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 36 static 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. */ 127 static 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 */ 139 static 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 } 154 155 int 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; 303 304 Out: 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 */ 318 319 static 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 } 328 329 static 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 */ 340 341 static 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 } 350 351 static 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 */ 362 363 static 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 } 372 373 static 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 */ 384 385 static 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 } 393 394 static 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 */ 404 405 static 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 } 414 415 static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL); 416 417 static 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 }; 425 426 int 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 } 433 434 void 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 } 441