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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#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 * Also, FRU not valid for APU devices.
46 */
47 if (amdgpu_sriov_vf(adev) || (adev->flags & AMD_IS_APU))
48 return false;
49
50 /* The default I2C EEPROM address of the FRU.
51 */
52 if (fru_addr)
53 *fru_addr = FRU_EEPROM_MADDR_8;
54
55 /* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
56 * we can use just the "DXXX" portion. If there were more models, we
57 * could convert the 3 characters to a hex integer and use a switch
58 * for ease/speed/readability. For now, 2 string comparisons are
59 * reasonable and not too expensive
60 */
61 switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
62 case IP_VERSION(11, 0, 2):
63 switch (adev->asic_type) {
64 case CHIP_VEGA20:
65 /* D161 and D163 are the VG20 server SKUs */
66 if (strnstr(atom_ctx->vbios_pn, "D161",
67 sizeof(atom_ctx->vbios_pn)) ||
68 strnstr(atom_ctx->vbios_pn, "D163",
69 sizeof(atom_ctx->vbios_pn))) {
70 if (fru_addr)
71 *fru_addr = FRU_EEPROM_MADDR_6;
72 return true;
73 } else {
74 return false;
75 }
76 case CHIP_ARCTURUS:
77 default:
78 return false;
79 }
80 case IP_VERSION(11, 0, 7):
81 if (strnstr(atom_ctx->vbios_pn, "D603",
82 sizeof(atom_ctx->vbios_pn))) {
83 if (strnstr(atom_ctx->vbios_pn, "D603GLXE",
84 sizeof(atom_ctx->vbios_pn))) {
85 return false;
86 }
87
88 if (fru_addr)
89 *fru_addr = FRU_EEPROM_MADDR_6;
90 return true;
91
92 } else {
93 return false;
94 }
95 case IP_VERSION(13, 0, 2):
96 /* All Aldebaran SKUs have an FRU */
97 if (!strnstr(atom_ctx->vbios_pn, "D673",
98 sizeof(atom_ctx->vbios_pn)))
99 if (fru_addr)
100 *fru_addr = FRU_EEPROM_MADDR_6;
101 return true;
102 case IP_VERSION(13, 0, 6):
103 case IP_VERSION(13, 0, 14):
104 if (fru_addr)
105 *fru_addr = FRU_EEPROM_MADDR_8;
106 return true;
107 default:
108 return false;
109 }
110}
111
112int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
113{
114 struct amdgpu_fru_info *fru_info;
115 unsigned char buf[8], *pia;
116 u32 addr, fru_addr;
117 int size, len;
118 u8 csum;
119
120 if (!is_fru_eeprom_supported(adev, &fru_addr))
121 return 0;
122
123 if (!adev->fru_info) {
124 adev->fru_info = kzalloc(sizeof(*adev->fru_info), GFP_KERNEL);
125 if (!adev->fru_info)
126 return -ENOMEM;
127 }
128
129 fru_info = adev->fru_info;
130 /* For Arcturus-and-later, default value of serial_number is unique_id
131 * so convert it to a 16-digit HEX string for convenience and
132 * backwards-compatibility.
