1 /* 2 * Intel E3-1200 3 * Copyright (C) 2014 Jason Baron <jbaron@akamai.com> 4 * 5 * Support for the E3-1200 processor family. Heavily based on previous 6 * Intel EDAC drivers. 7 * 8 * Since the DRAM controller is on the cpu chip, we can use its PCI device 9 * id to identify these processors. 10 * 11 * PCI DRAM controller device ids (Taken from The PCI ID Repository - http://pci-ids.ucw.cz/) 12 * 13 * 0108: Xeon E3-1200 Processor Family DRAM Controller 14 * 010c: Xeon E3-1200/2nd Generation Core Processor Family DRAM Controller 15 * 0150: Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller 16 * 0158: Xeon E3-1200 v2/Ivy Bridge DRAM Controller 17 * 015c: Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller 18 * 0c04: Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller 19 * 0c08: Xeon E3-1200 v3 Processor DRAM Controller 20 * 1918: Xeon E3-1200 v5 Skylake Host Bridge/DRAM Registers 21 * 22 * Based on Intel specification: 23 * http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e3-1200v3-vol-2-datasheet.pdf 24 * http://www.intel.com/content/www/us/en/processors/xeon/xeon-e3-1200-family-vol-2-datasheet.html 25 * 26 * According to the above datasheet (p.16): 27 * " 28 * 6. Software must not access B0/D0/F0 32-bit memory-mapped registers with 29 * requests that cross a DW boundary. 30 * " 31 * 32 * Thus, we make use of the explicit: lo_hi_readq(), which breaks the readq into 33 * 2 readl() calls. This restriction may be lifted in subsequent chip releases, 34 * but lo_hi_readq() ensures that we are safe across all e3-1200 processors. 35 */ 36 37 #include <linux/module.h> 38 #include <linux/init.h> 39 #include <linux/pci.h> 40 #include <linux/pci_ids.h> 41 #include <linux/edac.h> 42 43 #include <linux/io-64-nonatomic-lo-hi.h> 44 #include "edac_core.h" 45 46 #define IE31200_REVISION "1.0" 47 #define EDAC_MOD_STR "ie31200_edac" 48 49 #define ie31200_printk(level, fmt, arg...) \ 50 edac_printk(level, "ie31200", fmt, ##arg) 51 52 #define PCI_DEVICE_ID_INTEL_IE31200_HB_1 0x0108 53 #define PCI_DEVICE_ID_INTEL_IE31200_HB_2 0x010c 54 #define PCI_DEVICE_ID_INTEL_IE31200_HB_3 0x0150 55 #define PCI_DEVICE_ID_INTEL_IE31200_HB_4 0x0158 56 #define PCI_DEVICE_ID_INTEL_IE31200_HB_5 0x015c 57 #define PCI_DEVICE_ID_INTEL_IE31200_HB_6 0x0c04 58 #define PCI_DEVICE_ID_INTEL_IE31200_HB_7 0x0c08 59 #define PCI_DEVICE_ID_INTEL_IE31200_HB_8 0x1918 60 61 #define IE31200_DIMMS 4 62 #define IE31200_RANKS 8 63 #define IE31200_RANKS_PER_CHANNEL 4 64 #define IE31200_DIMMS_PER_CHANNEL 2 65 #define IE31200_CHANNELS 2 66 67 /* Intel IE31200 register addresses - device 0 function 0 - DRAM Controller */ 68 #define IE31200_MCHBAR_LOW 0x48 69 #define IE31200_MCHBAR_HIGH 0x4c 70 #define IE31200_MCHBAR_MASK GENMASK_ULL(38, 15) 71 #define IE31200_MMR_WINDOW_SIZE BIT(15) 72 73 /* 74 * Error Status Register (16b) 75 * 76 * 15 reserved 77 * 14 Isochronous TBWRR Run Behind FIFO Full 78 * (ITCV) 79 * 13 Isochronous TBWRR Run Behind FIFO Put 80 * (ITSTV) 81 * 12 reserved 82 * 11 MCH Thermal Sensor Event 83 * for SMI/SCI/SERR (GTSE) 84 * 10 reserved 85 * 9 LOCK to non-DRAM Memory Flag (LCKF) 86 * 8 reserved 87 * 7 DRAM Throttle Flag (DTF) 88 * 6:2 reserved 89 * 1 Multi-bit DRAM ECC Error Flag (DMERR) 90 * 0 Single-bit DRAM ECC Error Flag (DSERR) 91 */ 92 #define IE31200_ERRSTS 0xc8 93 #define IE31200_ERRSTS_UE BIT(1) 94 #define IE31200_ERRSTS_CE BIT(0) 95 #define IE31200_ERRSTS_BITS (IE31200_ERRSTS_UE | IE31200_ERRSTS_CE) 96 97 /* 98 * Channel 0 ECC Error Log (64b) 99 * 100 * 63:48 Error Column Address (ERRCOL) 101 * 47:32 Error Row Address (ERRROW) 102 * 31:29 Error Bank Address (ERRBANK) 103 * 28:27 Error Rank Address (ERRRANK) 104 * 26:24 reserved 105 * 23:16 Error Syndrome (ERRSYND) 106 * 15: 2 reserved 107 * 1 Multiple Bit Error Status (MERRSTS) 108 * 0 Correctable Error Status (CERRSTS) 109 */ 110 111 #define IE31200_C0ECCERRLOG 0x40c8 112 #define IE31200_C1ECCERRLOG 0x44c8 113 #define IE31200_C0ECCERRLOG_SKL 0x4048 114 #define IE31200_C1ECCERRLOG_SKL 0x4448 115 #define IE31200_ECCERRLOG_CE BIT(0) 116 #define IE31200_ECCERRLOG_UE BIT(1) 117 #define IE31200_ECCERRLOG_RANK_BITS GENMASK_ULL(28, 27) 118 #define IE31200_ECCERRLOG_RANK_SHIFT 27 119 #define IE31200_ECCERRLOG_SYNDROME_BITS GENMASK_ULL(23, 16) 120 #define IE31200_ECCERRLOG_SYNDROME_SHIFT 16 121 122 #define IE31200_ECCERRLOG_SYNDROME(log) \ 123 ((log & IE31200_ECCERRLOG_SYNDROME_BITS) >> \ 124 IE31200_ECCERRLOG_SYNDROME_SHIFT) 125 126 #define IE31200_CAPID0 0xe4 127 #define IE31200_CAPID0_PDCD BIT(4) 128 #define IE31200_CAPID0_DDPCD BIT(6) 129 #define IE31200_CAPID0_ECC BIT(1) 130 131 #define IE31200_MAD_DIMM_0_OFFSET 0x5004 132 #define IE31200_MAD_DIMM_0_OFFSET_SKL 0x500C 133 #define IE31200_MAD_DIMM_SIZE GENMASK_ULL(7, 0) 134 #define IE31200_MAD_DIMM_A_RANK BIT(17) 135 #define IE31200_MAD_DIMM_A_RANK_SHIFT 17 136 #define IE31200_MAD_DIMM_A_RANK_SKL BIT(10) 137 #define IE31200_MAD_DIMM_A_RANK_SKL_SHIFT 10 138 #define IE31200_MAD_DIMM_A_WIDTH BIT(19) 139 #define IE31200_MAD_DIMM_A_WIDTH_SHIFT 19 140 #define IE31200_MAD_DIMM_A_WIDTH_SKL GENMASK_ULL(9, 8) 141 #define IE31200_MAD_DIMM_A_WIDTH_SKL_SHIFT 8 142 143 /* Skylake reports 1GB increments, everything else is 256MB */ 144 #define IE31200_PAGES(n, skl) \ 145 (n << (28 + (2 * skl) - PAGE_SHIFT)) 146 147 static int nr_channels; 148 149 struct ie31200_priv { 150 void __iomem *window; 151 void __iomem *c0errlog; 152 void __iomem *c1errlog; 153 }; 154 155 enum ie31200_chips { 156 IE31200 = 0, 157 }; 158 159 struct ie31200_dev_info { 160 const char *ctl_name; 161 }; 162 163 struct ie31200_error_info { 164 u16 errsts; 165 u16 errsts2; 166 u64 eccerrlog[IE31200_CHANNELS]; 167 }; 168 169 static const struct ie31200_dev_info ie31200_devs[] = { 170 [IE31200] = { 171 .ctl_name = "IE31200" 172 }, 173 }; 174 175 struct dimm_data { 176 u8 size; /* in multiples of 256MB, except Skylake is 1GB */ 177 u8 dual_rank : 1, 178 x16_width : 2; /* 0 means x8 width */ 179 }; 180 181 static int how_many_channels(struct