From 877f5d6aeb6a1a62f09c95cc214c874d057310d6 Mon Sep 17 00:00:00 2001 From: Leah Rowe Date: Sat, 10 Aug 2024 14:43:19 +0100 Subject: coreboot/default: merge coreboot/haswell Signed-off-by: Leah Rowe --- .../0053-haswell-NRI-Add-RcvEn-training.patch | 708 +++++++++++++++++++++ 1 file changed, 708 insertions(+) create mode 100644 config/coreboot/default/patches/0053-haswell-NRI-Add-RcvEn-training.patch (limited to 'config/coreboot/default/patches/0053-haswell-NRI-Add-RcvEn-training.patch') diff --git a/config/coreboot/default/patches/0053-haswell-NRI-Add-RcvEn-training.patch b/config/coreboot/default/patches/0053-haswell-NRI-Add-RcvEn-training.patch new file mode 100644 index 00000000..a9821796 --- /dev/null +++ b/config/coreboot/default/patches/0053-haswell-NRI-Add-RcvEn-training.patch @@ -0,0 +1,708 @@ +From 0826d1e9ba50daad13c3d5adccba4b180c82296b Mon Sep 17 00:00:00 2001 +From: Angel Pons +Date: Sun, 8 May 2022 00:05:41 +0200 +Subject: [PATCH 11/17] haswell NRI: Add RcvEn training + +Implement the RcvEn (Receive Enable) calibration procedure. + +Change-Id: Ifbfa520f3e0486c56d0988ce67af2ddb9cf29888 +Signed-off-by: Angel Pons +--- + .../intel/haswell/native_raminit/Makefile.mk | 1 + + .../haswell/native_raminit/raminit_main.c | 1 + + .../haswell/native_raminit/raminit_native.h | 14 + + .../haswell/native_raminit/reg_structs.h | 13 + + .../native_raminit/train_receive_enable.c | 561 ++++++++++++++++++ + .../intel/haswell/registers/mchbar.h | 3 + + 6 files changed, 593 insertions(+) + create mode 100644 src/northbridge/intel/haswell/native_raminit/train_receive_enable.c + +diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk +index ebe9e9b762..e2fbfb4211 100644 +--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk ++++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk +@@ -16,3 +16,4 @@ romstage-y += setup_wdb.c + romstage-y += spd_bitmunching.c + romstage-y += testing_io.c + romstage-y += timings_refresh.c ++romstage-y += train_receive_enable.c +diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_main.c b/src/northbridge/intel/haswell/native_raminit/raminit_main.c +index 5e4674957d..7d444659c3 100644 +--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c ++++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c +@@ -60,6 +60,7 @@ static const struct task_entry cold_boot[] = { + { configure_memory_map, true, "MEMMAP", }, + { do_jedec_init, true, "JEDECINIT", }, + { pre_training, true, "PRETRAIN", }, ++ { train_receive_enable, true, "RCVET", }, + }; + + /* Return a generic stepping value to make stepping checks simpler */ +diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.h b/src/northbridge/intel/haswell/native_raminit/raminit_native.h +index 8707257b27..eaaaedad1e 100644 +--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h ++++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h +@@ -43,6 +43,9 @@ + #define NUM_WDB_CL_MUX_SEEDS 3 + #define NUM_CADB_MUX_SEEDS 3 + ++/* Specified in PI ticks. 