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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#define FRU_EEPROM_MADDR_INV 0xFFFFF
35
36static bool is_fru_eeprom_supported(struct amdgpu_device *adev, u32 *fru_addr)
37{
38 /* Only server cards have the FRU EEPROM
39 * TODO: See if we can figure this out dynamically instead of
40 * having to parse VBIOS versions.
41 */
42 struct atom_context *atom_ctx = adev->mode_info.atom_context;
43
44 /* The i2c access is blocked on VF
45 * TODO: Need other way to get the info
46 * Also, FRU not valid for APU devices.
47 */
48 if (amdgpu_sriov_vf(adev) || (adev->flags & AMD_IS_APU))
49 return false;
50
51 /* The default I2C EEPROM address of the FRU.
52 */
53 if (fru_addr)
54 *fru_addr = FRU_EEPROM_MADDR_8;
55
56 /* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
57 * we can use just the "DXXX" portion. If there were more models, we
58 * could convert the 3 characters to a hex integer and use a switch
59 * for ease/speed/readability. For now, 2 string comparisons are
60 * reasonable and not too expensive
61 */
62 switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
63 case IP_VERSION(11, 0, 2):
64 switch (adev->asic_type) {
65 case CHIP_VEGA20:
66 /* D161 and D163 are the VG20 server SKUs */
67 if (atom_ctx && (strnstr(atom_ctx->vbios_pn, "D161",
68 sizeof(atom_ctx->vbios_pn)) ||
69 strnstr(atom_ctx->vbios_pn, "D163",
70 sizeof(atom_ctx->vbios_pn)))) {
71 if (fru_addr)
72 *fru_addr = FRU_EEPROM_MADDR_6;
73 return true;
74 } else {
75 return false;
76 }
77 case CHIP_ARCTURUS:
78 default:
79 return false;
80 }
81 case IP_VERSION(11, 0, 7):
82 if (atom_ctx && strnstr(atom_ctx->vbios_pn, "D603",
83 sizeof(atom_ctx->vbios_pn))) {
84 if (strnstr(atom_ctx->vbios_pn, "D603GLXE",
85 sizeof(atom_ctx->vbios_pn))) {
86 return false;
87 }
88
89 if (fru_addr)
90 *fru_addr = FRU_EEPROM_MADDR_6;
91 return true;
92
93 } else {
94 return false;
95 }
96 case IP_VERSION(13, 0, 2):
97 /* All Aldebaran SKUs have an FRU */
98 if (atom_ctx && !strnstr(atom_ctx->vbios_pn, "D673",
99 sizeof(atom_ctx->vbios_pn)))
100 if (fru_addr)
101 *fru_addr = FRU_EEPROM_MADDR_6;
102 return true;
103 case IP_VERSION(13, 0, 6):
104 case IP_VERSION(13, 0, 14):
105 if (fru_addr)
106 *fru_addr = FRU_EEPROM_MADDR_8;
107 return true;
108 case IP_VERSION(13, 0, 12):
109 case IP_VERSION(15, 0, 8):
110 if (fru_addr)
111 *fru_addr = FRU_EEPROM_MADDR_INV;
112 return true;
113 default:
114 return false;
115 }
116}
117
118/*
119 * IPMI FRU Product Info Area fields are TLV: one type/length byte
120 * (low 6 bits = data length) followed by that many data bytes. These
121 * helpers walk the cursor and copy a single field while bounding all
122 * accesses to the actual buffer length read from the EEPROM.
123 */
124#define FRU_FIELD_LEN(p, a) ((p)[a] & 0x3F)
125
126/* Advance cursor past the current TLV. Returns false if no more data. */
127static bool fru_pia_advance(u32 *addr, const unsigned char *pia, int len)
128{
129 if (*addr >= (u32)len)
130 return false;
131 *addr += 1 + FRU_FIELD_LEN(pia, *addr);
132 return true;
133}
134
135/*
136 * Copy the current TLV's data into dst (NUL-terminated). Returns false if
137 * the TLV header or data would read past the end of pia.