pci_dev *pdev) 182 { 183 int n_channels; 184 unsigned char capid0_2b; /* 2nd byte of CAPID0 */ 185 186 pci_read_config_byte(pdev, IE31200_CAPID0 + 1, &capid0_2b); 187 188 /* check PDCD: Dual Channel Disable */ 189 if (capid0_2b & IE31200_CAPID0_PDCD) { 190 edac_dbg(0, "In single channel mode\n"); 191 n_channels = 1; 192 } else { 193 edac_dbg(0, "In dual channel mode\n"); 194 n_channels = 2; 195 } 196 197 /* check DDPCD - check if both channels are filled */ 198 if (capid0_2b & IE31200_CAPID0_DDPCD) 199 edac_dbg(0, "2 DIMMS per channel disabled\n"); 200 else 201 edac_dbg(0, "2 DIMMS per channel enabled\n"); 202 203 return n_channels; 204 } 205 206 static bool ecc_capable(struct pci_dev *pdev) 207 { 208 unsigned char capid0_4b; /* 4th byte of CAPID0 */ 209 210 pci_read_config_byte(pdev, IE31200_CAPID0 + 3, &capid0_4b); 211 if (capid0_4b & IE31200_CAPID0_ECC) 212 return false; 213 return true; 214 } 215 216 static int eccerrlog_row(u64 log) 217 { 218 return ((log & IE31200_ECCERRLOG_RANK_BITS) >> 219 IE31200_ECCERRLOG_RANK_SHIFT); 220 } 221 222 static void ie31200_clear_error_info(struct mem_ctl_info *mci) 223 { 224 /* 225 * Clear any error bits. 226 * (Yes, we really clear bits by writing 1 to them.) 227 */ 228 pci_write_bits16(to_pci_dev(mci->pdev), IE31200_ERRSTS, 229 IE31200_ERRSTS_BITS, IE31200_ERRSTS_BITS); 230 } 231 232 static void ie31200_get_and_clear_error_info(struct mem_ctl_info *mci, 233 struct ie31200_error_info *info) 234 { 235 struct pci_dev *pdev; 236 struct ie31200_priv *priv = mci->pvt_info; 237 238 pdev = to_pci_dev(mci->pdev); 239 240 /* 241 * This is a mess because there is no atomic way to read all the 242 * registers at once and the registers can transition from CE being 243 * overwritten by UE. 244 */ 245 pci_read_config_word(pdev, IE31200_ERRSTS, &info->errsts); 246 if (!(info->errsts & IE31200_ERRSTS_BITS)) 247 return; 248 249 info->eccerrlog[0] = lo_hi_readq(priv->c0errlog); 250 if (nr_channels == 2) 251 info->eccerrlog[1] = lo_hi_readq(priv->c1errlog); 252 253 pci_read_config_word(pdev, IE31200_ERRSTS, &info->errsts2); 254 255 /* 256 * If the error is the same for both reads then the first set 257 * of reads is valid. If there is a change then there is a CE 258 * with no info and the second set of reads is valid and 259 * should be UE info. 260 */ 261 if ((info->errsts ^ info->errsts2) & IE31200_ERRSTS_BITS) { 262 info->eccerrlog[0] = lo_hi_readq(priv->c0errlog); 263 if (nr_channels == 2) 264 info->eccerrlog[1] = 265 lo_hi_readq(priv->c1errlog); 266 } 267 268 ie31200_clear_error_info(mci); 269 } 270 271 static void ie31200_process_error_info(struct mem_ctl_info *mci, 272 struct ie31200_error_info *info) 273 { 274 int channel; 275 u64 log; 276 277 if (!