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lib/spd: respect spd memory part name override 

The BIOS log was looking in the spd data for the part name, but part
names are stripped from generic SPDs.  For these cases, a mainboard
can override the dram part number string, so the spd logging code
needs to check for an override string when logging the dram part
number.

Change print_spd_info() to use an override string if declared.

BUG=b:168724473
TEST="emerge-volteer coreboot chromeos-bootimage", flash and boot
volteer2 and verify that the BIOS log shows a part name when
logging SPD information:

  SPD: module part number is K4U6E3S4AA-MGCL

I also modified volteer to not override the part name and verified
that this change did as expected and printed a blank string.

Change-Id: I91971e07c450492dbb0588abd1c3c692ee0d3bb0
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45459
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Nick Vaccaro 2020-09-16 17:08:00 -07:00
parent 93d483db89
commit 88d4e82b33
1 changed files with 21 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/lib/spd_bin.c
View File

@ -143,34 +143,41 @@ static int spd_get_busw(const uint8_t spd[], int dram_type)
return spd_busw[index];
}
static void spd_get_name(const uint8_t spd[], char spd_name[], int dram_type)
static void spd_get_name(const uint8_t spd[], int type, const char **spd_name, size_t *len)
{
switch (dram_type) {
*spd_name = mainboard_get_dram_part_num();
if (*spd_name != NULL) {
*len = strlen(*spd_name);
return;
}
switch (type) {
case SPD_DRAM_DDR3:
memcpy(spd_name, &spd[DDR3_SPD_PART_OFF], DDR3_SPD_PART_LEN);
spd_name[DDR3_SPD_PART_LEN] = 0;
*spd_name = (const char *) &spd[DDR3_SPD_PART_OFF];
*len = DDR3_SPD_PART_LEN;
break;
case SPD_DRAM_LPDDR3_INTEL:
memcpy(spd_name, &spd[LPDDR3_SPD_PART_OFF],
LPDDR3_SPD_PART_LEN);
spd_name[LPDDR3_SPD_PART_LEN] = 0;
*spd_name = (const char *) &spd[LPDDR3_SPD_PART_OFF];
*len = LPDDR3_SPD_PART_LEN;
break;
/* LPDDR3, LPDDR4 and DDR4 have the same part number offset */
/* LPDDR3, LPDDR4 and DDR4 have same part number offset and length */
case SPD_DRAM_LPDDR3_JEDEC:
case SPD_DRAM_DDR4:
case SPD_DRAM_LPDDR4:
case SPD_DRAM_LPDDR4X:
memcpy(spd_name, &spd[DDR4_SPD_PART_OFF], DDR4_SPD_PART_LEN);
spd_name[DDR4_SPD_PART_LEN] = 0;
*spd_name = (const char *) &spd[DDR4_SPD_PART_OFF];
*len = DDR4_SPD_PART_LEN;
break;
default:
*len = 0;
break;
}
}
void print_spd_info(uint8_t spd[])
{
char spd_name[DDR4_SPD_PART_LEN + 1] = { 0 };
const char *nameptr = NULL;
size_t len;
int type = spd[SPD_DRAM_TYPE];
int banks = spd_get_banks(spd, type);
int capmb = spd_get_capmb(spd);
@ -184,9 +191,9 @@ void print_spd_info(uint8_t spd[])
printk(BIOS_INFO, "SPD: module type is %s\n",
spd_get_module_type_string(type));
/* Module Part Number */
spd_get_name(spd, spd_name, type);
printk(BIOS_INFO, "SPD: module part number is %s\n", spd_name);
spd_get_name(spd, type, &nameptr, &len);
if (nameptr)
printk(BIOS_INFO, "SPD: module part number is %.*s\n", (int) len, nameptr);
printk(BIOS_INFO,
"SPD: banks %d, ranks %d, rows %d, columns %d, density %d Mb\n",