1 /* 2 * Intel 82975X Memory Controller kernel module 3 * (C) 2007 aCarLab (India) Pvt. Ltd. (http://acarlab.com) 4 * (C) 2007 jetzbroadband (http://jetzbroadband.com) 5 * This file may be distributed under the terms of the 6 * GNU General Public License. 7 * 8 * Written by Arvind R. 9 * Copied from i82875p_edac.c source: 10 */ 11 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/pci.h> 15 #include <linux/pci_ids.h> 16 #include <linux/edac.h> 17 #include "edac_core.h" 18 19 #define I82975X_REVISION " Ver: 1.0.0" 20 #define EDAC_MOD_STR "i82975x_edac" 21 22 #define i82975x_printk(level, fmt, arg...) \ 23 edac_printk(level, "i82975x", fmt, ##arg) 24 25 #define i82975x_mc_printk(mci, level, fmt, arg...) \ 26 edac_mc_chipset_printk(mci, level, "i82975x", fmt, ##arg) 27 28 #ifndef PCI_DEVICE_ID_INTEL_82975_0 29 #define PCI_DEVICE_ID_INTEL_82975_0 0x277c 30 #endif /* PCI_DEVICE_ID_INTEL_82975_0 */ 31 32 #define I82975X_NR_DIMMS 8 33 #define I82975X_NR_CSROWS(nr_chans) (I82975X_NR_DIMMS / (nr_chans)) 34 35 /* Intel 82975X register addresses - device 0 function 0 - DRAM Controller */ 36 #define I82975X_EAP 0x58 /* Dram Error Address Pointer (32b) 37 * 38 * 31:7 128 byte cache-line address 39 * 6:1 reserved 40 * 0 0: CH0; 1: CH1 41 */ 42 43 #define I82975X_DERRSYN 0x5c /* Dram Error SYNdrome (8b) 44 * 45 * 7:0 DRAM ECC Syndrome 46 */ 47 48 #define I82975X_DES 0x5d /* Dram ERRor DeSTination (8b) 49 * 0h: Processor Memory Reads 50 * 1h:7h reserved 51 * More - See Page 65 of Intel DocSheet. 52 */ 53 54 #define I82975X_ERRSTS 0xc8 /* Error Status Register (16b) 55 * 56 * 15:12 reserved 57 * 11 Thermal Sensor Event 58 * 10 reserved 59 * 9 non-DRAM lock error (ndlock) 60 * 8 Refresh Timeout 61 * 7:2 reserved 62 * 1 ECC UE (multibit DRAM error) 63 * 0 ECC CE (singlebit DRAM error) 64 */ 65 66 /* Error Reporting is supported by 3 mechanisms: 67 1. DMI SERR generation ( ERRCMD ) 68 2. SMI DMI generation ( SMICMD ) 69 3. SCI DMI generation ( SCICMD ) 70 NOTE: Only ONE of the three must be enabled 71 */ 72 #define I82975X_ERRCMD 0xca /* Error Command (16b) 73 * 74 * 15:12 reserved 75 * 11 Thermal Sensor Event 76 * 10 reserved 77 * 9 non-DRAM lock error (ndlock) 78 * 8 Refresh Timeout 79 * 7:2 reserved 80 * 1 ECC UE (multibit DRAM error) 81 * 0 ECC CE (singlebit DRAM error) 82 */ 83 84 #define I82975X_SMICMD 0xcc /* Error Command (16b) 85 * 86 * 15:2 reserved 87 * 1 ECC UE (multibit DRAM error) 88 * 0 ECC CE (singlebit DRAM error) 89 */ 90 91 #define I82975X_SCICMD 0xce /* Error Command (16b) 92 * 93 * 15:2 reserved 94 * 1 ECC UE (multibit DRAM error) 95 * 0 ECC CE (singlebit DRAM error) 96 */ 97 98 #define I82975X_XEAP 0xfc /* Extended Dram Error Address Pointer (8b) 99 * 100 * 7:1 reserved 101 * 0 Bit32 of the Dram Error Address 102 */ 103 104 #define I82975X_MCHBAR 0x44 /* 105 * 106 * 31:14 Base Addr of 16K memory-mapped 107 * configuration space 108 * 13:1 reserverd 109 * 0 mem-mapped config space enable 110 */ 111 112 /* NOTE: Following addresses have to indexed using MCHBAR offset (44h, 32b) */ 113 /* Intel 82975x memory mapped register space */ 114 115 #define I82975X_DRB_SHIFT 25 /* fixed 32MiB grain */ 116 117 #define I82975X_DRB 0x100 /* DRAM Row Boundary (8b x 8) 118 * 119 * 7 set to 1 in highest DRB of 120 * channel if 4GB in ch. 121 * 6:2 upper boundary of rank in 122 * 32MB grains 123 * 1:0 set to 0 124 */ 125 #define I82975X_DRB_CH0R0 0x100 126 #define I82975X_DRB_CH0R1 0x101 127 #define I82975X_DRB_CH0R2 0x102 128 #define I82975X_DRB_CH0R3 0x103 129 #define I82975X_DRB_CH1R0 0x180 130 #define I82975X_DRB_CH1R1 0x181 131 #define I82975X_DRB_CH1R2 0x182 132 #define I82975X_DRB_CH1R3 0x183 133 134 135 #define I82975X_DRA 0x108 /* DRAM Row Attribute (4b x 8) 136 * defines the PAGE SIZE to be used 137 * for the rank 138 * 7 reserved 139 * 6:4 row attr of odd rank, i.e. 1 140 * 3 reserved 141 * 2:0 row attr of even rank, i.e. 0 142 * 143 * 000 = unpopulated 144 * 001 = reserved 145 * 010 = 4KiB 146 * 011 = 8KiB 147 * 100 = 16KiB 148 * others = reserved 149 */ 150 #define I82975X_DRA_CH0R01 0x108 151 #define I82975X_DRA_CH0R23 0x109 152 #define I82975X_DRA_CH1R01 0x188 153 #define I82975X_DRA_CH1R23 0x189 154 155 156 #define I82975X_BNKARC 0x10e /* Type of device in each rank - Bank Arch (16b) 157 * 158 * 15:8 reserved 159 * 7:6 Rank 3 architecture 160 * 5:4 Rank 2 architecture 161 * 3:2 Rank 1 architecture 162 * 1:0 Rank 0 architecture 163 * 164 * 00 => 4 banks 165 * 01 => 8 banks 166 */ 167 #define I82975X_C0BNKARC 0x10e 168 #define I82975X_C1BNKARC 0x18e 169 170 171 172 #define I82975X_DRC 0x120 /* DRAM Controller Mode0 (32b) 173 * 174 * 31:30 reserved 175 * 29 init complete 176 * 28:11 reserved, according to Intel 177 * 22:21 number of channels 178 * 00=1 01=2 in 82875 179 * seems to be ECC mode 180 * bits in 82975 in Asus 181 * P5W 182 * 19:18 Data Integ Mode 183 * 00=none 01=ECC in 82875 184 * 10:8 refresh mode 185 * 7 reserved 186 * 6:4 mode select 187 * 3:2 reserved 188 * 1:0 DRAM type 10=Second Revision 189 * DDR2 SDRAM 190 * 00, 01, 11 reserved 191 */ 192 #define I82975X_DRC_CH0M0 0x120 193 #define I82975X_DRC_CH1M0 0x1A0 194 195 196 #define I82975X_DRC_M1 0x124 /* DRAM Controller Mode1 (32b) 197 * 31 0=Standard Address Map 198 * 1=Enhanced Address Map 199 * 30:0 reserved 200 */ 201 202 #define I82975X_DRC_CH0M1 0x124 203 #define I82975X_DRC_CH1M1 0x1A4 204 205 enum i82975x_chips { 206 I82975X = 0, 207 }; 208 209 struct i82975x_pvt { 210 void __iomem *mch_window; 211 }; 212 213 struct i82975x_dev_info { 214 const char *ctl_name; 215 }; 216 217 struct i82975x_error_info { 218 u16 errsts; 219 u32 eap; 220 u8 des; 221 u8 derrsyn; 222 u16 errsts2; 223 u8 chan; /* the channel is bit 0 of EAP */ 224 u8 xeap; /* extended eap bit */ 