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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#include <linux/pci.h>
24
25#include "amdgpu.h"
26#include "amdgpu_i2c.h"
27#include "smu_v11_0_i2c.h"
28#include "atom.h"
29#include "amdgpu_fru_eeprom.h"
30
31#define I2C_PRODUCT_INFO_ADDR 0xAC
32#define I2C_PRODUCT_INFO_ADDR_SIZE 0x2
33#define I2C_PRODUCT_INFO_OFFSET 0xC0
34
35static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
36{
37 /* TODO: Gaming SKUs don't have the FRU EEPROM.
38 * Use this hack to address hangs on modprobe on gaming SKUs
39 * until a proper solution can be implemented by only supporting
40 * the explicit chip IDs for VG20 Server cards
41 *
42 * TODO: Add list of supported Arcturus DIDs once confirmed
43 */
44 if ((adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a0) ||
45 (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a1) ||
46 (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a4))
47 return true;
48 return false;
49}
50
51static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
52 unsigned char *buff)
53{
54 int ret, size;
55 struct i2c_msg msg = {
56 .addr = I2C_PRODUCT_INFO_ADDR,
57 .flags = I2C_M_RD,
58 .buf = buff,
59 };
60 buff[0] = 0;
61 buff[1] = addrptr;
62 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + 1;
63 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
64
65 if (ret < 1) {
66 DRM_WARN("FRU: Failed to get size field");
67 return ret;
68 }
69
70 /* The size returned by the i2c requires subtraction of 0xC0 since the
71 * size apparently always reports as 0xC0+actual size.
72 */
73 size = buff[2] - I2C_PRODUCT_INFO_OFFSET;
74 /* Add 1 since address field was 1 byte */
75 buff[1] = addrptr + 1;
76
77 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + size;
78 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
79
80 if (ret < 1) {
81 DRM_WARN("FRU: Failed to get data field");
82 return ret;
83 }
84
85 return size;
86}
87
88int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
89{
90 unsigned char buff[34];
91 int addrptr = 0, size = 0;
92
93 if (!is_fru_eeprom_supported(adev))
94 return 0;
95
96 /* If algo exists, it means that the i2c_adapter's initialized */
97 if (!adev->pm.smu_i2c.algo) {
98 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
99 return 0;
100 }
101
102 /* There's a lot of repetition here. This is due to the FRU having
103 * variable-length fields. To get the information, we have to find the
104 * size of each field, and then keep reading along and reading along
105 * until we get all of the data that we want. We use addrptr to track
106 * the address as we go
107 */
108
109 /* The first fields are all of size 1-byte, from 0-7 are offsets that
110 * contain information that isn't useful to us.
111 * Bytes 8-a are all 1-byte and refer to the size of the entire struct,
112 * and the language field, so just start from 0xb, manufacturer size
113 */
114 addrptr = 0xb;
115 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
116 if (size < 1) {
117 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
118 return size;
119 }
120
121 /* Increment the addrptr by the size of the field, and 1 due to the
122 * size field being 1 byte. This pattern continues below.
123 */
124 addrptr += size + 1;
125 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
126 if (size < 1) {
127 DRM_ERROR("Failed to read FRU product name, ret:%d", size);
128 return size;
129 }
130
131 /* Product name should only be 32 characters. Any more,
132 * and something could be wrong. Cap it at 32 to be safe
133 */
134 if (size > 32) {
135 DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake");
136 size = 32;
137 }
138 /* Start at 2 due to buff using fields 0 and 1 for the address */
139 memcpy(adev->product_name, &buff[2], size);
140 adev->product_name[size] = '\0';
141
142 addrptr += size + 1;
143 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
144 if (size < 1) {
145 DRM_ERROR("Failed to read FRU product number, ret:%d", size);
146 return size;
147 }
148
149 /* Product number should only be 16 characters. Any more,
150 * and something could be wrong. Cap it at 16 to be safe
151 */
152 if (size > 16) {
153 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
154 size = 16;
155 }
156 memcpy(adev->product_number, &buff[2], size);
157 adev->product_number[size] = '\0';
158
159 addrptr += size + 1;
160 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
161
162 if (size < 1) {
163 DRM_ERROR("Failed to read FRU product version, ret:%d", size);
164 return size;
165 }
166
167 addrptr += size + 1;
168 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
169
170 if (size < 1) {
171 DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
172 return size;
173 }
174
175 /* Serial number should only be 16 characters. Any more,
176 * and something could be wrong. Cap it at 16 to be safe
177 */
178 if (size > 16) {
179 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
180 size = 16;
181 }
182 memcpy(adev->serial, &buff[2], size);
183 adev->serial[size] = '\0';
184
185 return 0;
186}
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#include <linux/pci.h>
24
25#include "amdgpu.h"
26#include "amdgpu_i2c.h"
27#include "smu_v11_0_i2c.h"
28#include "atom.h"
29#include "amdgpu_fru_eeprom.h"
30
31#define I2C_PRODUCT_INFO_ADDR 0xAC
32#define I2C_PRODUCT_INFO_ADDR_SIZE 0x2
33#define I2C_PRODUCT_INFO_OFFSET 0xC0
34
35static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
36{
37 /* Only server cards have the FRU EEPROM
38 * TODO: See if we can figure this out dynamically instead of
39 * having to parse VBIOS versions.
