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lbmk/config/coreboot/haswell/patches/0007-haswell-NRI-Add-pre-tr...

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From 936d432822fcd9aa2f018444cdc89e48e6d257d5 Mon Sep 17 00:00:00 2001
From: Angel Pons <th3fanbus@gmail.com>
Date: Sat, 7 May 2022 23:12:18 +0200
Subject: [PATCH 07/20] haswell NRI: Add pre-training steps
Implement pre-training steps, which consist of enabling ECC I/O and
filling the WDB (Write Data Buffer, stores test patterns) through a
magic LDAT port.
Change-Id: Ie2e09e3b218c4569ed8de5c5e1b05d491032e0f1
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
---
.../intel/haswell/native_raminit/Makefile.mk | 1 +
.../haswell/native_raminit/raminit_main.c | 35 ++++
.../haswell/native_raminit/raminit_native.h | 24 +++
.../haswell/native_raminit/reg_structs.h | 45 +++++
.../intel/haswell/native_raminit/setup_wdb.c | 159 ++++++++++++++++++
.../intel/haswell/registers/mchbar.h | 9 +
6 files changed, 273 insertions(+)
create mode 100644 src/northbridge/intel/haswell/native_raminit/setup_wdb.c
diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
index e9212df9e6..8d7d4e4db0 100644
--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
@@ -10,5 +10,6 @@ romstage-y += memory_map.c
romstage-y += raminit_main.c
romstage-y += raminit_native.c
romstage-y += reut.c
+romstage-y += setup_wdb.c
romstage-y += spd_bitmunching.c
romstage-y += timings_refresh.c
diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_main.c b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
index 94b268468c..5e4674957d 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
@@ -3,6 +3,7 @@
#include <assert.h>
#include <console/console.h>
#include <cpu/intel/haswell/haswell.h>
+#include <delay.h>
#include <device/pci_ops.h>
#include <northbridge/intel/haswell/chip.h>
#include <northbridge/intel/haswell/haswell.h>
@@ -12,6 +13,39 @@
#include "raminit_native.h"
+static enum raminit_status pre_training(struct sysinfo *ctrl)
+{
+ /* Skip on S3 resume */
+ if (ctrl->bootmode == BOOTMODE_S3)
+ return RAMINIT_STATUS_SUCCESS;
+
+ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+ for (uint8_t slot = 0; slot < NUM_SLOTS; slot++) {
+ if (!rank_in_ch(ctrl, slot + slot, channel))
+ continue;
+
+ printk(RAM_DEBUG, "C%uS%u:\n", channel, slot);
+ printk(RAM_DEBUG, "\tMR0: 0x%04x\n", ctrl->mr0[channel][slot]);
+ printk(RAM_DEBUG, "\tMR1: 0x%04x\n", ctrl->mr1[channel][slot]);
+ printk(RAM_DEBUG, "\tMR2: 0x%04x\n", ctrl->mr2[channel][slot]);
+ printk(RAM_DEBUG, "\tMR3: 0x%04x\n", ctrl->mr3[channel][slot]);
+ printk(RAM_DEBUG, "\n");
+ }
+ if (ctrl->is_ecc) {
+ union mad_dimm_reg mad_dimm = {
+ .raw = mchbar_read32(MAD_DIMM(channel)),
+ };
+ /* Enable ECC I/O */
+ mad_dimm.ecc_mode = 1;
+ mchbar_write32(MAD_DIMM(channel), mad_dimm.raw);
+ /* Wait 4 usec after enabling the ECC I/O, needed by HW */
+ udelay(4);
+ }
+ }
+ setup_wdb(ctrl);
+ return RAMINIT_STATUS_SUCCESS;
+}
+
struct task_entry {
enum raminit_status (*task)(struct sysinfo *);
bool is_enabled;
@@ -25,6 +59,7 @@ static const struct task_entry cold_boot[] = {
{ configure_mc, true, "CONFMC", },
{ configure_memory_map, true, "MEMMAP", },
{ do_jedec_init, true, "JEDECINIT", },
+ { pre_training, true, "PRETRAIN", },
};
/* 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 4bc2a4955f..1971b44b66 100644
--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h
+++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
@@ -35,6 +35,13 @@