225 }; 226 227 static const struct i82975x_dev_info i82975x_devs[] = { 228 [I82975X] = { 229 .ctl_name = "i82975x" 230 }, 231 }; 232 233 static struct pci_dev *mci_pdev; /* init dev: in case that AGP code has 234 * already registered driver 235 */ 236 237 static int i82975x_registered = 1; 238 239 static void i82975x_get_error_info(struct mem_ctl_info *mci, 240 struct i82975x_error_info *info) 241 { 242 struct pci_dev *pdev; 243 244 pdev = to_pci_dev(mci->dev); 245 246 /* 247 * This is a mess because there is no atomic way to read all the 248 * registers at once and the registers can transition from CE being 249 * overwritten by UE. 250 */ 251 pci_read_config_word(pdev, I82975X_ERRSTS, &info->errsts); 252 pci_read_config_dword(pdev, I82975X_EAP, &info->eap); 253 pci_read_config_byte(pdev, I82975X_XEAP, &info->xeap); 254 pci_read_config_byte(pdev, I82975X_DES, &info->des); 255 pci_read_config_byte(pdev, I82975X_DERRSYN, &info->derrsyn); 256 pci_read_config_word(pdev, I82975X_ERRSTS, &info->errsts2); 257 258 pci_write_bits16(pdev, I82975X_ERRSTS, 0x0003, 0x0003); 259 260 /* 261 * If the error is the same then we can for both reads then 262 * the first set of reads is valid. If there is a change then 263 * there is a CE no info and the second set of reads is valid 264 * and should be UE info. 265 */ 266 if (!(info->errsts2 & 0x0003)) 267 return; 268 269 if ((info->errsts ^ info->errsts2) & 0x0003) { 270 pci_read_config_dword(pdev, I82975X_EAP, &info->eap); 271 pci_read_config_byte(pdev, I82975X_XEAP, &info->xeap); 272 pci_read_config_byte(pdev, I82975X_DES, &info->des); 273 pci_read_config_byte(pdev, I82975X_DERRSYN, 274 &info->derrsyn); 275 } 276 } 277 278 static int i82975x_process_error_info(struct mem_ctl_info *mci, 279 struct i82975x_error_info *info, int handle_errors) 280 { 281 int row, chan; 282 unsigned long offst, page; 283 284 if (!(info->errsts2 & 0x0003)) 285 return 0; 286 287 if (!handle_errors) 288 return 1; 289 290 if ((info->errsts ^ info->errsts2) & 0x0003) { 291 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 0, 0, 0, 292 -1, -1, -1, "UE overwrote CE", "", NULL); 293 info->errsts = info->errsts2; 294 } 295 296 page = (unsigned long) info->eap; 297 page >>= 1; 298 if (info->xeap & 1) 299 page |= 0x80000000; 300 page >>= (PAGE_SHIFT - 1); 301 row = edac_mc_find_csrow_by_page(mci, page); 302 303 if (row == -1) { 304 i82975x_mc_printk(mci, KERN_ERR, "error processing EAP:\n" 305 "\tXEAP=%u\n" 306 "\t EAP=0x%08x\n" 307 "\tPAGE=0x%08x\n", 308 (info->xeap & 1) ? 1 : 0, info->eap, (unsigned int) page); 309 return 0; 310 } 311 chan = (mci->csrows[row].nr_channels == 1) ? 