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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#include "amdgpu_eeprom.h"
31
32#define FRU_EEPROM_MADDR_6 0x60000
33#define FRU_EEPROM_MADDR_8 0x80000
34
35static bool is_fru_eeprom_supported(struct amdgpu_device *adev, u32 *fru_addr)
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 /* The i2c access is blocked on VF
44 * TODO: Need other way to get the info
45 */
46 if (amdgpu_sriov_vf(adev))
47 return false;
48
49 /* The default I2C EEPROM address of the FRU.
50 */
51 if (fru_addr)
52 *fru_addr = FRU_EEPROM_MADDR_8;
53
54 /* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
55 * we can use just the "DXXX" portion. If there were more models, we
56 * could convert the 3 characters to a hex integer and use a switch
57 * for ease/speed/readability. For now, 2 string comparisons are
58 * reasonable and not too expensive
59 */
60 switch (adev->asic_type) {
61 case CHIP_VEGA20:
62 /* D161 and D163 are the VG20 server SKUs */
63 if (strnstr(atom_ctx->vbios_version, "D161",
64 sizeof(atom_ctx->vbios_version)) ||
65 strnstr(atom_ctx->vbios_version, "D163",
66 sizeof(atom_ctx->vbios_version))) {
67 if (fru_addr)
68 *fru_addr = FRU_EEPROM_MADDR_6;
69 return true;
70 } else {
71 return false;
72 }
73 case CHIP_ALDEBARAN:
74 /* All Aldebaran SKUs have an FRU */
75 if (!strnstr(atom_ctx->vbios_version, "D673",
76 sizeof(atom_ctx->vbios_version)))
77 if (fru_addr)
78 *fru_addr = FRU_EEPROM_MADDR_6;
79 return true;
80 case CHIP_SIENNA_CICHLID:
81 if (strnstr(atom_ctx->vbios_version, "D603",
82 sizeof(atom_ctx->vbios_version))) {
83 if (strnstr(atom_ctx->vbios_version, "D603GLXE",
84 sizeof(atom_ctx->vbios_version))) {
85 return false;
86 } else {
87 if (fru_addr)
88 *fru_addr = FRU_EEPROM_MADDR_6;
89 return true;
90 }
91 } else {
92 return false;
93 }
94 default:
95 return false;
96 }
97}
98
99int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
100{
101 unsigned char buf[8], *pia;
102 u32 addr, fru_addr;
103 int size, len;
104 u8 csum;
105
106 if (!is_fru_eeprom_supported(adev, &fru_addr))
107 return 0;
108
109 /* If algo exists, it means that the i2c_adapter's initialized */
110 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
111 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
112 return -ENODEV;
113 }
114
115 /* Read the IPMI Common header */
116 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
117 sizeof(buf));
118 if (len != 8) {
119 DRM_ERROR("Couldn't read the IPMI Common Header: %d", len);
120 return len < 0 ? len : -EIO;
121 }
122
123 if (buf[0] != 1) {
124 DRM_ERROR("Bad IPMI Common Header version: 0x%02x", buf[0]);
125 return -EIO;
126 }
127
128 for (csum = 0; len > 0; len--)
129 csum += buf[len - 1];
130 if (csum) {
131 DRM_ERROR("Bad IPMI Common Header checksum: 0x%02x", csum);
132 return -EIO;
133 }
134
135 /* Get the offset to the Product Info Area (PIA). */
136 addr = buf[4] * 8;
137 if (!addr)
138 return 0;
139
140 /* Get the absolute address to the PIA. */
141 addr += fru_addr;
142
143 /* Read the header of the PIA. */
144 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
145 if (len != 3) {
146 DRM_ERROR("Couldn't read the Product Info Area header: %d", len);
147 return len < 0 ? len : -EIO;
148 }
149
150 if (buf[0] != 1) {
151 DRM_ERROR("Bad IPMI Product Info Area version: 0x%02x", buf[0]);
152 return -EIO;
153 }
154
155 size = buf[1] * 8;
156 pia = kzalloc(size, GFP_KERNEL);
157 if (!pia)
158 return -ENOMEM;
159
160 /* Read the whole PIA. */
161 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
162 if (len != size) {
163 kfree(pia);
164 DRM_ERROR("Couldn't read the Product Info Area: %d", len);
165 return len < 0 ? len : -EIO;
166 }
167
168 for (csum = 0; size > 0; size--)
169 csum += pia[size - 1];
170 if (csum) {
171 DRM_ERROR("Bad Product Info Area checksum: 0x%02x", csum);
172 return -EIO;
173 }
174
175 /* Now extract useful information from the PIA.
176 *
177 * Skip the Manufacturer Name at [3] and go directly to
178 * the Product Name field.
179 */
180 addr = 3 + 1 + (pia[3] & 0x3F);
181 if (addr + 1 >= len)
182 goto Out;
183 memcpy(adev->product_name, pia + addr + 1,
184 min_t(size_t,
185 sizeof(adev->product_name),
186 pia[addr] & 0x3F));
187 adev->product_name[sizeof(adev->product_name) - 1] = '\0';
188
189 /* Go to the Product Part/Model Number field. */
190 addr += 1 + (pia[addr] & 0x3F);
191 if (addr + 1 >= len)
192 goto Out;
193 memcpy(adev->product_number, pia + addr + 1,
194 min_t(size_t,
195 sizeof(adev->product_number),
196 pia[addr] & 0x3F));
197 adev->product_number[sizeof(adev->product_number) - 1] = '\0';
198
199 /* Go to the Product Version field. */
200 addr += 1 + (pia[addr] & 0x3F);
201
202 /* Go to the Product Serial Number field. */
203 addr += 1 + (pia[addr] & 0x3F);
204 if (addr + 1 >= len)
205 goto Out;
206 memcpy(adev->serial, pia + addr + 1, min_t(size_t,
207 sizeof(adev->serial),
208 pia[addr] & 0x3F));
209 adev->serial[sizeof(adev->serial) - 1] = '\0';
210Out:
211 kfree(pia);
212 return 0;
213}
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}