/*
* Copyright 2019 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "amdgpu_ras_eeprom.h"
#include "amdgpu.h"
#include "amdgpu_ras.h"
#include <linux/bits.h>
#include "atom.h"
#include "amdgpu_eeprom.h"
#include "amdgpu_atomfirmware.h"
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include "amdgpu_reset.h"
/* These are memory addresses as would be seen by one or more EEPROM
* chips strung on the I2C bus, usually by manipulating pins 1-3 of a
* set of EEPROM devices. They form a continuous memory space.
*
* The I2C device address includes the device type identifier, 1010b,
* which is a reserved value and indicates that this is an I2C EEPROM
* device. It also includes the top 3 bits of the 19 bit EEPROM memory
* address, namely bits 18, 17, and 16. This makes up the 7 bit
* address sent on the I2C bus with bit 0 being the direction bit,
* which is not represented here, and sent by the hardware directly.
*
* For instance,
* 50h = 1010000b => device type identifier 1010b, bits 18:16 = 000b, address 0.
* 54h = 1010100b => --"--, bits 18:16 = 100b, address 40000h.
* 56h = 1010110b => --"--, bits 18:16 = 110b, address 60000h.
* Depending on the size of the I2C EEPROM device(s), bits 18:16 may
* address memory in a device or a device on the I2C bus, depending on
* the status of pins 1-3. See top of amdgpu_eeprom.c.
*
* The RAS table lives either at address 0 or address 40000h of EEPROM.
*/
#define EEPROM_I2C_MADDR_0 0x0
#define EEPROM_I2C_MADDR_4 0x40000
/*
* The 2 macros bellow represent the actual size in bytes that
* those entities occupy in the EEPROM memory.
* RAS_TABLE_RECORD_SIZE is different than sizeof(eeprom_table_record) which
* uses uint64 to store 6b fields such as retired_page.
*/
#define RAS_TABLE_HEADER_SIZE 20
#define RAS_TABLE_RECORD_SIZE 24
/* Table hdr is 'AMDR' */
#define RAS_TABLE_HDR_VAL 0x414d4452
/* Bad GPU tag ‘BADG’ */
#define RAS_TABLE_HDR_BAD 0x42414447
/*
* EEPROM Table structure v1
* ---------------------------------
* | |
* | EEPROM TABLE HEADER |
* | ( size 20 Bytes ) |
* | |
* ---------------------------------
* | |
* | BAD PAGE RECORD AREA |
