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drm/amdgpu: Fix wrap-around bugs in RAS

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Fix the size of the EEPROM from 256000 bytes
to 262144 bytes (256 KiB).

Fix a couple or wrap around bugs. If a valid
value/address is 0 <= addr < size, the inverse of
this inequality (barring negative values which
make no sense here) is addr >= size. Fix this in
the RAS code.

Cc: Jean Delvare <jdelvare@suse.de>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luben Tuikov
2021-02-02 18:36:25 -05:00
committed by Alex Deucher
parent ccdfbfec9e
commit edb63a5308
1 changed files with 10 additions and 10 deletions
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20
drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
View File

@@ -52,12 +52,11 @@
/* Bad GPU tag ‘BADG’ */
#define EEPROM_TABLE_HDR_BAD 0x42414447
/* Assume 2 Mbit size */
#define EEPROM_SIZE_BYTES 256000
#define EEPROM_PAGE__SIZE_BYTES 256
#define EEPROM_HDR_START 0
#define EEPROM_RECORD_START (EEPROM_HDR_START + EEPROM_TABLE_HEADER_SIZE)
#define EEPROM_MAX_RECORD_NUM ((EEPROM_SIZE_BYTES - EEPROM_TABLE_HEADER_SIZE) / EEPROM_TABLE_RECORD_SIZE)
/* Assume 2-Mbit size */
#define EEPROM_SIZE_BYTES (256 * 1024)
#define EEPROM_HDR_START 0
#define EEPROM_RECORD_START (EEPROM_HDR_START + EEPROM_TABLE_HEADER_SIZE)
#define EEPROM_MAX_RECORD_NUM ((EEPROM_SIZE_BYTES - EEPROM_TABLE_HEADER_SIZE) / EEPROM_TABLE_RECORD_SIZE)
#define to_amdgpu_device(x) (container_of(x, struct amdgpu_ras, eeprom_control))->adev
@@ -402,9 +401,8 @@ static uint32_t __correct_eeprom_dest_address(uint32_t curr_address)
uint32_t next_address = curr_address + EEPROM_TABLE_RECORD_SIZE;
/* When all EEPROM memory used jump back to 0 address */
if (next_address > EEPROM_SIZE_BYTES) {
DRM_INFO("Reached end of EEPROM memory, jumping to 0 "
"and overriding old record");
if (next_address >= EEPROM_SIZE_BYTES) {
DRM_INFO("Reached end of EEPROM memory, wrap around to 0.");
return EEPROM_RECORD_START;
}
@@ -476,7 +474,9 @@ int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,
}
/* In case of overflow just start from beginning to not lose newest records */
if (write && (control->next_addr + EEPROM_TABLE_RECORD_SIZE * num > EEPROM_SIZE_BYTES))
if (write &&
(control->next_addr +
EEPROM_TABLE_RECORD_SIZE * num >= EEPROM_SIZE_BYTES))
control->next_addr = EEPROM_RECORD_START;
/*