0 : info->eap & 1; 312 offst = info->eap 313 & ((1 << PAGE_SHIFT) - 314 (1 << mci->csrows[row].channels[chan].dimm->grain)); 315 316 if (info->errsts & 0x0002) 317 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 318 page, offst, 0, 319 row, -1, -1, 320 "i82975x UE", "", NULL); 321 else 322 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 323 page, offst, info->derrsyn, 324 row, chan ? chan : 0, -1, 325 "i82975x CE", "", NULL); 326 327 return 1; 328 } 329 330 static void i82975x_check(struct mem_ctl_info *mci) 331 { 332 struct i82975x_error_info info; 333 334 debugf1("MC%d: %s()\n", mci->mc_idx, __func__); 335 i82975x_get_error_info(mci, &info); 336 i82975x_process_error_info(mci, &info, 1); 337 } 338 339 /* Return 1 if dual channel mode is active. Else return 0. */ 340 static int dual_channel_active(void __iomem *mch_window) 341 { 342 /* 343 * We treat interleaved-symmetric configuration as dual-channel - EAP's 344 * bit-0 giving the channel of the error location. 345 * 346 * All other configurations are treated as single channel - the EAP's 347 * bit-0 will resolve ok in symmetric area of mixed 348 * (symmetric/asymmetric) configurations 349 */ 350 u8 drb[4][2]; 351 int row; 352 int dualch; 353 354 for (dualch = 1, row = 0; dualch && (row < 4); row++) { 355 drb[row][0] = readb(mch_window + I82975X_DRB + row); 356 drb[row][1] = readb(mch_window + I82975X_DRB + row + 0x80); 357 dualch = dualch && (drb[row][0] == drb[row][1]); 358 } 359 return dualch; 360 } 361 362 static enum dev_type i82975x_dram_type(void __iomem *mch_window, int rank) 363 { 364 /* 365 * ECC is possible on i92975x ONLY with DEV_X8 366 */ 367 return DEV_X8; 368 } 369 370 static void i82975x_init_csrows(struct mem_ctl_info *mci, 371 struct pci_dev *pdev, void __iomem *mch_window) 372 { 373 static const char *labels[4] = { 374 "DIMM A1", "DIMM A2", 375 "DIMM B1", "DIMM B2" 376 }; 377 struct csrow_info *csrow; 378 unsigned long last_cumul_size; 379 u8 value; 380 u32 cumul_size, nr_pages; 381 int index, chan; 382 struct dimm_info *dimm; 383 enum dev_type dtype; 384 385 last_cumul_size = 0; 386 387 /* 388 * 82875 comment: 389 * The dram row boundary (DRB) reg values are boundary address 390 * for each DRAM row with a granularity of 32 or 64MB (single/dual 391 * channel operation). DRB regs are cumulative; therefore DRB7 will 392 * contain the total memory contained in all rows. 393 * 394 */ 395 396 for (index = 0; index < mci->nr_csrows; index++) { 397 csrow = &mci->csrows[index]; 398 399 value = readb(mch_window + I82975X_DRB + index + 400 ((index >= 4) ? 0x80 : 0)); 401 cumul_size = value; 402 cumul_size <<= (I82975X_DRB_SHIFT - PAGE_SHIFT); 403 /* 404 * Adjust cumul_size w.r.t number of channels 405 * 406 */ 407 if (csrow->nr_channels > 1) 408 cumul_size <<= 1; 409 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index, 410 cumul_size); 411 412 nr_pages = cumul_size - last_cumul_size; 413 if (!nr_pages) 414 continue; 415 416 /* 417 * Initialise dram labels 418 * index values: 419 * [0-7] for single-channel; i.e. csrow->nr_channels = 1 420 * [0-3] for