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drm/amdgpu: Calculate EEPROM table ras info bytes sum

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It's more reasonable to check EEPROM table ras info bytes.

Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Stanley.Yang 2023-05-29 10:17:59 +08:00 committed by Alex Deucher
parent 7f599fed3b
commit 7c2551fa1d
1 changed files with 19 additions and 0 deletions
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19
drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
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@ -355,6 +355,21 @@ static u8 __calc_hdr_byte_sum(const struct amdgpu_ras_eeprom_control *control)
return csum;
}
static u8 __calc_ras_info_byte_sum(const struct amdgpu_ras_eeprom_control *control)
{
int ii;
u8 *pp, csum;
size_t sz;
sz = sizeof(control->tbl_rai);
pp = (u8 *) &control->tbl_rai;
csum = 0;
for (ii = 0; ii < sz; ii++, pp++)
csum += *pp;
return csum;
}
static int amdgpu_ras_eeprom_correct_header_tag(
struct amdgpu_ras_eeprom_control *control,
uint32_t header)
@ -414,6 +429,8 @@ int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control)
}
csum = __calc_hdr_byte_sum(control);
if (hdr->version == RAS_TABLE_VER_V2_1)
csum += __calc_ras_info_byte_sum(control);
csum = -csum;
hdr->checksum = csum;
res = __write_table_header(control);
@ -739,6 +756,8 @@ amdgpu_ras_eeprom_update_header(struct amdgpu_ras_eeprom_control *control)
csum += *pp;
csum += __calc_hdr_byte_sum(control);
if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)
csum += __calc_ras_info_byte_sum(control);
/* avoid sign extension when assigning to "checksum" */
csum = -csum;
control->tbl_hdr.checksum = csum;