(info->errsts & IE31200_ERRSTS_BITS)) 278 return; 279 280 if ((info->errsts ^ info->errsts2) & IE31200_ERRSTS_BITS) { 281 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0, 282 -1, -1, -1, "UE overwrote CE", ""); 283 info->errsts = info->errsts2; 284 } 285 286 for (channel = 0; channel < nr_channels; channel++) { 287 log = info->eccerrlog[channel]; 288 if (log & IE31200_ECCERRLOG_UE) { 289 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 290 0, 0, 0, 291 eccerrlog_row(log), 292 channel, -1, 293 "ie31200 UE", ""); 294 } else if (log & IE31200_ECCERRLOG_CE) { 295 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 296 0, 0, 297 IE31200_ECCERRLOG_SYNDROME(log), 298 eccerrlog_row(log), 299 channel, -1, 300 "ie31200 CE", ""); 301 } 302 } 303 } 304 305 static void ie31200_check(struct mem_ctl_info *mci) 306 { 307 struct ie31200_error_info info; 308 309 edac_dbg(1, "MC%d\n", mci->mc_idx); 310 ie31200_get_and_clear_error_info(mci, &info); 311 ie31200_process_error_info(mci, &info); 312 } 313 314 static void __iomem *ie31200_map_mchbar(struct pci_dev *pdev) 315 { 316 union { 317 u64 mchbar; 318 struct { 319 u32 mchbar_low; 320 u32 mchbar_high; 321 }; 322 } u; 323 void __iomem *window; 324 325 pci_read_config_dword(pdev, IE31200_MCHBAR_LOW, &u.mchbar_low); 326 pci_read_config_dword(pdev, IE31200_MCHBAR_HIGH, &u.mchbar_high); 327 u.mchbar &= IE31200_MCHBAR_MASK; 328 329 if (u.mchbar != (resource_size_t)u.mchbar) { 330 ie31200_printk(KERN_ERR, "mmio space beyond accessible range (0x%llx)\n", 331 (unsigned long long)u.mchbar); 332 return NULL; 333 } 334 335 window = ioremap_nocache(u.mchbar, IE31200_MMR_WINDOW_SIZE); 336 if (!window) 337 ie31200_printk(KERN_ERR, "Cannot map mmio space at 0x%llx\n", 338 (unsigned long long)u.mchbar); 339 340 return window; 341 } 342 343 static void __skl_populate_dimm_info(struct dimm_data *dd, u32 addr_decode, 344 int chan) 345 { 346 dd->size = (addr_decode >> (chan << 4)) & IE31200_MAD_DIMM_SIZE; 347 dd->dual_rank = (addr_decode & (IE31200_MAD_DIMM_A_RANK_SKL << (chan << 4))) ? 1 : 0; 348 dd->x16_width = ((addr_decode & (IE31200_MAD_DIMM_A_WIDTH_SKL << (chan << 4))) >> 349 (IE31200_MAD_DIMM_A_WIDTH_SKL_SHIFT + (chan << 4))); 350 } 351 352 static void __populate_dimm_info(struct dimm_data *dd, u32 addr_decode, 353 int chan) 354 { 355 dd->size = (addr_decode >> (chan << 3)) & IE31200_MAD_DIMM_SIZE; 356 dd->dual_rank = (addr_decode & (IE31200_MAD_DIMM_A_RANK << chan)) ? 1 : 0; 357 dd->x16_width = (addr_decode & (IE31200_MAD_DIMM_A_WIDTH << chan)) ? 1 : 0; 358 } 359 360 static void populate_dimm_info(struct dimm_data *dd, u32 addr_decode, int chan, 361 bool skl) 362 { 363 if (skl) 364 __skl_populate_dimm_info(dd, addr_decode, chan); 365 else 366 __populate_dimm_info(dd, addr_decode, chan); 367 } 368 369 370 static int ie31200_probe1(struct pci_dev *pdev, int dev_idx) 371 { 372 int i, j, ret; 373 struct mem_ctl_info *mci = NULL; 374 struct edac_mc_layer layers[2]; 375 struct dimm_data dimm_info[IE31200_CHANNELS][IE31200_DIMMS_PER_CHANNEL]; 376 void __iomem *window; 377 struct ie31200_priv *priv; 378 u32 addr_decode, mad_offset; 379 bool skl = (pdev->device == PCI_DEVICE_ID_INTEL_IE31200_HB_8); 380 381 edac_dbg(0, "MC:\n"); 382 383 if (!ecc_capable(pdev)) { 384 ie31200_printk(KERN_INFO, "No