64 PI ticks == 1 qclk */ ++#define tDQSCK_DRIFT 64 ++ + /* ZQ calibration types */ + enum { + ZQ_INIT, /* DDR3: ZQCL with tZQinit, LPDDR3: ZQ Init with tZQinit */ +@@ -189,6 +192,7 @@ enum raminit_status { + RAMINIT_STATUS_MPLL_INIT_FAILURE, + RAMINIT_STATUS_POLL_TIMEOUT, + RAMINIT_STATUS_REUT_ERROR, ++ RAMINIT_STATUS_RCVEN_FAILURE, + RAMINIT_STATUS_UNSPECIFIED_ERROR, /** TODO: Deprecated in favor of specific values **/ + }; + +@@ -271,6 +275,10 @@ struct sysinfo { + + union ddr_data_vref_adjust_reg dimm_vref; + ++ uint8_t io_latency[NUM_CHANNELS][NUM_SLOTRANKS]; ++ uint8_t rt_latency[NUM_CHANNELS][NUM_SLOTRANKS]; ++ uint32_t rt_io_comp[NUM_CHANNELS]; ++ + uint32_t data_offset_train[NUM_CHANNELS][NUM_LANES]; + uint32_t data_offset_comp[NUM_CHANNELS][NUM_LANES]; + +@@ -345,6 +353,11 @@ static inline void clear_data_offset_train_all(struct sysinfo *ctrl) + memset(ctrl->data_offset_train, 0, sizeof(ctrl->data_offset_train)); + } + ++static inline uint32_t get_data_train_feedback(const uint8_t channel, const uint8_t byte) ++{ ++ return mchbar_read32(DDR_DATA_TRAIN_FEEDBACK(channel, byte)); ++} ++ + /* Number of ticks to wait in units of 69.841279 ns (citation needed) */ + static inline void tick_delay(const uint32_t delay) + { +@@ -400,6 +413,7 @@ enum raminit_status convert_timings(struct sysinfo *ctrl); + enum raminit_status configure_mc(struct sysinfo *ctrl); + enum raminit_status configure_memory_map(struct sysinfo *ctrl); + enum raminit_status do_jedec_init(struct sysinfo *ctrl); ++enum raminit_status train_receive_enable(struct sysinfo *ctrl); + + void configure_timings(struct sysinfo *ctrl); + void configure_refresh(struct sysinfo *ctrl); +diff --git a/src/northbridge/intel/haswell/native_raminit/reg_structs.h b/src/northbridge/intel/haswell/native_raminit/reg_structs.h +index b943259b91..b099f4bb82 100644 +--- a/src/northbridge/intel/haswell/native_raminit/reg_structs.h ++++ b/src/northbridge/intel/haswell/native_raminit/reg_structs.h +@@ -297,6 +297,19 @@ union ddr_scram_misc_control_reg { + uint32_t raw; + }; + ++union sc_io_latency_reg { ++ struct __packed { ++ uint32_t iolat_rank0 : 4; // Bits 3:0 ++ uint32_t iolat_rank1 : 4; // Bits 7:4 ++ uint32_t iolat_rank2 : 4; // Bits 11:8 ++ uint32_t iolat_rank3 : 4; // Bits 15:12 ++ uint32_t rt_iocomp : 6; // Bits 21:16 ++ uint32_t : 9; // Bits 30:22 ++ uint32_t dis_rt_clk_gate : 1; // Bits 31:31 ++ }; ++ uint32_t raw; ++}; ++ + union mcscheds_cbit_reg { + struct __packed { + uint32_t dis_opp_cas : 1; // Bits 0:0 +diff --git a/src/northbridge/intel/haswell/native_raminit/train_receive_enable.c b/src/northbridge/intel/haswell/native_raminit/train_receive_enable.c +new file mode 100644 +index 0000000000..576c6bc21e +--- /dev/null ++++ b/src/northbridge/intel/haswell/native_raminit/train_receive_enable.c +@@ -0,0 +1,561 @@ ++/* SPDX-License-Identifier: GPL-2.0-or-later */ ++ ++#include ++#include ++#include ++ ++#include "raminit_native.h" ++#include "ranges.h" ++ ++#define RCVEN_PLOT RAM_DEBUG ++ ++static enum raminit_status change_rcven_timing(struct sysinfo *ctrl, const uint8_t channel) ++{ ++ int16_t max_rcven = -4096; ++ int16_t min_rcven = 4096; ++ int16_t max_rcven_rank[NUM_SLOTRANKS]; ++ int16_t min_rcven_rank[NUM_SLOTRANKS]; ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ max_rcven_rank[rank] = max_rcven; ++ min_rcven_rank[rank] = min_rcven; ++ } ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ int16_t new_rcven = ctrl->rcven[channel][rank][byte]; ++ new_rcven -= ctrl->io_latency[channel][rank] * 64; ++ if (max_rcven_rank[rank] < new_rcven) ++ max_rcven_rank[rank] = new_rcven; ++ ++ if (min_rcven_rank[rank] > new_rcven) ++ min_rcven_rank[rank] = new_rcven; ++ } ++ if (max_rcven < max_rcven_rank[rank]) ++ max_rcven = max_rcven_rank[rank]; ++ ++ if (min_rcven > min_rcven_rank[rank]) ++ min_rcven = min_rcven_rank[rank]; ++ } ++ ++ /* ++ * Determine how far we are from the ideal center point for RcvEn timing. ++ * (PiIdeal - AveRcvEn) / 64 is the ideal number of cycles we should have ++ * for IO latency. command training will reduce this by 64, so plan for ++ * that now in the ideal value. Round to closest integer. ++ */ ++ const int16_t rre_pi_ideal = 256 + 64; ++ const int16_t pi_reserve = 64; ++ const int16_t rcven_center = (max_rcven + min_rcven) / 2; ++ const int8_t iolat_target = DIV_ROUND_CLOSEST(rre_pi_ideal - rcven_center, 64); ++ ++ int8_t io_g_offset = 0; ++ int8_t io_lat[NUM_SLOTRANKS] = { 0 }; ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ io_lat[rank] = iolat_target; ++ ++ /* Check for RcvEn underflow/overflow */ ++ const int16_t rcven_lower = 64 * io_lat[rank] + min_rcven_rank[rank]; ++ if (rcven_lower < pi_reserve) ++ io_lat[rank] += DIV_ROUND_UP(pi_reserve - rcven_lower, 64); ++ ++ const int16_t rcven_upper = 64 * io_lat[rank] + max_rcven_rank[rank]; ++ if (rcven_upper > 511 - pi_reserve) ++ io_lat[rank] -= DIV_ROUND_UP(rcven_upper - (511 - pi_reserve), 64); ++ ++ /* Check for IO latency over/underflow */ ++ if (io_lat[rank] - io_g_offset > 14) ++ io_g_offset = io_lat[rank] - 14; ++ ++ if (io_lat[rank] - io_g_offset < 1) ++ io_g_offset = io_lat[rank] - 1; ++ ++ const int8_t cycle_offset = io_lat[rank] - ctrl->io_latency[channel][rank]; ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ ctrl->rcven[channel][rank][byte] += 64 * cycle_offset; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ } ++ } ++ ++ /* Calculate new IO comp latency */ ++ union sc_io_latency_reg sc_io_lat = { ++ .raw = mchbar_read32(SC_IO_LATENCY_ch(channel)), ++ }; ++ ++ /* Check if we are underflowing or overflowing this field */ ++ if (io_g_offset < 0 && sc_io_lat.rt_iocomp < -io_g_offset) { ++ printk(BIOS_ERR, "%s: IO COMP underflow\n", __func__); ++ printk(BIOS_ERR, "io_g_offset: %d\n", io_g_offset); ++ printk(BIOS_ERR, "rt_iocomp: %u\n", sc_io_lat.rt_iocomp); ++ return RAMINIT_STATUS_RCVEN_FAILURE; ++ } ++ if (io_g_offset > 0 && io_g_offset > 0x3f - sc_io_lat.rt_iocomp) { ++ printk(BIOS_ERR, "%s: IO COMP overflow\n", __func__); ++ printk(BIOS_ERR, "io_g_offset: %d\n", io_g_offset); ++ printk(BIOS_ERR, "rt_iocomp: %u\n", sc_io_lat.rt_iocomp); ++ return RAMINIT_STATUS_RCVEN_FAILURE; ++ } ++ sc_io_lat.rt_iocomp += io_g_offset; ++ ctrl->rt_io_comp[channel] = sc_io_lat.rt_iocomp; ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ if (ctrl->rankmap[channel] & BIT(rank)) ++ ctrl->io_latency[channel][rank] = io_lat[rank] - io_g_offset; ++ ++ const uint8_t shift = rank * 4; ++ sc_io_lat.raw &= ~(0xf << shift); ++ sc_io_lat.raw |= ctrl->io_latency[channel][rank] << shift; ++ } ++ mchbar_write32(SC_IO_LATENCY_ch(channel), sc_io_lat.raw); ++ return RAMINIT_STATUS_SUCCESS; ++} ++ ++#define RL_START (256 + 24) ++#define RL_STOP (384 + 24) ++#define RL_STEP 8 ++ ++#define RE_NUM_SAMPLES 6 ++ ++static enum raminit_status verify_high_region(const int32_t center, const int32_t lwidth) ++{ ++ if (center > RL_STOP) { ++ /* Check if center of high was found where it should be */ ++ printk(BIOS_ERR, "RcvEn: Center of high (%d) higher than expected\n", center); ++ return