#define RTTNOM_MASK (BIT(9) | BIT(6) | BIT(2))
+#define BASIC_VA_PAT_SPREAD_8 0x01010101
+
+#define WDB_CACHE_LINE_SIZE 8
+
+#define NUM_WDB_CL_MUX_SEEDS 3
+#define NUM_CADB_MUX_SEEDS 3
+
/* ZQ calibration types */
enum {
ZQ_INIT, /* DDR3: ZQCL with tZQinit, LPDDR3: ZQ Init with tZQinit */
@@ -316,6 +323,23 @@ void reut_issue_mrs_all(
enum raminit_status reut_issue_zq(struct sysinfo *ctrl, uint8_t chanmask, uint8_t zq_type);
+void write_wdb_fixed_pat(
+ const struct sysinfo *ctrl,
+ const uint8_t patterns[],
+ const uint8_t pat_mask[],
+ uint8_t spread,
+ uint16_t start);
+
+void write_wdb_va_pat(
+ const struct sysinfo *ctrl,
+ uint32_t agg_mask,
+ uint32_t vic_mask,
+ uint8_t vic_rot,
+ uint16_t start);
+
+void program_wdb_lfsr(const struct sysinfo *ctrl, bool cleanup);
+void setup_wdb(const struct sysinfo *ctrl);
+
uint8_t get_rx_bias(const struct sysinfo *ctrl);
uint8_t get_tCWL(uint32_t mem_clock_mhz);
diff --git a/src/northbridge/intel/haswell/native_raminit/reg_structs.h b/src/northbridge/intel/haswell/native_raminit/reg_structs.h
index 9929f617fe..7aa8d8c8b2 100644
--- a/src/northbridge/intel/haswell/native_raminit/reg_structs.h
+++ b/src/northbridge/intel/haswell/native_raminit/reg_structs.h
@@ -335,6 +335,18 @@ union mcscheds_cbit_reg {
uint32_t raw;
};
+union reut_pat_cl_mux_lmn_reg {
+ struct __packed {
+ uint32_t l_data_select : 1; // Bits 0:0
+ uint32_t en_sweep_freq : 1; // Bits 1:1
+ uint32_t : 6; // Bits 7:2
+ uint32_t l_counter : 8; // Bits 15:8
+ uint32_t m_counter : 8; // Bits 23:16
+ uint32_t n_counter : 8; // Bits 31:24
+ };
+ uint32_t raw;
+};
+
union reut_pat_cadb_prog_reg {
struct __packed {
uint32_t addr : 16; // Bits 15:0
@@ -439,6 +451,39 @@ union reut_misc_odt_ctrl_reg {
uint32_t raw;
};
+union ldat_pdat_reg {
+ struct __packed {
+ uint32_t fast_addr : 12; // Bits 11:0
+ uint32_t : 4; // Bits 15:12
+ uint32_t addr_en : 1; // Bits 16:16
+ uint32_t seq_en : 1; // Bits 17:17
+ uint32_t pol_0 : 1; // Bits 18:18
+ uint32_t pol_1 : 1; // Bits 19:19
+ uint32_t cmd_a : 4; // Bits 23:20
+ uint32_t cmd_b : 4; // Bits 27:24
+ uint32_t cmd_c : 4; // Bits 31:28
+ };
+ uint32_t raw;
+};
+
+union ldat_sdat_reg {
+ struct __packed {
+ uint32_t bank_sel : 4; // Bits 3:0
+ uint32_t : 1; // Bits 4:4
+ uint32_t array_sel : 5; // Bits 9:5
+ uint32_t cmp : 1; // Bits 10:10
+ uint32_t replicate : 1; // Bits 11:11
+ uint32_t dword : 4; // Bits 15:12
+ uint32_t mode : 2; // Bits 17:16
+ uint32_t mpmap : 6; // Bits 23:18
+ uint32_t mpb_offset : 4; // Bits 27:24
+ uint32_t stage_en : 1; // Bits 28:28
+ uint32_t shadow : 2; // Bits 30:29
+ uint32_t : 1; // Bits 31:31
+ };
+ uint32_t raw;
+};
+
union mcscheds_dft_misc_reg {
struct __packed {
uint32_t wdar : 1; // Bits 0:0
diff --git a/src/northbridge/intel/haswell/native_raminit/setup_wdb.c b/src/northbridge/intel/haswell/native_raminit/setup_wdb.c
new file mode 100644
index 0000000000..ec37c48415
--- /dev/null
+++ b/src/northbridge/intel/haswell/native_raminit/setup_wdb.c
@@ -0,0 +1,159 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <northbridge/intel/haswell/haswell.h>
+#include <types.h>
+
+#include "raminit_native.h"
+
+static void ldat_write_cacheline(
+ const struct sysinfo *const ctrl,
+ const uint8_t chunk,
+ const uint16_t start,
+ const uint64_t data)
+{
+ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+ if (!does_ch_exist(ctrl, channel))
+ continue;
+
+ /*
+ * Do not do a 64-bit write here. The register is not aligned
+ * to a 64-bit boundary, which could potentially cause issues.