ECC support\n"); 385 return -ENODEV; 386 } 387 388 nr_channels = how_many_channels(pdev); 389 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; 390 layers[0].size = IE31200_DIMMS; 391 layers[0].is_virt_csrow = true; 392 layers[1].type = EDAC_MC_LAYER_CHANNEL; 393 layers[1].size = nr_channels; 394 layers[1].is_virt_csrow = false; 395 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, 396 sizeof(struct ie31200_priv)); 397 if (!mci) 398 return -ENOMEM; 399 400 window = ie31200_map_mchbar(pdev); 401 if (!window) { 402 ret = -ENODEV; 403 goto fail_free; 404 } 405 406 edac_dbg(3, "MC: init mci\n"); 407 mci->pdev = &pdev->dev; 408 if (skl) 409 mci->mtype_cap = MEM_FLAG_DDR4; 410 else 411 mci->mtype_cap = MEM_FLAG_DDR3; 412 mci->edac_ctl_cap = EDAC_FLAG_SECDED; 413 mci->edac_cap = EDAC_FLAG_SECDED; 414 mci->mod_name = EDAC_MOD_STR; 415 mci->mod_ver = IE31200_REVISION; 416 mci->ctl_name = ie31200_devs[dev_idx].ctl_name; 417 mci->dev_name = pci_name(pdev); 418 mci->edac_check = ie31200_check; 419 mci->ctl_page_to_phys = NULL; 420 priv = mci->pvt_info; 421 priv->window = window; 422 if (skl) { 423 priv->c0errlog = window + IE31200_C0ECCERRLOG_SKL; 424 priv->c1errlog = window + IE31200_C1ECCERRLOG_SKL; 425 mad_offset = IE31200_MAD_DIMM_0_OFFSET_SKL; 426 } else { 427 priv->c0errlog = window + IE31200_C0ECCERRLOG; 428 priv->c1errlog = window + IE31200_C1ECCERRLOG; 429 mad_offset = IE31200_MAD_DIMM_0_OFFSET; 430 } 431 432 /* populate DIMM info */ 433 for (i = 0; i < IE31200_CHANNELS; i++) { 434 addr_decode = readl(window + mad_offset + 435 (i * 4)); 436 edac_dbg(0, "addr_decode: 0x%x\n", addr_decode); 437 for (j = 0; j < IE31200_DIMMS_PER_CHANNEL; j++) { 438 populate_dimm_info(&dimm_info[i][j], addr_decode, j, 439 skl); 440 edac_dbg(0, "size: 0x%x, rank: %d, width: %d\n", 441 dimm_info[i][j].size, 442 dimm_info[i][j].dual_rank, 443 dimm_info[i][j].x16_width); 444 } 445 } 446 447 /* 448 * The dram rank boundary (DRB) reg values are boundary addresses 449 * for each DRAM rank with a granularity of 64MB. DRB regs are 450 * cumulative; the last one will contain the total memory 451 * contained in all ranks. 452 */ 453 for (i = 0; i < IE31200_DIMMS_PER_CHANNEL; i++) { 454 for (j = 0; j < IE31200_CHANNELS; j++) { 455 struct dimm_info *dimm; 456 unsigned long nr_pages; 457 458 nr_pages = IE31200_PAGES(dimm_info[j][i].size, skl); 459 if (nr_pages == 0) 460 continue; 461 462 if (dimm_info[j][i].dual_rank) { 463 nr_pages = nr_pages / 2; 464 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, 465 mci->n_layers, (i * 2) + 1, 466 j, 0); 467 dimm->nr_pages = nr_pages; 468 edac_dbg(0, "set nr pages: 0x%lx\n", nr_pages); 469 dimm->grain = 8; /* just a guess */ 470 if (skl) 471 dimm->mtype = MEM_DDR4; 472 else 473 dimm->mtype = MEM_DDR3; 474 dimm->dtype = DEV_UNKNOWN; 475 dimm->edac_mode = EDAC_UNKNOWN; 476 } 477 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, 478 mci->n_layers, i * 2, j, 0); 479 dimm->nr_pages = nr_pages; 480 edac_dbg(0, "set