RAMINIT_STATUS_RCVEN_FAILURE; ++ } ++ if (lwidth <= 32) { ++ /* Check if width is large enough */ ++ printk(BIOS_ERR, "RcvEn: Width of high region (%d) too small\n", lwidth); ++ return RAMINIT_STATUS_RCVEN_FAILURE; ++ } ++ if (lwidth >= 96) { ++ /* Since we're calibrating a phase, a too large region is a problem */ ++ printk(BIOS_ERR, "RcvEn: Width of high region (%d) too large\n", lwidth); ++ return RAMINIT_STATUS_RCVEN_FAILURE; ++ } ++ return RAMINIT_STATUS_SUCCESS; ++} ++ ++static void program_io_latency(struct sysinfo *ctrl, const uint8_t channel, const uint8_t rank) ++{ ++ const uint8_t shift = rank * 4; ++ const uint8_t iolat = ctrl->io_latency[channel][rank]; ++ mchbar_clrsetbits32(SC_IO_LATENCY_ch(channel), 0xf << shift, iolat << shift); ++} ++ ++static void program_rl_delays(struct sysinfo *ctrl, const uint8_t rank, const uint16_t rl_delay) ++{ ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) ++ update_rxt(ctrl, channel, rank, byte, RXT_RCVEN, rl_delay); ++ } ++} ++ ++static bool sample_dqs(const uint8_t channel, const uint8_t byte) ++{ ++ return (get_data_train_feedback(channel, byte) & 0x1ff) >= BIT(RE_NUM_SAMPLES - 1); ++} ++ ++enum raminit_status train_receive_enable(struct sysinfo *ctrl) ++{ ++ const struct reut_box reut_addr = { ++ .col = { ++ .start = 0, ++ .stop = 1023, ++ .inc_rate = 0, ++ .inc_val = 1, ++ }, ++ }; ++ const struct wdb_pat wdb_pattern = { ++ .start_ptr = 0, ++ .stop_ptr = 9, ++ .inc_rate = 32, ++ .dq_pattern = BASIC_VA, ++ }; ++ ++ const uint16_t bytemask = BIT(ctrl->lanes) - 1; ++ const uint8_t fine_step = 1; ++ ++ const uint8_t rt_delta = is_hsw_ult() ? 4 : 2; ++ const uint8_t rt_io_comp = 21 + rt_delta; ++ const uint8_t rt_latency = 16 + rt_delta; ++ setup_io_test( ++ ctrl, ++ ctrl->chanmap, ++ PAT_RD, ++ 2, ++ RE_NUM_SAMPLES + 1, ++ &reut_addr, ++ 0, ++ &wdb_pattern, ++ 0, ++ 8); ++ ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!does_ch_exist(ctrl, channel)) ++ continue; ++ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ union ddr_data_control_2_reg data_control_2 = { ++ .raw = ctrl->dq_control_2[channel][byte], ++ }; ++ data_control_2.force_rx_on = 1; ++ mchbar_write32(DQ_CONTROL_2(channel, byte), data_control_2.raw); ++ } ++ union ddr_data_control_0_reg data_control_0 = { ++ .raw = ctrl->dq_control_0[channel], ++ }; ++ if (ctrl->lpddr) { ++ /** ++ * W/A for b4618574 - @todo: remove for HSW ULT C0 ++ * Can't have force_odt_on together with leaker, disable LPDDR ++ * mode during this training step. lpddr_mode is restored ++ * at the end of this function from the host structure. ++ */ ++ data_control_0.lpddr_mode = 0; ++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw); ++ } ++ data_control_0.force_odt_on = 1; ++ data_control_0.rl_training_mode = 1; ++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw); ++ mchbar_write32(SC_IO_LATENCY_ch(channel), (union sc_io_latency_reg) { ++ .rt_iocomp = rt_io_comp, ++ }.raw); ++ } ++ enum raminit_status status = RAMINIT_STATUS_SUCCESS; ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ if (!does_rank_exist(ctrl, rank)) ++ continue; ++ ++ /* ++ * Set initial roundtrip latency values. Assume -4 QCLK for worst board ++ * layout. This is calculated as HW_ROUNDT_LAT_DEFAULT_VALUE plus: ++ * ++ * DDR3: Default + (2 * tAA) + 4 QCLK + PI_CLK + N-mode value * 2 ++ * LPDDR3: Default + (2 * tAA) + 