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 #include "amdgpu_eeprom.h"
31
32 #define FRU_EEPROM_MADDR 0x60000
33
is_fru_eeprom_supported(struct amdgpu_device * adev)34 static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
35 {
36 /* Only server cards have the FRU EEPROM
37 * TODO: See if we can figure this out dynamically instead of
38 * having to parse VBIOS versions.
39 */
40 struct atom_context *atom_ctx = adev->mode_info.atom_context;
41
42 /* The i2c access is blocked on VF
43 * TODO: Need other way to get the info
44 */
45 if (amdgpu_sriov_vf(adev))
46 return false;
47
48 /* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
49 * we can use just the "DXXX" portion. If there were more models, we
50 * could convert the 3 characters to a hex integer and use a switch
51 * for ease/speed/readability. For now, 2 string comparisons are
52 * reasonable and not too expensive
53 */
54 switch (adev->asic_type) {
55 case CHIP_VEGA20:
56 /* D161 and D163 are the VG20 server SKUs */
57 if (strnstr(atom_ctx->vbios_version, "D161",
58 sizeof(atom_ctx->vbios_version)) ||
59 strnstr(atom_ctx->vbios_version, "D163",
60 sizeof(atom_ctx->vbios_version)))
61 return true;
62 else
63 return false;
64 case CHIP_ALDEBARAN:
65 /* All Aldebaran SKUs have the FRU */
66 return true;
67 case CHIP_SIENNA_CICHLID:
68 if (strnstr(atom_ctx->vbios_version, "D603",
69 sizeof(atom_ctx->vbios_version))) {
70 if (strnstr(atom_ctx->vbios_version, "D603GLXE",
71 sizeof(atom_ctx->vbios_version)))
72 return false;
73 else
74 return true;
75 } else {
76 return false;
77 }
78 default:
79 return false;
80 }
81 }
82
amdgpu_fru_read_eeprom(struct amdgpu_device * adev,uint32_t addrptr,unsigned char * buf,size_t buf_size)83 static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
84 unsigned char *buf, size_t buf_size)
85 {
86 int ret;
87 u8 size;
88
89 ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr, buf, 1);
90 if (ret < 1) {
91 DRM_WARN("FRU: Failed to get size field");
92 return ret;
93 }
94
95 /* The size returned by the i2c requires subtraction of 0xC0 since the
96 * size apparently always reports as 0xC0+actual size.
97 */
98 size = buf[0] & 0x3F;
99 size = min_t(size_t, size, buf_size);
100
101 ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr + 1,
102 buf, size);
103 if (ret < 1) {
104 DRM_WARN("FRU: Failed to get data field");
105 return ret;
106 }
107
108 return size;
109 }
110
amdgpu_fru_get_product_info(struct amdgpu_device * adev)111 int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
112 {
113 unsigned char buf[AMDGPU_PRODUCT_NAME_LEN];
114 u32 addrptr;
115 int size, len;
116
117 if (!is_fru_eeprom_supported(adev))
118 return 0;
119
120 /* If algo exists, it means that the i2c_adapter's initialized */
121 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
122 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
123 return -ENODEV;
124 }
125
126 /* There's a lot of repetition here. This is due to the FRU having
127 * variable-length fields. To get the information, we have to find the
128 * size of each field, and then keep reading along and reading along
129 * until we get all of the data that we want. We use addrptr to track
130 * the address as we go
131 */
132
133 /* The first fields are all of size 1-byte, from 0-7 are offsets that
134 * contain information that isn't useful to us.
135 * Bytes 8-a are all 1-byte and refer to the size of the entire struct,
136 * and the language field, so just start from 0xb, manufacturer size
137 */
138 addrptr = FRU_EEPROM_MADDR + 0xb;
139 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
140 if (size < 1) {
141 DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
142 return -EINVAL;
143 }
144
145 /* Increment the addrptr by the size of the field, and 1 due to the
146 * size field being 1 byte. This pattern continues below.
147 */
148 addrptr += size + 1;
149 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
150 if (size < 1) {
151 DRM_ERROR("Failed to read FRU product name, ret:%d", size);
152 return -EINVAL;
153 }
154
155 len = size;
156 if (len >= AMDGPU_PRODUCT_NAME_LEN) {
157 DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake",
158 AMDGPU_PRODUCT_NAME_LEN);
159 len = AMDGPU_PRODUCT_NAME_LEN - 1;
160 }
161 memcpy(adev->product_name, buf, len);
162 adev->product_name[len] = '\0';
163
164 addrptr += size + 1;
165 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
166 if (size < 1) {
167 DRM_ERROR("Failed to read FRU product number, ret:%d", size);
168 return -EINVAL;
169 }
170
171 len = size;
172 /* Product number should only be 16 characters. Any more,
173 * and something could be wrong. Cap it at 16 to be safe
174 */
175 if (len >= sizeof(adev->product_number)) {
176 DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
177 len = sizeof(adev->product_number) - 1;
178 }
179 memcpy(adev->product_number, buf, len);
180 adev->product_number[len] = '\0';
181
182 addrptr += size + 1;
183 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
184
185 if (size < 1) {
186 DRM_ERROR("Failed to read FRU product version, ret:%d", size);
187 return -EINVAL;
188 }
189
190 addrptr += size + 1;
191 size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
192
193 if (size < 1) {
194 DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
195 return -EINVAL;
196 }
197
198 len = size;
199 /* Serial number should only be 16 characters. Any more,
200 * and something could be wrong. Cap it at 16 to be safe
201 */
202 if (len >= sizeof(adev->serial)) {
203 DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
204 len = sizeof(adev->serial) - 1;
205 }
206 memcpy(adev->serial, buf, len);
207 adev->serial[len] = '\0';
208
209 return 0;
210 }
211