/lib/utils/c_str.H>
#include <generic/memory/lib/utils/mss_bad_bits.H>
#include <lib/exp_draminit_utils.H>
#include <lib/phy/exp_train_display.H>
#include <lib/phy/exp_train_handler.H>
#include <lib/shared/exp_consts.H>
#include <generic/memory/mss_git_data_helper.H>

extern "C"
{
    ///
    /// @brief Initializes DRAM
    /// @param[in] i_target the controller
    /// @return FAPI2_RC_SUCCESS if ok
    ///
    fapi2::ReturnCode exp_draminit(const fapi2::Target<fapi2::TARGET_TYPE_OCMB_CHIP>& i_target)
    {
        mss::display_git_commit_info("exp_draminit");

        uint32_t l_crc = 0;

        user_input_msdg l_phy_params;
        FAPI_TRY(mss::exp::setup_phy_params(i_target, l_phy_params),
                 "Failed setup_phy_params() for %s", mss::c_str(i_target));

        // Copy the PHY initialization parameters into the internal buffer of Explorer
        FAPI_TRY( mss::exp::ib::putUserInputMsdg(i_target, l_phy_params, l_crc),
                  "Failed putUserInputMsdg() for %s", mss::c_str(i_target) );

        // Issue full boot mode cmd though EXP-FW REQ buffer
        {
            host_fw_command_struct l_cmd;
            mss::exp::setup_cmd_params(l_crc, l_cmd);
            FAPI_TRY( mss::exp::ib::putCMD(i_target, l_cmd),
                      "Failed putCMD() for  %s", mss::c_str(i_target) );
        }

        // Read the response message from EXP-FW RESP buffer
        {
            host_fw_response_struct l_response;
            user_response_msdg l_train_response;

            std::vector<uint8_t> l_rsp_data;
            fapi2::ReturnCode l_rc(fapi2::FAPI2_RC_SUCCESS);

            FAPI_TRY( mss::exp::ib::getRSP(i_target, l_response, l_rsp_data),
                      "Failed getRSP() for  %s", mss::c_str(i_target) );

            // Proccesses the response data
            FAPI_TRY( mss::exp::read_training_response(i_target, l_rsp_data, l_train_response),
                      "Failed read_training_response for %s", mss::c_str(i_target));

            // Displays the training response
            FAPI_TRY( mss::exp::train::display_info(i_target, l_train_response));

            // Check if cmd was successful
            l_rc = mss::exp::check::response(i_target, l_response);

            // If not, then we need to process the bad bitmap
            if(l_rc != fapi2::FAPI2_RC_SUCCESS)
            {
                mss::exp::bad_bit_interface l_interface(l_train_response);

                // Record bad bits should only fail if we have an attributes issue - that's a major issue
                FAPI_TRY(mss::record_bad_bits<mss::mc_type::EXPLORER>(i_target, l_interface));

                // Now, go to our true error handling procedure
                FAPI_TRY(l_rc, "mss::exp::check::response failed for %s", mss::c_str(i_target));
            }
        }

    fapi_try_exit:
        FAPI_INF("Draminit training - %s %s",
                 (fapi2::current_err == fapi2::FAPI2_RC_SUCCESS ? "success" : "errors reported - trying to blame FIR's"),
                 mss::c_str(i_target));

        // Due to the RAS/PRD requirements, we need to check for FIR's
        // If any FIR's have lit up, this draminit fail could have been caused by the FIR, rather than bad hardware
        // So, let PRD retrigger this step to see if we can resolve the issue
        return mss::check::fir_or_pll_fail<mss::mc_type::EXPLORER>(i_target, fapi2::current_err);
    }
}