4 QCLK + PI_CLK + tDQSCK_max ++ * ++ * N-mode is 3 during training mode. Both channels use the same timings. ++ */ ++ /** TODO: differs for LPDDR **/ ++ const uint32_t tmp = MAX(ctrl->multiplier, 4) + 5 + 2 * ctrl->tAA; ++ const uint32_t initial_rt_latency = MIN(rt_latency + tmp, 0x3f); ++ ++ uint8_t chanmask = 0; ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ chanmask |= select_reut_ranks(ctrl, channel, BIT(rank)); ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ ctrl->io_latency[channel][rank] = 0; ++ mchbar_write8(SC_ROUNDT_LAT_ch(channel) + rank, initial_rt_latency); ++ ctrl->rt_latency[channel][rank] = initial_rt_latency; ++ } ++ ++ printk(BIOS_DEBUG, "Rank %u\n", rank); ++ printk(BIOS_DEBUG, "Steps 1 and 2: Find middle of high region\n"); ++ printk(RCVEN_PLOT, "Byte"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(RCVEN_PLOT, "\t"); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) ++ printk(RCVEN_PLOT, "%u ", byte); ++ } ++ printk(RCVEN_PLOT, "\nRcvEn\n"); ++ struct phase_train_data region_data[NUM_CHANNELS][NUM_LANES] = { 0 }; ++ for (uint16_t rl_delay = RL_START; rl_delay < RL_STOP; rl_delay += RL_STEP) { ++ printk(RCVEN_PLOT, " % 3d", rl_delay); ++ program_rl_delays(ctrl, rank, rl_delay); ++ run_io_test(ctrl, chanmask, BASIC_VA, true); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(RCVEN_PLOT, "\t"); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ const bool high = sample_dqs(channel, byte); ++ printk(RCVEN_PLOT, high ? ". " : "# "); ++ phase_record_pass( ++ ®ion_data[channel][byte], ++ high, ++ rl_delay, ++ RL_START, ++ RL_STEP); ++ } ++ } ++ printk(RCVEN_PLOT, "\n"); ++ } ++ printk(RCVEN_PLOT, "\n"); ++ printk(BIOS_DEBUG, "Update RcvEn timing to be in the center of high region\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(BIOS_DEBUG, "C%u.R%u: \tLeft\tRight\tWidth\tCenter\n", ++ channel, rank); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ struct phase_train_data *const curr_data = ++ ®ion_data[channel][byte]; ++ phase_append_current_to_initial(curr_data, RL_START, RL_STEP); ++ const int32_t lwidth = range_width(curr_data->largest); ++ const int32_t center = range_center(curr_data->largest); ++ printk(BIOS_DEBUG, " B%u: \t%d\t%d\t%d\t%d\n", ++ byte, ++ curr_data->largest.start, ++ curr_data->largest.end, ++ lwidth, ++ center); ++ ++ status = verify_high_region(center, lwidth); ++ if (status) { ++ printk(BIOS_ERR, ++ "RcvEn problems on channel %u, byte %u\n", ++ channel, byte); ++ goto clean_up; ++ } ++ ctrl->rcven[channel][rank][byte] = center; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ } ++ printk(BIOS_DEBUG, "\n"); ++ } ++ ++ printk(BIOS_DEBUG, "Step 3: Quarter preamble - Walk backwards\n"); ++ printk(RCVEN_PLOT, "Byte"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(RCVEN_PLOT, "\t"); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) ++ printk(RCVEN_PLOT, "%u ", byte); ++ } ++ printk(RCVEN_PLOT, "\nIOLAT\n"); ++ bool done = false; ++ while (!done) { ++ run_io_test(ctrl, chanmask, BASIC_VA, true); ++ done = true; ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(RCVEN_PLOT, " %2u\t", ctrl->io_latency[channel][rank]); ++ uint16_t highs = 0; ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ const bool high = sample_dqs(channel, byte); ++ printk(RCVEN_PLOT, high ? "H " : "L "); ++ if (high) ++ highs |= BIT(byte); ++ } ++ if (!highs) ++ continue; ++ ++ done = false; ++ ++ /* If all bytes sample high, adjust timing globally */ ++ if (highs == bytemask && ctrl->io_latency[channel][rank] < 14) { ++ ctrl->io_latency[channel][rank] += 2; ++ ctrl->io_latency[channel][rank] %= 16; ++ program_io_latency(ctrl, channel, rank); ++ continue; ++ } ++ ++ /* Otherwise, adjust individual bytes */ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ if (!