+ */
+ mchbar_write32(QCLK_ch_LDAT_DATA_IN_x(channel, 0), data & UINT32_MAX);
+ mchbar_write32(QCLK_ch_LDAT_DATA_IN_x(channel, 1), data >> 32);
+ /*
+ * Set REPLICATE = 0 as you don't want to replicate the data.
+ * Set BANK_SEL to the chunk you want to write the 64 bits to.
+ * Set ARRAY_SEL = 0 (the MC WDB) and MODE = 1.
+ */
+ const union ldat_sdat_reg ldat_sdat = {
+ .bank_sel = chunk,
+ .mode = 1,
+ };
+ mchbar_write32(QCLK_ch_LDAT_SDAT(channel), ldat_sdat.raw);
+ /*
+ * Finally, write the PDAT register indicating which cacheline
+ * of the WDB you want to write to by setting FAST_ADDR field
+ * to one of the 64 cache lines. Also set CMD_B in the PDAT
+ * register to 4'b1000, indicating that this is a LDAT write.
+ */
+ const union ldat_pdat_reg ldat_pdat = {
+ .fast_addr = MIN(start, 0xfff),
+ .cmd_b = 8,
+ };
+ mchbar_write32(QCLK_ch_LDAT_PDAT(channel), ldat_pdat.raw);
+ }
+}
+
+static void clear_ldat_mode(const struct sysinfo *const ctrl)
+{
+ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++)
+ mchbar_write32(QCLK_ch_LDAT_SDAT(channel), 0);
+}
+
+void write_wdb_fixed_pat(
+ const struct sysinfo *const ctrl,
+ const uint8_t patterns[],
+ const uint8_t pat_mask[],
+ const uint8_t spread,
+ const uint16_t start)
+{
+ for (uint8_t chunk = 0; chunk < WDB_CACHE_LINE_SIZE; chunk++) {
+ uint64_t data = 0;
+ for (uint8_t b = 0; b < 64; b++) {
+ const uint8_t beff = b % spread;
+ const uint8_t burst = patterns[pat_mask[beff]];
+ if (burst & BIT(chunk))
+ data |= 1ULL << b;
+ }
+ ldat_write_cacheline(ctrl, chunk, start, data);
+ }
+ clear_ldat_mode(ctrl);
+}
+
+static inline uint32_t rol_u32(const uint32_t val)
+{
+ return (val << 1) | ((val >> 31) & 1);
+}
+
+void write_wdb_va_pat(
+ const struct sysinfo *const ctrl,
+ const uint32_t agg_mask,
+ const uint32_t vic_mask,
+ const uint8_t vic_rot,
+ const uint16_t start)
+{
+ static const uint8_t va_mask_to_compressed[4] = {0xaa, 0xc0, 0xcc, 0xf0};
+ uint32_t v_mask = vic_mask;
+ uint32_t a_mask = agg_mask;
+ for (uint8_t v = 0; v < vic_rot; v++) {
+ uint8_t compressed[32] = {0};
+ /* Iterate through all 32 bits and create a compressed version of cacheline */
+ for (uint8_t b = 0; b < ARRAY_SIZE(compressed); b++) {
+ const uint8_t vic = !!(v_mask & BIT(b));
+ const uint8_t agg = !!(a_mask & BIT(b));
+ const uint8_t index = !vic << 1 | agg << 0;
+ compressed[b] = va_mask_to_compressed[index];
+ }
+ for (uint8_t chunk = 0; chunk < WDB_CACHE_LINE_SIZE; chunk++) {
+ uint32_t data = 0;
+ for (uint8_t b = 0; b < ARRAY_SIZE(compressed); b++)
+ data |= !!(compressed[b] & BIT(chunk)) << b;
+
+ const uint64_t data64 = (uint64_t)data << 32 | data;
+ ldat_write_cacheline(ctrl, chunk, start + v, data64);
+ }
+ v_mask = rol_u32(v_mask);
