Line data Source code
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 :
34 0 : 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 0 : 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 0 : 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 0 : switch (adev->asic_type) {
55 : case CHIP_VEGA20:
56 : /* D161 and D163 are the VG20 server SKUs */
57 0 : if (strnstr(atom_ctx->vbios_version, "D161",
58 0 : sizeof(atom_ctx->vbios_version)) ||
59 0 : 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 0 : if (strnstr(atom_ctx->vbios_version, "D603",
69 : sizeof(atom_ctx->vbios_version))) {
70 0 : 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 :
83 0 : 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 0 : ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr, buf, 1);
90 0 : if (ret < 1) {
91 0 : 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 0 : size = buf[0] & 0x3F;
99 0 : size = min_t(size_t, size, buf_size);
100 :
101 0 : ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr + 1,
102 : buf, size);
103 0 : if (ret < 1) {
104 0 : DRM_WARN("FRU: Failed to get data field");
105 : return ret;
106 : }
107 :
108 : return size;
109 : }
110 :
111 0 : 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 0 : if (!is_fru_eeprom_supported(adev))
118 : return 0;
119 :
120 : /* If algo exists, it means that the i2c_adapter's initialized */
121 0 : if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
122 0 : DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
123 0 : 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 0 : addrptr = FRU_EEPROM_MADDR + 0xb;
139 0 : size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
140 0 : if (size < 1) {
141 0 : DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
142 0 : 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 0 : addrptr += size + 1;
149 0 : size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
150 0 : if (size < 1) {
151 0 : DRM_ERROR("Failed to read FRU product name, ret:%d", size);
152 0 : return -EINVAL;
153 : }
154 :
155 0 : len = size;
156 0 : if (len >= AMDGPU_PRODUCT_NAME_LEN) {
157 0 : DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake",
158 : AMDGPU_PRODUCT_NAME_LEN);
159 0 : len = AMDGPU_PRODUCT_NAME_LEN - 1;
160 : }
161 0 : memcpy(adev->product_name, buf, len);
162 0 : adev->product_name[len] = '\0';
163 :
164 0 : addrptr += size + 1;
165 0 : size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
166 0 : if (size < 1) {
167 0 : DRM_ERROR("Failed to read FRU product number, ret:%d", size);
168 0 : return -EINVAL;
169 : }
170 :
171 0 : 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 0 : if (len >= sizeof(adev->product_number)) {
176 0 : DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
177 0 : len = sizeof(adev->product_number) - 1;
178 : }
179 0 : memcpy(adev->product_number, buf, len);
180 0 : adev->product_number[len] = '\0';
181 :
182 0 : addrptr += size + 1;
183 0 : size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
184 :
185 0 : if (size < 1) {
186 0 : DRM_ERROR("Failed to read FRU product version, ret:%d", size);
187 0 : return -EINVAL;
188 : }
189 :
190 0 : addrptr += size + 1;
191 0 : size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
192 :
193 0 : if (size < 1) {
194 0 : DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
195 0 : return -EINVAL;
196 : }
197 :
198 0 : 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 0 : if (len >= sizeof(adev->serial)) {
203 0 : DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
204 0 : len = sizeof(adev->serial) - 1;
205 : }
206 0 : memcpy(adev->serial, buf, len);
207 0 : adev->serial[len] = '\0';
208 :
209 0 : return 0;
210 : }
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