40 */
41 struct atom_context *atom_ctx = adev->mode_info.atom_context;
42
43 /* VBIOS is of the format ###-DXXXYY-##. For SKU identification,
44 * we can use just the "DXXX" portion. If there were more models, we
45 * could convert the 3 characters to a hex integer and use a switch
46 * for ease/speed/readability. For now, 2 string comparisons are
47 * reasonable and not too expensive
48 */
49 switch (adev->asic_type) {
50 case CHIP_VEGA20:
51 /* D161 and D163 are the VG20 server SKUs */
52 if (strnstr(atom_ctx->vbios_version, "D161",
53 sizeof(atom_ctx->vbios_version)) ||
54 strnstr(atom_ctx->vbios_version, "D163",
55 sizeof(atom_ctx->vbios_version)))
56 return true;
57 else
58 return false;
59 default:
60 return false;
61 }
62}
63
64static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
65 unsigned char *buff)
66{
67 int ret, size;
68 struct i2c_msg msg = {
69 .addr = I2C_PRODUCT_INFO_ADDR,
70 .flags = I2C_M_RD,
71 .buf = buff,
72 };
73 buff[0] = 0;
74 buff[1] = addrptr;
75 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + 1;
76 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
77
78 if (ret < 1) {
79 DRM_WARN("FRU: Failed to get size field");
80 return ret;
81 }
82
83 /* The size returned by the i2c requires subtraction of 0xC0 since the
84 * size apparently always reports as 0xC0+actual size.
85 */
86 size = buff[2] - I2C_PRODUCT_INFO_OFFSET;
87 /* Add 1 since address field was 1 byte */
88 buff[1] = addrptr + 1;
89
90 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + size;
91 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
92
93 if (ret < 1) {
94 DRM_WARN("FRU: Failed to get data field");
95 return ret;
96 }
97
98 return size;
99}
100
101int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
102{
103 unsigned char buff[34];
104 int addrptr, size;
105 int len;
106
107 if (!is_fru_eeprom_supported(adev))
108 return 0;
109
110 /* If algo exists, it means that the i2c_adapter's initialized */
111 if (!adev->pm.smu_i2c.algo) {
112 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
113 return -ENODEV;
114 }
115
116 /* There's a lot of repetition here. This is due to the FRU having
117 * variable-length fields. To get the information, we have to find the
118 * size of each field, and then keep reading along and reading along
119 * until we get all of the data that we want. We use addrptr to track
120 * the address as we go
121 */
122
123 /* The first fields are all of size 1-byte, from 0-7 are offsets that
124 * contain information that isn't useful to us.
125 * Bytes 8-a are all 1-byte and refer to the size of the entire struct,
126 * and the language field, so just start from 0xb, manufacturer size
127 */
128 addrptr = 0xb;
129 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
130 if (size < 1) {
131 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
132 return -EINVAL;
133 }
134
135 /* Increment the addrptr by the size of the field, and 1 due to the
136 * size field being 1 byte. This pattern continues below.
137 */
138 addrptr += size + 1;
139 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
140 if (size < 1) {
141 DRM_ERROR("Failed to read FRU product name, ret:%d", size);
142 return -EINVAL;
143 }
144
145 len = size;
146 /* Product name should only be 32 characters. Any more,
147 * and something could be wrong. Cap it at 32 to be safe
148 */
149 if (len >= sizeof(adev->product_name)) {
150 DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake");
151 len = sizeof(adev->product_name) - 1;
152 }
153 /* Start at 2 due to buff using fields 0 and 1 for the address */
154 memcpy(adev->product_name, &buff[2], len);
155 adev->product_name[len] = '\0';
156
157 addrptr += size + 1;
158 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
159 if (size < 1) {
160 DRM_ERROR("Failed to read FRU product number, ret:%d", size);
161 return -EINVAL;
162 }
163
164 len = size;
165 /* Product number should only be 16 characters. Any more,
166 * and something could be wrong. Cap it at 16 to be safe
167 */
168 if (len >= sizeof(adev->product_number)) {
169 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
170 len = sizeof(adev->product_number) - 1;
171 }
172 memcpy(adev->product_number, &buff[2], len);
173 adev->product_number[len] = '\0';
174
175 addrptr += size + 1;
176 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
177
178 if (size < 1) {
179 DRM_ERROR("Failed to read FRU product version, ret:%d", size);
180 return -EINVAL;
181 }
182
183 addrptr += size + 1;
184 size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
185
186 if (size < 1) {
187 DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
188 return -EINVAL;
189 }
190
191 len = size;
192 /* Serial number should only be 16 characters. Any more,
193 * and something could be wrong. Cap it at 16 to be safe
194 */
195 if (len >= sizeof(adev->serial)) {
196 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
197 len = sizeof(adev->serial) - 1;
198 }
199 memcpy(adev->serial, &buff[2], len);
200 adev->serial[len] = '\0';
201
202 return 0;
203}