+ a_mask = rol_u32(a_mask);
+ }
+ clear_ldat_mode(ctrl);
+}
+
+void program_wdb_lfsr(const struct sysinfo *ctrl, const bool cleanup)
+{
+ /* Cleanup LFSR seeds are sequential */
+ const uint32_t cleanup_seeds[NUM_WDB_CL_MUX_SEEDS] = { 0xaaaaaa, 0xcccccc, 0xf0f0f0 };
+ const uint32_t regular_seeds[NUM_WDB_CL_MUX_SEEDS] = { 0xa10ca1, 0xef0d08, 0xad0a1e };
+ const uint32_t *seeds = cleanup ? cleanup_seeds : regular_seeds;
+
+ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+ if (!does_ch_exist(ctrl, channel))
+ continue;
+
+ for (uint8_t i = 0; i < NUM_WDB_CL_MUX_SEEDS; i++) {
+ mchbar_write32(REUT_ch_PAT_WDB_CL_MUX_RD_x(channel, i), seeds[i]);
+ mchbar_write32(REUT_ch_PAT_WDB_CL_MUX_WR_x(channel, i), seeds[i]);
+ }
+ }
+}
+
+void setup_wdb(const struct sysinfo *ctrl)
+{
+ const uint32_t amask[9] = {
+ 0x86186186, 0x18618618, 0x30c30c30,
+ 0xa28a28a2, 0x8a28a28a, 0x14514514,
+ 0x28a28a28, 0x92492492, 0x24924924,
+ };
+ const uint32_t vmask = 0x41041041;
+
+ /* Fill first 8 entries with simple 2-LFSR VA pattern */
+ write_wdb_va_pat(ctrl, 0, BASIC_VA_PAT_SPREAD_8, 8, 0);
+
+ /* Fill next 54 entries with 3-LFSR VA pattern */
+ for (uint8_t a = 0; a < ARRAY_SIZE(amask); a++)
+ write_wdb_va_pat(ctrl, amask[a], vmask, 6, 8 + a * 6);
+
+ program_wdb_lfsr(ctrl, false);
+ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
+ if (!does_ch_exist(ctrl, channel))
+ continue;
+
+ const union reut_pat_cl_mux_lmn_reg wdb_cl_mux_lmn = {
+ .en_sweep_freq = 1,
+ .l_counter = 1,
+ .m_counter = 1,
+ .n_counter = 10,
+ };
+ mchbar_write32(REUT_ch_PAT_WDB_CL_MUX_LMN(channel), wdb_cl_mux_lmn.raw);
+ }
+}
diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h
index 4fc78a7f43..f8408e51a0 100644
--- a/src/northbridge/intel/haswell/registers/mchbar.h
+++ b/src/northbridge/intel/haswell/registers/mchbar.h
@@ -94,6 +94,11 @@
#define TC_BANK_RANK_D_ch(ch) _MCMAIN_C(0x4014, ch)
#define SC_ROUNDT_LAT_ch(ch) _MCMAIN_C(0x4024, ch)
+#define REUT_ch_PAT_WDB_CL_MUX_WR_x(ch, x) _MCMAIN_C_X(0x4048, ch, x) /* x in 0 .. 2 */
+#define REUT_ch_PAT_WDB_CL_MUX_RD_x(ch, x) _MCMAIN_C_X(0x4054, ch, x) /* x in 0 .. 2 */
+
+#define REUT_ch_PAT_WDB_CL_MUX_LMN(ch) _MCMAIN_C(0x4078, ch)
+
#define SC_WR_ADD_DELAY_ch(ch) _MCMAIN_C(0x40d0, ch)
#define REUT_ch_MISC_CKE_CTRL(ch) _MCMAIN_C(0x4190, ch)
@@ -110,6 +115,10 @@
#define MC_INIT_STATE_ch(ch) _MCMAIN_C(0x42a0, ch)
#define TC_SRFTP_ch(ch) _MCMAIN_C(0x42a4, ch)
+#define QCLK_ch_LDAT_PDAT(ch) _MCMAIN_C(0x42d0, ch)
+#define QCLK_ch_LDAT_SDAT(ch) _MCMAIN_C(0x42d4, ch)
+#define QCLK_ch_LDAT_DATA_IN_x(ch, x) _MCMAIN_C_X(0x42dc, ch, x) /* x in 0 .. 1 */
+
#define REUT_GLOBAL_ERR 0x4804
#define REUT_ch_SEQ_CFG(ch) (0x48a8 + 8 * (ch))
--
2.39.2
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