drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.h

   1 /*
   2  * Copyright 2019 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #ifndef _AMDGPU_RAS_EEPROM_H
  25 #define _AMDGPU_RAS_EEPROM_H
  26
  27 #include <linux/i2c.h>
  28
  29 struct amdgpu_device;
  30
  31 enum amdgpu_ras_eeprom_err_type{
  32         AMDGPU_RAS_EEPROM_ERR_PLACE_HOLDER,
  33         AMDGPU_RAS_EEPROM_ERR_RECOVERABLE,
  34         AMDGPU_RAS_EEPROM_ERR_NON_RECOVERABLE
  35 };
  36
  37 struct amdgpu_ras_eeprom_table_header {
  38         uint32_t header;
  39         uint32_t version;
  40         uint32_t first_rec_offset;
  41         uint32_t tbl_size;
  42         uint32_t checksum;
  43 }__attribute__((__packed__));
  44
  45 struct amdgpu_ras_eeprom_control {
  46         struct amdgpu_ras_eeprom_table_header tbl_hdr;
  47         struct i2c_adapter eeprom_accessor;
  48         uint32_t next_addr;
  49         unsigned int num_recs;
  50         struct mutex tbl_mutex;
  51         bool bus_locked;
  52         uint32_t tbl_byte_sum;
  53         uint16_t i2c_address; // 8-bit represented address
  54 };
  55
  56 /*
  57  * Represents single table record. Packed to be easily serialized into byte
  58  * stream.
  59  */
  60 struct eeprom_table_record {
  61
  62         union {
  63                 uint64_t address;
  64                 uint64_t offset;
  65         };
  66
  67         uint64_t retired_page;
  68         uint64_t ts;
  69
  70         enum amdgpu_ras_eeprom_err_type err_type;
  71
  72         union {
  73                 unsigned char bank;
  74                 unsigned char cu;
  75         };
  76
  77         unsigned char mem_channel;
  78         unsigned char mcumc_id;
  79 }__attribute__((__packed__));
  80
  81 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control);
  82 void amdgpu_ras_eeprom_fini(struct amdgpu_ras_eeprom_control *control);
  83 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control);
  84
  85 int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,
  86                                             struct eeprom_table_record *records,
  87                                             bool write,
  88                                             int num);
  89
  90 void amdgpu_ras_eeprom_test(struct amdgpu_ras_eeprom_control *control);
  91
  92 #endif // _AMDGPU_RAS_EEPROM_H