133 */
134 sprintf(fru_info->serial, "%llx", adev->unique_id);
135
136 /* If algo exists, it means that the i2c_adapter's initialized */
137 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
138 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
139 return -ENODEV;
140 }
141
142 /* Read the IPMI Common header */
143 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
144 sizeof(buf));
145 if (len != 8) {
146 DRM_ERROR("Couldn't read the IPMI Common Header: %d", len);
147 return len < 0 ? len : -EIO;
148 }
149
150 if (buf[0] != 1) {
151 DRM_ERROR("Bad IPMI Common Header version: 0x%02x", buf[0]);
152 return -EIO;
153 }
154
155 for (csum = 0; len > 0; len--)
156 csum += buf[len - 1];
157 if (csum) {
158 DRM_ERROR("Bad IPMI Common Header checksum: 0x%02x", csum);
159 return -EIO;
160 }
161
162 /* Get the offset to the Product Info Area (PIA). */
163 addr = buf[4] * 8;
164 if (!addr)
165 return 0;
166
167 /* Get the absolute address to the PIA. */
168 addr += fru_addr;
169
170 /* Read the header of the PIA. */
171 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
172 if (len != 3) {
173 DRM_ERROR("Couldn't read the Product Info Area header: %d", len);
174 return len < 0 ? len : -EIO;
175 }
176
177 if (buf[0] != 1) {
178 DRM_ERROR("Bad IPMI Product Info Area version: 0x%02x", buf[0]);
179 return -EIO;
180 }
181
182 size = buf[1] * 8;
183 pia = kzalloc(size, GFP_KERNEL);
184 if (!pia)
185 return -ENOMEM;
186
187 /* Read the whole PIA. */
188 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
189 if (len != size) {
190 kfree(pia);
191 DRM_ERROR("Couldn't read the Product Info Area: %d", len);
192 return len < 0 ? len : -EIO;
193 }
194
195 for (csum = 0; size > 0; size--)
196 csum += pia[size - 1];
197 if (csum) {
198 DRM_ERROR("Bad Product Info Area checksum: 0x%02x", csum);
199 kfree(pia);
200 return -EIO;
201 }
202
203 /* Now extract useful information from the PIA.
204 *
205 * Read Manufacturer Name field whose length is [3].
206 */
207 addr = 3;
208 if (addr + 1 >= len)
209 goto Out;
210 memcpy(fru_info->manufacturer_name, pia + addr + 1,
211 min_t(size_t, sizeof(fru_info->manufacturer_name),
212 pia[addr] & 0x3F));
213 fru_info->manufacturer_name[sizeof(fru_info->manufacturer_name) - 1] =
214 '\0';
215
216 /* Read Product Name field. */
217 addr += 1 + (pia[addr] & 0x3F);
218 if (addr + 1 >= len)
219 goto Out;
220 memcpy(fru_info->product_name, pia + addr + 1,
221 min_t(size_t, sizeof(fru_info->product_name), pia[addr] & 0x3F));
222 fru_info->product_name[sizeof(fru_info->product_name) - 1] = '\0';
223
224 /* Go to the Product Part/Model Number field. */
225 addr += 1 + (pia[addr] & 0x3F);
226 if (addr + 1 >= len)
227 goto Out;
228 memcpy(fru_info->product_number, pia + addr + 1,
229 min_t(size_t, sizeof(fru_info->product_number),
230 pia[addr] & 0x3F));
231 fru_info->product_number[sizeof(fru_info->product_number) - 1] = '\0';
232
233 /* Go to the Product Version field. */
234 addr += 1 + (pia[addr] & 0x3F);
235
236 /* Go to the Product Serial Number field. */
237 addr += 1 + (pia[addr] & 0x3F);
238 if (addr + 1 >= len)
239 goto Out;
240 memcpy(fru_info->serial, pia + addr + 1,
241 min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));
242 fru_info->serial[sizeof(fru_info->serial) - 1] = '\0';
243
244 /* Asset Tag field */
245 addr += 1 + (pia[addr] & 0x3F);
246
247 /* FRU File Id field. This could be 'null'. */
248 addr += 1 + (pia[addr] & 0x3F);
249 if ((addr + 1 >= len) || !(pia[addr] & 0x3F))
250 goto Out;
251 memcpy(fru_info->fru_id, pia + addr + 1,
252 min_t(size_t, sizeof(fru_info->fru_id), pia[addr] & 0x3F));
253 fru_info->fru_id[sizeof(fru_info->fru_id) - 1] = '\0';
254
255Out:
256 kfree(pia);
257 return 0;
258}
259
260/**
261 * DOC: product_name
262 *
263 * The amdgpu driver provides a sysfs API for reporting the product name
264 * for the device
265 * The file product_name is used for this and returns the product name
266 * as returned from the FRU.