nr pages: 0x%lx\n", nr_pages); 481 dimm->grain = 8; /* same guess */ 482 if (skl) 483 dimm->mtype = MEM_DDR4; 484 else 485 dimm->mtype = MEM_DDR3; 486 dimm->dtype = DEV_UNKNOWN; 487 dimm->edac_mode = EDAC_UNKNOWN; 488 } 489 } 490 491 ie31200_clear_error_info(mci); 492 493 if (edac_mc_add_mc(mci)) { 494 edac_dbg(3, "MC: failed edac_mc_add_mc()\n"); 495 ret = -ENODEV; 496 goto fail_unmap; 497 } 498 499 /* get this far and it's successful */ 500 edac_dbg(3, "MC: success\n"); 501 return 0; 502 503 fail_unmap: 504 iounmap(window); 505 506 fail_free: 507 edac_mc_free(mci); 508 509 return ret; 510 } 511 512 static int ie31200_init_one(struct pci_dev *pdev, 513 const struct pci_device_id *ent) 514 { 515 edac_dbg(0, "MC:\n"); 516 517 if (pci_enable_device(pdev) < 0) 518 return -EIO; 519 520 return ie31200_probe1(pdev, ent->driver_data); 521 } 522 523 static void ie31200_remove_one(struct pci_dev *pdev) 524 { 525 struct mem_ctl_info *mci; 526 struct ie31200_priv *priv; 527 528 edac_dbg(0, "\n"); 529 mci = edac_mc_del_mc(&pdev->dev); 530 if (!mci) 531 return; 532 priv = mci->pvt_info; 533 iounmap(priv->window); 534 edac_mc_free(mci); 535 } 536 537 static const struct pci_device_id ie31200_pci_tbl[] = { 538 { 539 PCI_VEND_DEV(INTEL, IE31200_HB_1), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 540 IE31200}, 541 { 542 PCI_VEND_DEV(INTEL, IE31200_HB_2), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 543 IE31200}, 544 { 545 PCI_VEND_DEV(INTEL, IE31200_HB_3), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 546 IE31200}, 547 { 548 PCI_VEND_DEV(INTEL, IE31200_HB_4), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 549 IE31200}, 550 { 551 PCI_VEND_DEV(INTEL, IE31200_HB_5), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 552 IE31200}, 553 { 554 PCI_VEND_DEV(INTEL, IE31200_HB_6), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 555 IE31200}, 556 { 557 PCI_VEND_DEV(INTEL, IE31200_HB_7), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 558 IE31200}, 559 { 560 PCI_VEND_DEV(INTEL, IE31200_HB_8), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 561 IE31200}, 562 { 563 0, 564 } /* 0 terminated list. */ 565 }; 566 MODULE_DEVICE_TABLE(pci, ie31200_pci_tbl); 567 568 static struct pci_driver ie31200_driver = { 569 .name = EDAC_MOD_STR, 570 .probe = ie31200_init_one, 571 .remove = ie31200_remove_one, 572 .id_table = ie31200_pci_tbl, 573 }; 574 575 static int __init ie31200_init(void) 576 { 577 edac_dbg(3, "MC:\n"); 578 /* Ensure that the OPSTATE is set correctly for POLL or NMI */ 579 opstate_init(); 580 581 return pci_register_driver(&ie31200_driver); 582 } 583 584 static void __exit ie31200_exit(void) 585 { 586 edac_dbg(3, "MC:\n"); 587 pci_unregister_driver(&ie31200_driver); 588 } 589 590 module_init(ie31200_init); 591 module_exit(ie31200_exit); 592 593 MODULE_LICENSE("GPL"); 594 MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>"); 595 MODULE_DESCRIPTION("MC support for Intel Processor E31200 memory hub controllers"); 596