dual-channel; i.e. csrow->nr_channels = 2 421 */ 422 dtype = i82975x_dram_type(mch_window, index); 423 for (chan = 0; chan < csrow->nr_channels; chan++) { 424 dimm = mci->csrows[index].channels[chan].dimm; 425 426 dimm->nr_pages = nr_pages / csrow->nr_channels; 427 strncpy(csrow->channels[chan].dimm->label, 428 labels[(index >> 1) + (chan * 2)], 429 EDAC_MC_LABEL_LEN); 430 dimm->grain = 1 << 7; /* 128Byte cache-line resolution */ 431 dimm->dtype = i82975x_dram_type(mch_window, index); 432 dimm->mtype = MEM_DDR2; /* I82975x supports only DDR2 */ 433 dimm->edac_mode = EDAC_SECDED; /* only supported */ 434 } 435 436 csrow->first_page = last_cumul_size; 437 csrow->last_page = cumul_size - 1; 438 last_cumul_size = cumul_size; 439 } 440 } 441 442 /* #define i82975x_DEBUG_IOMEM */ 443 444 #ifdef i82975x_DEBUG_IOMEM 445 static void i82975x_print_dram_timings(void __iomem *mch_window) 446 { 447 /* 448 * The register meanings are from Intel specs; 449 * (shows 13-5-5-5 for 800-DDR2) 450 * Asus P5W Bios reports 15-5-4-4 451 * What's your religion? 452 */ 453 static const int caslats[4] = { 5, 4, 3, 6 }; 454 u32 dtreg[2]; 455 456 dtreg[0] = readl(mch_window + 0x114); 457 dtreg[1] = readl(mch_window + 0x194); 458 i82975x_printk(KERN_INFO, "DRAM Timings : Ch0 Ch1\n" 459 " RAS Active Min = %d %d\n" 460 " CAS latency = %d %d\n" 461 " RAS to CAS = %d %d\n" 462 " RAS precharge = %d %d\n", 463 (dtreg[0] >> 19 ) & 0x0f, 464 (dtreg[1] >> 19) & 0x0f, 465 caslats[(dtreg[0] >> 8) & 0x03], 466 caslats[(dtreg[1] >> 8) & 0x03], 467 ((dtreg[0] >> 4) & 0x07) + 2, 468 ((dtreg[1] >> 4) & 0x07) + 2, 469 (dtreg[0] & 0x07) + 2, 470 (dtreg[1] & 0x07) + 2 471 ); 472 473 } 474 #endif 475 476 static int i82975x_probe1(struct pci_dev *pdev, int dev_idx) 477 { 478 int rc = -ENODEV; 479 struct mem_ctl_info *mci; 480 struct edac_mc_layer layers[2]; 481 struct i82975x_pvt *pvt; 482 void __iomem *mch_window; 483 u32 mchbar; 484 u32 drc[2]; 485 struct i82975x_error_info discard; 486 int chans; 487 #ifdef i82975x_DEBUG_IOMEM 488 u8 c0drb[4]; 489 u8 c1drb[4]; 490 #endif 491 492 debugf0("%s()\n", __func__); 493 494 pci_read_config_dword(pdev, I82975X_MCHBAR, &mchbar); 495 if (!(mchbar & 1)) { 496 debugf3("%s(): failed, MCHBAR disabled!\n", __func__); 497 goto fail0; 498 } 499 mchbar &= 0xffffc000; /* bits 31:14 used for 16K window */ 500 mch_window = ioremap_nocache(mchbar, 0x1000); 501 502 #ifdef i82975x_DEBUG_IOMEM 503 i82975x_printk(KERN_INFO, "MCHBAR real = %0x, remapped = %p\n", 504 mchbar, mch_window); 505 506 c0drb[0] = readb(mch_window + I82975X_DRB_CH0R0); 507 c0drb[1] = readb(mch_window + I82975X_DRB_CH0R1); 508 c0drb[2] = readb(mch_window + I82975X_DRB_CH0R2); 509 c0drb[3] = readb(mch_window + I82975X_DRB_CH0R3); 510 c1drb[0] = readb(mch_window + I82975X_DRB_CH1R0); 511 c1drb[1] = readb(mch_window + I82975X_DRB_CH1R1); 512 c1drb[2] = readb(mch_window + I82975X_DRB_CH1R2); 