267 * NOTE: This is only available for certain server cards
268 */
269
270static ssize_t amdgpu_fru_product_name_show(struct device *dev,
271 struct device_attribute *attr,
272 char *buf)
273{
274 struct drm_device *ddev = dev_get_drvdata(dev);
275 struct amdgpu_device *adev = drm_to_adev(ddev);
276
277 return sysfs_emit(buf, "%s\n", adev->fru_info->product_name);
278}
279
280static DEVICE_ATTR(product_name, 0444, amdgpu_fru_product_name_show, NULL);
281
282/**
283 * DOC: product_number
284 *
285 * The amdgpu driver provides a sysfs API for reporting the part number
286 * for the device
287 * The file product_number is used for this and returns the part number
288 * as returned from the FRU.
289 * NOTE: This is only available for certain server cards
290 */
291
292static ssize_t amdgpu_fru_product_number_show(struct device *dev,
293 struct device_attribute *attr,
294 char *buf)
295{
296 struct drm_device *ddev = dev_get_drvdata(dev);
297 struct amdgpu_device *adev = drm_to_adev(ddev);
298
299 return sysfs_emit(buf, "%s\n", adev->fru_info->product_number);
300}
301
302static DEVICE_ATTR(product_number, 0444, amdgpu_fru_product_number_show, NULL);
303
304/**
305 * DOC: serial_number
306 *
307 * The amdgpu driver provides a sysfs API for reporting the serial number
308 * for the device
309 * The file serial_number is used for this and returns the serial number
310 * as returned from the FRU.
311 * NOTE: This is only available for certain server cards
312 */
313
314static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
315 struct device_attribute *attr,
316 char *buf)
317{
318 struct drm_device *ddev = dev_get_drvdata(dev);
319 struct amdgpu_device *adev = drm_to_adev(ddev);
320
321 return sysfs_emit(buf, "%s\n", adev->fru_info->serial);
322}
323
324static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);
325
326/**
327 * DOC: fru_id
328 *
329 * The amdgpu driver provides a sysfs API for reporting FRU File Id
330 * for the device.
331 * The file fru_id is used for this and returns the File Id value
332 * as returned from the FRU.
333 * NOTE: This is only available for certain server cards
334 */
335
336static ssize_t amdgpu_fru_id_show(struct device *dev,
337 struct device_attribute *attr, char *buf)
338{
339 struct drm_device *ddev = dev_get_drvdata(dev);
340 struct amdgpu_device *adev = drm_to_adev(ddev);
341
342 return sysfs_emit(buf, "%s\n", adev->fru_info->fru_id);
343}
344
345static DEVICE_ATTR(fru_id, 0444, amdgpu_fru_id_show, NULL);
346
347/**
348 * DOC: manufacturer
349 *
350 * The amdgpu driver provides a sysfs API for reporting manufacturer name from
351 * FRU information.
352 * The file manufacturer returns the value as returned from the FRU.
353 * NOTE: This is only available for certain server cards
354 */
355
356static ssize_t amdgpu_fru_manufacturer_name_show(struct device *dev,
357 struct device_attribute *attr,
358 char *buf)
359{
360 struct drm_device *ddev = dev_get_drvdata(dev);
361 struct amdgpu_device *adev = drm_to_adev(ddev);
362
363 return sysfs_emit(buf, "%s\n", adev->fru_info->manufacturer_name);
364}
365
366static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL);
367
368static const struct attribute *amdgpu_fru_attributes[] = {
369 &dev_attr_product_name.attr,
370 &dev_attr_product_number.attr,
371 &dev_attr_serial_number.attr,
372 &dev_attr_fru_id.attr,
373 &dev_attr_manufacturer.attr,
374 NULL
375};
376
377int amdgpu_fru_sysfs_init(struct amdgpu_device *adev)
378{
379 if (!is_fru_eeprom_supported(adev, NULL) || !adev->fru_info)
380 return 0;
381
382 return sysfs_create_files(&adev->dev->kobj, amdgpu_fru_attributes);
383}
384
385void amdgpu_fru_sysfs_fini(struct amdgpu_device *adev)
386{
387 if (!is_fru_eeprom_supported(adev, NULL) || !adev->fru_info)
388 return;
389
390 sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);
391}