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 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 * 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 } 111 112 int 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'; 254 255 Out: 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 */ 269 270 static 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 } 279 280 static 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 */ 291 292 static 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 } 301 302 static 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 */ 313 314 static 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 } 323 324 static 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 */ 335 336 static 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 } 344 345 static 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 */ 355 356 static 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 } 365 366 static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL); 367 368 static 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 }; 376 377 int 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 } 384 385 void 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 } 392