513 c1drb[3] = readb(mch_window + I82975X_DRB_CH1R3); 514 i82975x_printk(KERN_INFO, "DRBCH0R0 = 0x%02x\n", c0drb[0]); 515 i82975x_printk(KERN_INFO, "DRBCH0R1 = 0x%02x\n", c0drb[1]); 516 i82975x_printk(KERN_INFO, "DRBCH0R2 = 0x%02x\n", c0drb[2]); 517 i82975x_printk(KERN_INFO, "DRBCH0R3 = 0x%02x\n", c0drb[3]); 518 i82975x_printk(KERN_INFO, "DRBCH1R0 = 0x%02x\n", c1drb[0]); 519 i82975x_printk(KERN_INFO, "DRBCH1R1 = 0x%02x\n", c1drb[1]); 520 i82975x_printk(KERN_INFO, "DRBCH1R2 = 0x%02x\n", c1drb[2]); 521 i82975x_printk(KERN_INFO, "DRBCH1R3 = 0x%02x\n", c1drb[3]); 522 #endif 523 524 drc[0] = readl(mch_window + I82975X_DRC_CH0M0); 525 drc[1] = readl(mch_window + I82975X_DRC_CH1M0); 526 #ifdef i82975x_DEBUG_IOMEM 527 i82975x_printk(KERN_INFO, "DRC_CH0 = %0x, %s\n", drc[0], 528 ((drc[0] >> 21) & 3) == 1 ? 529 "ECC enabled" : "ECC disabled"); 530 i82975x_printk(KERN_INFO, "DRC_CH1 = %0x, %s\n", drc[1], 531 ((drc[1] >> 21) & 3) == 1 ? 532 "ECC enabled" : "ECC disabled"); 533 534 i82975x_printk(KERN_INFO, "C0 BNKARC = %0x\n", 535 readw(mch_window + I82975X_C0BNKARC)); 536 i82975x_printk(KERN_INFO, "C1 BNKARC = %0x\n", 537 readw(mch_window + I82975X_C1BNKARC)); 538 i82975x_print_dram_timings(mch_window); 539 goto fail1; 540 #endif 541 if (!(((drc[0] >> 21) & 3) == 1 || ((drc[1] >> 21) & 3) == 1)) { 542 i82975x_printk(KERN_INFO, "ECC disabled on both channels.\n"); 543 goto fail1; 544 } 545 546 chans = dual_channel_active(mch_window) + 1; 547 548 /* assuming only one controller, index thus is 0 */ 549 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; 550 layers[0].size = I82975X_NR_DIMMS; 551 layers[0].is_virt_csrow = true; 552 layers[1].type = EDAC_MC_LAYER_CHANNEL; 553 layers[1].size = I82975X_NR_CSROWS(chans); 554 layers[1].is_virt_csrow = false; 555 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt)); 556 if (!mci) { 557 rc = -ENOMEM; 558 goto fail1; 559 } 560 561 debugf3("%s(): init mci\n", __func__); 562 mci->dev = &pdev->dev; 563 mci->mtype_cap = MEM_FLAG_DDR2; 564 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; 565 mci->edac_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; 566 mci->mod_name = EDAC_MOD_STR; 567 mci->mod_ver = I82975X_REVISION; 568 mci->ctl_name = i82975x_devs[dev_idx].ctl_name; 569 mci->dev_name = pci_name(pdev); 570 mci->edac_check = i82975x_check; 571 mci->ctl_page_to_phys = NULL; 572 debugf3("%s(): init pvt\n", __func__); 573 pvt = (struct i82975x_pvt *) mci->pvt_info; 574 pvt->mch_window = mch_window; 575 i82975x_init_csrows(mci, pdev, mch_window); 576 mci->scrub_mode = SCRUB_HW_SRC; 577 i82975x_get_error_info(mci, &discard); /* clear counters */ 578 579 /* finalize this instance of memory controller with edac core */ 580 if (edac_mc_add_mc(mci)) { 581 debugf3("%s(): failed edac_mc_add_mc()\n", __func__); 582 goto fail2; 583 } 584 585 /* get this far and it's successful */ 586 