From 910f1118913393828754da9f6a7415a9030cc2a5 Mon Sep 17 00:00:00 2001 From: Jeremy Soller Date: Thu, 7 Mar 2024 09:48:42 -0700 Subject: [PATCH] soc/intel/mtl: Fill in SPD data on both channels of DDR5 memory Commit 91a1276d532b ("soc/intel/alderlake: Implement WA for DDR5 DIMM modules") was added to allow FSP to perform the SPD read for DDR5 modules since coreboot did not properly support reading SPD from EEPROM for DDR5. The same code was copied for Meteorlake. Now that DDR5 SPD EEPROM reading has been fixed in commit e9cb352706c1 ("soc/common/smbus: Support reading SPD5 hubs for DDR5"), remove the now unneeded workaround for DDR5 and use coreboot's SPD read as we do for all other module types. Change-Id: I600d8fd480cb84d5dcb679e4f0bdeeaaebfab386 Signed-off-by: Jeremy Soller Signed-off-by: Tim Crawford Reviewed-on: https://review.coreboot.org/c/coreboot/+/82733 Reviewed-by: Maximilian Brune Tested-by: build bot (Jenkins) --- src/soc/intel/meteorlake/meminit.c | 49 ++++++++++++------------------ 1 file changed, 20 insertions(+), 29 deletions(-) diff --git a/src/soc/intel/meteorlake/meminit.c b/src/soc/intel/meteorlake/meminit.c index 7eea82b4f0..f4cde7e168 100644 --- a/src/soc/intel/meteorlake/meminit.c +++ b/src/soc/intel/meteorlake/meminit.c @@ -73,7 +73,8 @@ static const struct soc_mem_cfg soc_mem_cfg[] = { }, }; -static void mem_init_spd_upds(FSP_M_CONFIG *mem_cfg, const struct mem_channel_data *data) +static void mem_init_spd_upds(FSP_M_CONFIG *mem_cfg, const struct mem_channel_data *data, + bool expand_channels) { efi_uintn_t *spd_upds[MRC_CHANNELS][CONFIG_DIMMS_PER_CHANNEL] = { [0] = { &mem_cfg->MemorySpdPtr000, &mem_cfg->MemorySpdPtr001, }, @@ -106,7 +107,19 @@ static void mem_init_spd_upds(FSP_M_CONFIG *mem_cfg, const struct mem_channel_da for (dimm = 0; dimm < CONFIG_DIMMS_PER_CHANNEL; dimm++) { efi_uintn_t *spd_ptr = spd_upds[ch][dimm]; - *spd_ptr = data->spd[ch][dimm]; + /* + * In DDR5 systems, since each DIMM has 2 channels, + * we need to copy the SPD data such that: + * Channel 0 data is used by channel 0 and 1 + * Channel 2 data is used by channel 2 and 3 + * Channel 4 data is used by channel 4 and 5 + * Channel 6 data is used by channel 6 and 7 + */ + if (expand_channels) + *spd_ptr = data->spd[ch & ~1][dimm]; + else + *spd_ptr = data->spd[ch][dimm]; + if (*spd_ptr) enable_channel = 1; } @@ -172,27 +185,12 @@ static void mem_init_dqs_upds(FSP_M_CONFIG *mem_cfg, const struct mem_channel_da mem_init_dq_dqs_upds(dqs_upds, mb_cfg->dqs_map, upd_size, data, auto_detect); } -#define DDR5_CH_DIMM_OFFSET(ch, dimm) ((ch) * CONFIG_DIMMS_PER_CHANNEL + (dimm)) - -static void ddr5_fill_dimm_module_info(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *mb_cfg, - const struct mem_spd *spd_info) -{ - for (size_t ch = 0; ch < soc_mem_cfg[MEM_TYPE_DDR5].num_phys_channels; ch++) { - for (size_t dimm = 0; dimm < CONFIG_DIMMS_PER_CHANNEL; dimm++) { - size_t mrc_ch = soc_mem_cfg[MEM_TYPE_DDR5].phys_to_mrc_map[ch]; - mem_cfg->SpdAddressTable[DDR5_CH_DIMM_OFFSET(mrc_ch, dimm)] = - spd_info->smbus[ch].addr_dimm[dimm] << 1; - } - } - mem_init_dq_upds(mem_cfg, NULL, mb_cfg, true); - mem_init_dqs_upds(mem_cfg, NULL, mb_cfg, true); -} - void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg, const struct mem_spd *spd_info, bool half_populated) { struct mem_channel_data data; bool dq_dqs_auto_detect = false; + bool expand_channels = false; FSP_M_CONFIG *mem_cfg = &memupd->FspmConfig; mem_cfg->ECT = mb_cfg->ect; @@ -203,14 +201,7 @@ void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg, case MEM_TYPE_DDR5: meminit_ddr(mem_cfg, &mb_cfg->ddr_config); dq_dqs_auto_detect = true; - /* - * TODO: Drop this workaround once SMBus driver in coreboot is updated to - * support DDR5 EEPROM reading. - */ - if (spd_info->topo == MEM_TOPO_DIMM_MODULE) { - ddr5_fill_dimm_module_info(mem_cfg, mb_cfg, spd_info); - return; - } + expand_channels = true; break; case MEM_TYPE_LP5X: meminit_lp5x(mem_cfg, &mb_cfg->lp5x_config); @@ -219,9 +210,9 @@ void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg, die("Unsupported memory type(%d)\n", mb_cfg->type); } - mem_populate_channel_data(memupd, &soc_mem_cfg[mb_cfg->type], spd_info, - half_populated, &data); - mem_init_spd_upds(mem_cfg, &data); + mem_populate_channel_data(memupd, &soc_mem_cfg[mb_cfg->type], spd_info, half_populated, + &data); + mem_init_spd_upds(mem_cfg, &data, expand_channels); mem_init_dq_upds(mem_cfg, &data, mb_cfg, dq_dqs_auto_detect); mem_init_dqs_upds(mem_cfg, &data, mb_cfg, dq_dqs_auto_detect); }