138 */
139static bool fru_pia_copy_field(char *dst, size_t dst_size,
140 const unsigned char *pia, u32 addr, int len)
141{
142 size_t fl;
143
144 if (addr + 1 >= (u32)len)
145 return false;
146
147 fl = min3((size_t)FRU_FIELD_LEN(pia, addr),
148 dst_size - 1,
149 (size_t)(len - addr - 1));
150 memcpy(dst, pia + addr + 1, fl);
151 dst[fl] = '\0';
152 return true;
153}
154
155int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
156{
157 struct amdgpu_fru_info *fru_info;
158 unsigned char buf[8], *pia;
159 u32 addr, fru_addr;
160 int size, len;
161 u8 csum;
162
163 if (!is_fru_eeprom_supported(adev, &fru_addr))
164 return 0;
165
166 /* FRU data avaialble, but no direct EEPROM access */
167 if (fru_addr == FRU_EEPROM_MADDR_INV)
168 return 0;
169
170 if (!adev->fru_info) {
171 adev->fru_info = kzalloc_obj(*adev->fru_info);
172 if (!adev->fru_info)
173 return -ENOMEM;
174 }
175
176 fru_info = adev->fru_info;
177 /* For Arcturus-and-later, default value of serial_number is unique_id
178 * so convert it to a 16-digit HEX string for convenience and
179 * backwards-compatibility.
180 */
181 sprintf(fru_info->serial, "%llx", adev->unique_id);
182
183 /* If algo exists, it means that the i2c_adapter's initialized */
184 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
185 dev_warn(adev->dev,
186 "Cannot access FRU, EEPROM accessor not initialized");
187 return -ENODEV;
188 }
189
190 /* Read the IPMI Common header */
191 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
192 sizeof(buf));
193 if (len != 8) {
194 dev_err(adev->dev, "Couldn't read the IPMI Common Header: %d",
195 len);
196 return len < 0 ? len : -EIO;
197 }
198
199 if (buf[0] != 1) {
200 dev_err(adev->dev, "Bad IPMI Common Header version: 0x%02x",
201 buf[0]);
202 return -EIO;
203 }
204
205 for (csum = 0; len > 0; len--)
206 csum += buf[len - 1];
207 if (csum) {
208 dev_err(adev->dev, "Bad IPMI Common Header checksum: 0x%02x",
209 csum);
210 return -EIO;
211 }
212
213 /* Get the offset to the Product Info Area (PIA). */
214 addr = buf[4] * 8;
215 if (!addr)
216 return 0;
217
218 /* Get the absolute address to the PIA. */
219 addr += fru_addr;
220
221 /* Read the header of the PIA. */
222 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
223 if (len != 3) {
224 dev_err(adev->dev,
225 "Couldn't read the Product Info Area header: %d", len);
226 return len < 0 ? len : -EIO;
227 }
228
229 if (buf[0] != 1) {
230 dev_err(adev->dev, "Bad IPMI Product Info Area version: 0x%02x",
231 buf[0]);
232 return -EIO;
233 }
234
235 size = buf[1] * 8;
236 pia = kzalloc(size, GFP_KERNEL);
237 if (!pia)
238 return -ENOMEM;
239
240 /* Read the whole PIA. */
241 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
242 if (len != size) {
243 kfree(pia);
244 dev_err(adev->dev, "Couldn't read the Product Info Area: %d",
245 len);
246 return len < 0 ? len : -EIO;
247 }
248
249 for (csum = 0; size > 0; size--)
250 csum += pia[size - 1];
251 if (csum) {
252 dev_err(adev->dev, "Bad Product Info Area checksum: 0x%02x",
253 csum);
254 kfree(pia);
255 return -EIO;
256 }
257
258 /* Now extract useful information from the PIA.
259 *
260 * Read Manufacturer Name field whose length is [3].
261 */
262 addr = 3;
263 if (!fru_pia_copy_field(fru_info->manufacturer_name,
264 sizeof(fru_info->manufacturer_name),
265 pia, addr, len))
266 goto Out;
267
268 /* Read Product Name field. */
269 if (!fru_pia_advance(&addr, pia, len) ||
270 !fru_pia_copy_field(fru_info->product_name,
271 sizeof(fru_info->product_name),
272 pia, addr, len))
273 goto Out;
274
275 /* Go to the Product Part/Model Number field. */
276 if (!fru_pia_advance(&addr, pia, len) ||
277 !fru_pia_copy_field(fru_info->product_number,
278 sizeof(fru_info->product_number),
279 pia, addr, len))
280 goto Out;
281
282 /* Skip the Product Version field. */
283 if (!fru_pia_advance(&addr, pia, len))
284 goto Out;
285
286 /* Read the Product Serial Number field. */
287 if (!fru_pia_advance(&addr, pia, len) ||
288 !fru_pia_copy_field(fru_info->serial,
289 sizeof(fru_info->serial),
290 pia, addr, len))
291 goto Out;
292
293 /* Skip the Asset Tag field. */
294 if (!fru_pia_advance(&addr, pia, len))
295 goto Out;
296
297 /* FRU File Id field. This could be 'null'. */
298 if (!fru_pia_advance(&addr, pia, len) ||
299 !fru_pia_copy_field(fru_info->fru_id,
300 sizeof(fru_info->fru_id),
301 pia, addr, len))
302 goto Out;
303
304Out:
305 kfree(pia);
306 return 0;
307}
308
309/**
310 * DOC: product_name
311 *
312 * The amdgpu driver provides a sysfs API for reporting the product name
313 * for the device
314 * The file product_name is used for this and returns the product name
315 * as returned from the FRU.