debugf3("%s(): success\n", __func__); 587 return 0; 588 589 fail2: 590 edac_mc_free(mci); 591 592 fail1: 593 iounmap(mch_window); 594 fail0: 595 return rc; 596 } 597 598 /* returns count (>= 0), or negative on error */ 599 static int __devinit i82975x_init_one(struct pci_dev *pdev, 600 const struct pci_device_id *ent) 601 { 602 int rc; 603 604 debugf0("%s()\n", __func__); 605 606 if (pci_enable_device(pdev) < 0) 607 return -EIO; 608 609 rc = i82975x_probe1(pdev, ent->driver_data); 610 611 if (mci_pdev == NULL) 612 mci_pdev = pci_dev_get(pdev); 613 614 return rc; 615 } 616 617 static void __devexit i82975x_remove_one(struct pci_dev *pdev) 618 { 619 struct mem_ctl_info *mci; 620 struct i82975x_pvt *pvt; 621 622 debugf0("%s()\n", __func__); 623 624 mci = edac_mc_del_mc(&pdev->dev); 625 if (mci == NULL) 626 return; 627 628 pvt = mci->pvt_info; 629 if (pvt->mch_window) 630 iounmap( pvt->mch_window ); 631 632 edac_mc_free(mci); 633 } 634 635 static DEFINE_PCI_DEVICE_TABLE(i82975x_pci_tbl) = { 636 { 637 PCI_VEND_DEV(INTEL, 82975_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 638 I82975X 639 }, 640 { 641 0, 642 } /* 0 terminated list. */ 643 }; 644 645 MODULE_DEVICE_TABLE(pci, i82975x_pci_tbl); 646 647 static struct pci_driver i82975x_driver = { 648 .name = EDAC_MOD_STR, 649 .probe = i82975x_init_one, 650 .remove = __devexit_p(i82975x_remove_one), 651 .id_table = i82975x_pci_tbl, 652 }; 653 654 static int __init i82975x_init(void) 655 { 656 int pci_rc; 657 658 debugf3("%s()\n", __func__); 659 660 /* Ensure that the OPSTATE is set correctly for POLL or NMI */ 661 opstate_init(); 662 663 pci_rc = pci_register_driver(&i82975x_driver); 664 if (pci_rc < 0) 665 goto fail0; 666 667 if (mci_pdev == NULL) { 668 mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 669 PCI_DEVICE_ID_INTEL_82975_0, NULL); 670 671 if (!mci_pdev) { 672 debugf0("i82975x pci_get_device fail\n"); 673 pci_rc = -ENODEV; 674 goto fail1; 675 } 676 677 pci_rc = i82975x_init_one(mci_pdev, i82975x_pci_tbl); 678 679 if (pci_rc < 0) { 680 debugf0("i82975x init fail\n"); 681 pci_rc = -ENODEV; 682 goto fail1; 683 } 684 } 685 686 return 0; 687 688 fail1: 689 pci_unregister_driver(&i82975x_driver); 690 691 fail0: 692 if (mci_pdev != NULL) 693 pci_dev_put(mci_pdev); 694 695 return pci_rc; 696 } 697 698 static void __exit i82975x_exit(void) 699 { 700 debugf3("%s()\n", __func__); 701 702 pci_unregister_driver(&i82975x_driver); 703 704 if (!i82975x_registered) { 705 i82975x_remove_one(mci_pdev); 706 pci_dev_put(mci_pdev); 707 } 708 } 709 710 module_init(i82975x_init); 711 module_exit(i82975x_exit); 712 713 MODULE_LICENSE("GPL"); 714 MODULE_AUTHOR("Arvind R. <arvino55@gmail.com>"); 715 MODULE_DESCRIPTION("MC support for Intel 82975 memory hub controllers"); 716 717 module_param(edac_op_state, int, 0444); 718 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); 719