(highs & BIT(byte))) ++ continue; ++ ++ if (ctrl->rcven[channel][rank][byte] < 128) { ++ printk(BIOS_ERR, ++ "RcvEn underflow: walking backwards\n"); ++ printk(BIOS_ERR, ++ "For channel %u, rank %u, byte %u\n", ++ channel, rank, byte); ++ status = RAMINIT_STATUS_RCVEN_FAILURE; ++ goto clean_up; ++ } ++ ctrl->rcven[channel][rank][byte] -= 128; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ } ++ } ++ printk(RCVEN_PLOT, "\n"); ++ } ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(BIOS_DEBUG, "\nC%u: Preamble\n", channel); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ printk(BIOS_DEBUG, ++ " B%u: %u\n", byte, ctrl->rcven[channel][rank][byte]); ++ } ++ } ++ printk(BIOS_DEBUG, "\n"); ++ ++ printk(BIOS_DEBUG, "Step 4: Add 1 qclk\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ ctrl->rcven[channel][rank][byte] += 64; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ } ++ } ++ printk(BIOS_DEBUG, "\n"); ++ ++ printk(BIOS_DEBUG, "Step 5: Walk forward to find rising edge\n"); ++ printk(RCVEN_PLOT, "Byte"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(RCVEN_PLOT, "\t"); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) ++ printk(RCVEN_PLOT, "%u ", byte); ++ } ++ printk(RCVEN_PLOT, "\n inc\n"); ++ uint16_t ch_result[NUM_CHANNELS] = { 0 }; ++ uint8_t inc_preamble[NUM_CHANNELS][NUM_LANES] = { 0 }; ++ for (uint8_t inc = 0; inc < 64; inc += fine_step) { ++ printk(RCVEN_PLOT, " %2u\t", inc); ++ run_io_test(ctrl, chanmask, BASIC_VA, true); ++ done = true; ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ if (ch_result[channel] & BIT(byte)) { ++ /* Skip bytes that are already done */ ++ printk(RCVEN_PLOT, ". "); ++ continue; ++ } ++ const bool pass = sample_dqs(channel, byte); ++ printk(RCVEN_PLOT, pass ? ". " : "# "); ++ if (pass) { ++ ch_result[channel] |= BIT(byte); ++ continue; ++ } ++ ctrl->rcven[channel][rank][byte] += fine_step; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ inc_preamble[channel][byte] = inc; ++ } ++ printk(RCVEN_PLOT, "\t"); ++ if (ch_result[channel] != bytemask) ++ done = false; ++ } ++ printk(RCVEN_PLOT, "\n"); ++ if (done) ++ break; ++ } ++ printk(BIOS_DEBUG, "\n"); ++ if (!done) { ++ printk(BIOS_ERR, "Error: Preamble edge not found for all bytes\n"); ++ printk(BIOS_ERR, "The final RcvEn results are as follows:\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(BIOS_ERR, "Channel %u Rank %u: preamble\n", ++ channel, rank); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ printk(BIOS_ERR, " Byte %u: %u%s\n", byte, ++ ctrl->rcven[channel][rank][byte], ++ (ch_result[channel] ^ bytemask) & BIT(byte) ++ ? "" ++ : " *** Check this byte! ***"); ++ } ++ } ++ status = RAMINIT_STATUS_RCVEN_FAILURE; ++ goto clean_up; ++ } ++ ++ printk(BIOS_DEBUG, "Step 6: center on preamble and clean up rank\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ printk(BIOS_DEBUG, "C%u: Preamble