Increment red_waterfall for low vdn fix

Change-Id: Iaa5dbf94fe223cdfef7ebbfe8598f98f5472c956
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/46420
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Dev-Ready: JACOB L. HARVEY <jlharvey@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Reviewed-by: STEPHEN GLANCY <sglancy@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/46455
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: JACOB L. HARVEY <jlharvey@us.ibm.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H b/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H
index 8fdb47f5c..2c9d3872d 100644
--- a/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H
+++ b/src/import/chips/p9/procedures/hwp/memory/lib/workarounds/dp16_workarounds.H
@@ -197,6 +197,51 @@ fapi2::ReturnCode fix_blue_waterfall_gate( const fapi2::Target<fapi2::TARGET_TYP
         const bool i_always_run = false );
 
 ///
+/// @brief Fixes red waterfall values in a port
+/// @param[in] i_target - the target to operate on
+/// @param[in] i_rp, the rank pair that's being trained
+/// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if ok
+///
+fapi2::ReturnCode fix_red_waterfall_gate( const fapi2::Target<fapi2::TARGET_TYPE_MCA>& i_target, const uint64_t i_rp);
+
+
+///
+/// @brief Moves the red waterfall forward by one
+/// @param[in,out] io_red_waterfall - the red waterfall value
+///
+inline void update_red_waterfall(uint64_t& io_red_waterfall)
+{
+    constexpr uint64_t MAX_RED_WATERFALL_VALUE = 4;
+
+    if (++io_red_waterfall >= MAX_RED_WATERFALL_VALUE)
+    {
+        io_red_waterfall = 0;
+    }
+}
+
+///
+/// @brief Gets the red waterfall and gate delay values for a given DP quad
+/// @tparam uint64_t QUAD - which quad to access
+/// @param[in,out] io_waterfall_reg   - waterfall register data
+///
+template< uint64_t QUAD>
+void update_red_waterfall_for_quad(fapi2::buffer<uint64_t>& io_waterfall_reg)
+{
+    constexpr uint64_t NUM_QUAD = 4;
+    // Valid quad values are from 0-3, exit if the requested value is greater
+    static_assert(QUAD < NUM_QUAD, "Inserted quad value is greater than or equal to 4");
+
+    // Gets the data for this Quad
+    auto l_red_waterfall = mss::dp16::get_red_waterfall<QUAD>(io_waterfall_reg);
+
+    // Updates the waterfall and gate delay
+    update_red_waterfall(l_red_waterfall);
+
+    // Sets the data back into the register
+    mss::dp16::set_red_waterfall<QUAD>(io_waterfall_reg, l_red_waterfall);
+}
+
+///
 /// @brief Modifies HW calibration results based upon workarounds
 /// @param[in]  i_target - the target to operate on
 /// @return fapi2::ReturnCode FAPI2_RC_SUCCESS if ok