316 * NOTE: This is only available for certain server cards
317 */
318
319static ssize_t amdgpu_fru_product_name_show(struct device *dev,
320 struct device_attribute *attr,
321 char *buf)
322{
323 struct drm_device *ddev = dev_get_drvdata(dev);
324 struct amdgpu_device *adev = drm_to_adev(ddev);
325
326 return sysfs_emit(buf, "%s\n", adev->fru_info->product_name);
327}
328
329static DEVICE_ATTR(product_name, 0444, amdgpu_fru_product_name_show, NULL);
330
331/**
332 * DOC: product_number
333 *
334 * The amdgpu driver provides a sysfs API for reporting the part number
335 * for the device
336 * The file product_number is used for this and returns the part number
337 * as returned from the FRU.
338 * NOTE: This is only available for certain server cards
339 */
340
341static ssize_t amdgpu_fru_product_number_show(struct device *dev,
342 struct device_attribute *attr,
343 char *buf)
344{
345 struct drm_device *ddev = dev_get_drvdata(dev);
346 struct amdgpu_device *adev = drm_to_adev(ddev);
347
348 return sysfs_emit(buf, "%s\n", adev->fru_info->product_number);
349}
350
351static DEVICE_ATTR(product_number, 0444, amdgpu_fru_product_number_show, NULL);
352
353/**
354 * DOC: serial_number
355 *
356 * The amdgpu driver provides a sysfs API for reporting the serial number
357 * for the device
358 * The file serial_number is used for this and returns the serial number
359 * as returned from the FRU.
360 * NOTE: This is only available for certain server cards
361 */
362
363static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
364 struct device_attribute *attr,
365 char *buf)
366{
367 struct drm_device *ddev = dev_get_drvdata(dev);
368 struct amdgpu_device *adev = drm_to_adev(ddev);
369
370 return sysfs_emit(buf, "%s\n", adev->fru_info->serial);
371}
372
373static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);
374
375/**
376 * DOC: fru_id
377 *
378 * The amdgpu driver provides a sysfs API for reporting FRU File Id
379 * for the device.
380 * The file fru_id is used for this and returns the File Id value
381 * as returned from the FRU.
382 * NOTE: This is only available for certain server cards
383 */
384
385static ssize_t amdgpu_fru_id_show(struct device *dev,
386 struct device_attribute *attr, char *buf)
387{
388 struct drm_device *ddev = dev_get_drvdata(dev);
389 struct amdgpu_device *adev = drm_to_adev(ddev);
390
391 return sysfs_emit(buf, "%s\n", adev->fru_info->fru_id);
392}
393
394static DEVICE_ATTR(fru_id, 0444, amdgpu_fru_id_show, NULL);
395
396/**
397 * DOC: manufacturer
398 *
399 * The amdgpu driver provides a sysfs API for reporting manufacturer name from
400 * FRU information.
401 * The file manufacturer returns the value as returned from the FRU.
402 * NOTE: This is only available for certain server cards
403 */
404
405static ssize_t amdgpu_fru_manufacturer_name_show(struct device *dev,
406 struct device_attribute *attr,
407 char *buf)
408{
409 struct drm_device *ddev = dev_get_drvdata(dev);
410 struct amdgpu_device *adev = drm_to_adev(ddev);
411
412 return sysfs_emit(buf, "%s\n", adev->fru_info->manufacturer_name);
413}
414
415static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL);
416
417static const struct attribute *amdgpu_fru_attributes[] = {
418 &dev_attr_product_name.attr,
419 &dev_attr_product_number.attr,
420 &dev_attr_serial_number.attr,
421 &dev_attr_fru_id.attr,
422 &dev_attr_manufacturer.attr,
423 NULL
424};
425
426int amdgpu_fru_sysfs_init(struct amdgpu_device *adev)
427{
428 if (!is_fru_eeprom_supported(adev, NULL) || !adev->fru_info)
429 return 0;
430
431 return sysfs_create_files(&adev->dev->kobj, amdgpu_fru_attributes);
432}
433
434void amdgpu_fru_sysfs_fini(struct amdgpu_device *adev)
435{
436 if (!adev->fru_info)
437 return;
438
439 sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);
440}