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
is_fru_eeprom_supported(struct amdgpu_device * adev,u32 * fru_addr)35 static 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_pn, "D161",
64 sizeof(atom_ctx->vbios_pn)) ||
65 strnstr(atom_ctx->vbios_pn, "D163",
66 sizeof(atom_ctx->vbios_pn))) {
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_pn, "D673",
76 sizeof(atom_ctx->vbios_pn)))
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_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 default:
96 return false;
97 }
98 }
99
amdgpu_fru_get_product_info(struct amdgpu_device * adev)100 int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
101 {
102 unsigned char buf[8], *pia;
103 u32 addr, fru_addr;
104 int size, len;
105 u8 csum;
106
107 if (!is_fru_eeprom_supported(adev, &fru_addr))
108 return 0;
109
110 /* If algo exists, it means that the i2c_adapter's initialized */
111 if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
112 DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
113 return -ENODEV;
114 }
115
116 /* Read the IPMI Common header */
117 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
118 sizeof(buf));
119 if (len != 8) {
120 DRM_ERROR("Couldn't read the IPMI Common Header: %d", len);
121 return len < 0 ? len : -EIO;
122 }
123
124 if (buf[0] != 1) {
125 DRM_ERROR("Bad IPMI Common Header version: 0x%02x", buf[0]);
126 return -EIO;
127 }
128
129 for (csum = 0; len > 0; len--)
130 csum += buf[len - 1];
131 if (csum) {
132 DRM_ERROR("Bad IPMI Common Header checksum: 0x%02x", csum);
133 return -EIO;
134 }
135
136 /* Get the offset to the Product Info Area (PIA). */
137 addr = buf[4] * 8;
138 if (!addr)
139 return 0;
140
141 /* Get the absolute address to the PIA. */
142 addr += fru_addr;
143
144 /* Read the header of the PIA. */
145 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
146 if (len != 3) {
147 DRM_ERROR("Couldn't read the Product Info Area header: %d", len);
148 return len < 0 ? len : -EIO;
149 }
150
151 if (buf[0] != 1) {
152 DRM_ERROR("Bad IPMI Product Info Area version: 0x%02x", buf[0]);
153 return -EIO;
154 }
155
156 size = buf[1] * 8;
157 pia = kzalloc(size, GFP_KERNEL);
158 if (!pia)
159 return -ENOMEM;
160
161 /* Read the whole PIA. */
162 len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
163 if (len != size) {
164 kfree(pia);
165 DRM_ERROR("Couldn't read the Product Info Area: %d", len);
166 return len < 0 ? len : -EIO;
167 }
168
169 for (csum = 0; size > 0; size--)
170 csum += pia[size - 1];
171 if (csum) {
172 DRM_ERROR("Bad Product Info Area checksum: 0x%02x", csum);
173 kfree(pia);
174 return -EIO;
175 }
176
177 /* Now extract useful information from the PIA.
178 *
179 * Skip the Manufacturer Name at [3] and go directly to
180 * the Product Name field.
181 */
182 addr = 3 + 1 + (pia[3] & 0x3F);
183 if (addr + 1 >= len)
184 goto Out;
185 memcpy(adev->product_name, pia + addr + 1,
186 min_t(size_t,
187 sizeof(adev->product_name),
188 pia[addr] & 0x3F));
189 adev->product_name[sizeof(adev->product_name) - 1] = '\0';
190
191 /* Go to the Product Part/Model Number field. */
192 addr += 1 + (pia[addr] & 0x3F);
193 if (addr + 1 >= len)
194 goto Out;
195 memcpy(adev->product_number, pia + addr + 1,
196 min_t(size_t,
197 sizeof(adev->product_number),
198 pia[addr] & 0x3F));
199 adev->product_number[sizeof(adev->product_number) - 1] = '\0';
200
201 /* Go to the Product Version field. */
202 addr += 1 + (pia[addr] & 0x3F);
203
204 /* Go to the Product Serial Number field. */
205 addr += 1 + (pia[addr] & 0x3F);
206 if (addr + 1 >= len)
207 goto Out;
208 memcpy(adev->serial, pia + addr + 1, min_t(size_t,
209 sizeof(adev->serial),
210 pia[addr] & 0x3F));
211 adev->serial[sizeof(adev->serial) - 1] = '\0';
212 Out:
213 kfree(pia);
214 return 0;
215 }
216
217 /**
218 * DOC: product_name
219 *
220 * The amdgpu driver provides a sysfs API for reporting the product name
221 * for the device
222 * The file product_name is used for this and returns the product name
223 * as returned from the FRU.
224 * NOTE: This is only available for certain server cards
225 */
226
amdgpu_fru_product_name_show(struct device * dev,struct device_attribute * attr,char * buf)227 static ssize_t amdgpu_fru_product_name_show(struct device *dev,
228 struct device_attribute *attr,
229 char *buf)
230 {
231 struct drm_device *ddev = dev_get_drvdata(dev);
232 struct amdgpu_device *adev = drm_to_adev(ddev);
233
234 return sysfs_emit(buf, "%s\n", adev->product_name);
235 }
236
237 static DEVICE_ATTR(product_name, 0444, amdgpu_fru_product_name_show, NULL);
238
239 /**
240 * DOC: product_number
241 *
242 * The amdgpu driver provides a sysfs API for reporting the part number
243 * for the device
244 * The file product_number is used for this and returns the part number
245 * as returned from the FRU.
246 * NOTE: This is only available for certain server cards
247 */
248
amdgpu_fru_product_number_show(struct device * dev,struct device_attribute * attr,char * buf)249 static ssize_t amdgpu_fru_product_number_show(struct device *dev,
250 struct device_attribute *attr,
251 char *buf)
252 {
253 struct drm_device *ddev = dev_get_drvdata(dev);
254 struct amdgpu_device *adev = drm_to_adev(ddev);
255
256 return sysfs_emit(buf, "%s\n", adev->product_number);
257 }
258
259 static DEVICE_ATTR(product_number, 0444, amdgpu_fru_product_number_show, NULL);
260
261 /**
262 * DOC: serial_number
263 *
264 * The amdgpu driver provides a sysfs API for reporting the serial number
265 * for the device
266 * The file serial_number is used for this and returns the serial number
267 * as returned from the FRU.
268 * NOTE: This is only available for certain server cards
269 */
270
amdgpu_fru_serial_number_show(struct device * dev,struct device_attribute * attr,char * buf)271 static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
272 struct device_attribute *attr,
273 char *buf)
274 {
275 struct drm_device *ddev = dev_get_drvdata(dev);
276 struct amdgpu_device *adev = drm_to_adev(ddev);
277
278 return sysfs_emit(buf, "%s\n", adev->serial);
279 }
280
281 static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);
282
283 static const struct attribute *amdgpu_fru_attributes[] = {
284 &dev_attr_product_name.attr,
285 &dev_attr_product_number.attr,
286 &dev_attr_serial_number.attr,
287 NULL
288 };
289
amdgpu_fru_sysfs_init(struct amdgpu_device * adev)290 int amdgpu_fru_sysfs_init(struct amdgpu_device *adev)
291 {
292 if (!is_fru_eeprom_supported(adev, NULL))
293 return 0;
294
295 return sysfs_create_files(&adev->dev->kobj, amdgpu_fru_attributes);
296 }
297
amdgpu_fru_sysfs_fini(struct amdgpu_device * adev)298 void amdgpu_fru_sysfs_fini(struct amdgpu_device *adev)
299 {
300 if (!is_fru_eeprom_supported(adev, NULL))
301 return;
302
303 sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);
304 }
305