increment\n", channel); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ /* ++ * For Traditional, pull in RcvEn by 64. For ULT, take the DQS ++ * drift into account to the specified guardband: tDQSCK_DRIFT. ++ */ ++ ctrl->rcven[channel][rank][byte] -= tDQSCK_DRIFT; ++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0); ++ printk(BIOS_DEBUG, " B%u: %u %u\n", byte, ++ ctrl->rcven[channel][rank][byte], ++ inc_preamble[channel][byte]); ++ } ++ printk(BIOS_DEBUG, "\n"); ++ } ++ printk(BIOS_DEBUG, "\n"); ++ } ++ ++clean_up: ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!does_ch_exist(ctrl, channel)) ++ continue; ++ ++ if (ctrl->lpddr) { ++ /** ++ * W/A for b4618574 - @todo: remove for HSW ULT C0 ++ * Can't have force_odt_on together with leaker, disable LPDDR mode for ++ * this training step. This write will disable force_odt_on while still ++ * keeping LPDDR mode disabled. Second write will restore LPDDR mode. ++ */ ++ union ddr_data_control_0_reg data_control_0 = { ++ .raw = ctrl->dq_control_0[channel], ++ }; ++ data_control_0.lpddr_mode = 0; ++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw); ++ } ++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), ctrl->dq_control_0[channel]); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ mchbar_write32(DQ_CONTROL_2(channel, byte), ++ ctrl->dq_control_2[channel][byte]); ++ } ++ } ++ io_reset(); ++ if (status) ++ return status; ++ ++ printk(BIOS_DEBUG, "Step 7: Sync IO latency across all ranks\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!does_ch_exist(ctrl, channel)) ++ continue; ++ ++ status = change_rcven_timing(ctrl, channel); ++ if (status) ++ return status; ++ } ++ printk(BIOS_DEBUG, "\nFinal Receive Enable and IO latency settings:\n"); ++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) { ++ if (!does_ch_exist(ctrl, channel)) ++ continue; ++ ++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) { ++ if (!rank_in_ch(ctrl, rank, channel)) ++ continue; ++ ++ const union sc_io_latency_reg sc_io_latency = { ++ .raw = mchbar_read32(SC_IO_LATENCY_ch(channel)), ++ }; ++ printk(BIOS_DEBUG, " C%u.R%u: IOLAT = %u rt_iocomp = %u\n", channel, ++ rank, ctrl->io_latency[channel][rank], sc_io_latency.rt_iocomp); ++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) { ++ printk(BIOS_DEBUG, " B%u: %u\n", byte, ++ ctrl->rcven[channel][rank][byte]); ++ } ++ printk(BIOS_DEBUG, "\n"); ++ } ++ } ++ return status; ++} +diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h +index a81559bb1e..9172d4f2b0 100644 +--- a/src/northbridge/intel/haswell/registers/mchbar.h ++++ b/src/northbridge/intel/haswell/registers/mchbar.h +@@ -18,6 +18,8 @@ + #define RX_TRAIN_ch_r_b(ch, rank, byte) _DDRIO_C_R_B(0x0000, ch, rank, byte) + #define TX_TRAIN_ch_r_b(ch, rank, byte) _DDRIO_C_R_B(0x0020, ch, rank, byte) + ++#define DDR_DATA_TRAIN_FEEDBACK(ch, byte) _DDRIO_C_R_B(0x0054, ch, 0, byte) ++ + #define DQ_CONTROL_2(ch, byte) _DDRIO_C_R_B(0x0064, ch, 0, byte) + #define DQ_CONTROL_0(ch, byte) _DDRIO_C_R_B(0x0074, ch, 0, byte) + +@@ -100,6 +102,7 @@ + #define COMMAND_RATE_LIMIT_ch(ch) _MCMAIN_C(0x4010, ch) + #define TC_BANK_RANK_D_ch(ch) _MCMAIN_C(0x4014, ch) + #define SC_ROUNDT_LAT_ch(ch) _MCMAIN_C(0x4024, ch) ++#define SC_IO_LATENCY_ch(ch) _MCMAIN_C(0x4028, ch) + + #define REUT_ch_PAT_WDB_CL_MUX_CFG(ch) _MCMAIN_C(0x4040, ch) + +-- +2.39.2 + -- cgit v1.2.1