1 /* 2 * Intel e752x Memory Controller kernel module 3 * (C) 2004 Linux Networx (http://lnxi.com) 4 * This file may be distributed under the terms of the 5 * GNU General Public License. 6 * 7 * Implement support for the e7520, E7525, e7320 and i3100 memory controllers. 8 * 9 * Datasheets: 10 * http://www.intel.in/content/www/in/en/chipsets/e7525-memory-controller-hub-datasheet.html 11 * ftp://download.intel.com/design/intarch/datashts/31345803.pdf 12 * 13 * Written by Tom Zimmerman 14 * 15 * Contributors: 16 * Thayne Harbaugh at realmsys.com (?) 17 * Wang Zhenyu at intel.com 18 * Dave Jiang at mvista.com 19 * 20 */ 21 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/pci.h> 25 #include <linux/pci_ids.h> 26 #include <linux/edac.h> 27 #include "edac_core.h" 28 29 #define E752X_REVISION " Ver: 2.0.2" 30 #define EDAC_MOD_STR "e752x_edac" 31 32 static int report_non_memory_errors; 33 static int force_function_unhide; 34 static int sysbus_parity = -1; 35 36 static struct edac_pci_ctl_info *e752x_pci; 37 38 #define e752x_printk(level, fmt, arg...) \ 39 edac_printk(level, "e752x", fmt, ##arg) 40 41 #define e752x_mc_printk(mci, level, fmt, arg...) \ 42 edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg) 43 44 #ifndef PCI_DEVICE_ID_INTEL_7520_0 45 #define PCI_DEVICE_ID_INTEL_7520_0 0x3590 46 #endif /* PCI_DEVICE_ID_INTEL_7520_0 */ 47 48 #ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR 49 #define PCI_DEVICE_ID_INTEL_7520_1_ERR 0x3591 50 #endif /* PCI_DEVICE_ID_INTEL_7520_1_ERR */ 51 52 #ifndef PCI_DEVICE_ID_INTEL_7525_0 53 #define PCI_DEVICE_ID_INTEL_7525_0 0x359E 54 #endif /* PCI_DEVICE_ID_INTEL_7525_0 */ 55 56 #ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR 57 #define PCI_DEVICE_ID_INTEL_7525_1_ERR 0x3593 58 #endif /* PCI_DEVICE_ID_INTEL_7525_1_ERR */ 59 60 #ifndef PCI_DEVICE_ID_INTEL_7320_0 61 #define PCI_DEVICE_ID_INTEL_7320_0 0x3592 62 #endif /* PCI_DEVICE_ID_INTEL_7320_0 */ 63 64 #ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR 65 #define PCI_DEVICE_ID_INTEL_7320_1_ERR 0x3593 66 #endif /* PCI_DEVICE_ID_INTEL_7320_1_ERR */ 67 68 #ifndef PCI_DEVICE_ID_INTEL_3100_0 69 #define PCI_DEVICE_ID_INTEL_3100_0 0x35B0 70 #endif /* PCI_DEVICE_ID_INTEL_3100_0 */ 71 72 #ifndef PCI_DEVICE_ID_INTEL_3100_1_ERR 73 #define PCI_DEVICE_ID_INTEL_3100_1_ERR 0x35B1 74 #endif /* PCI_DEVICE_ID_INTEL_3100_1_ERR */ 75 76 #define E752X_NR_CSROWS 8 /* number of csrows */ 77 78 /* E752X register addresses - device 0 function 0 */ 79 #define E752X_MCHSCRB 0x52 /* Memory Scrub register (16b) */ 80 /* 81 * 6:5 Scrub Completion Count 82 * 3:2 Scrub Rate (i3100 only) 83 * 01=fast 10=normal 84 * 1:0 Scrub Mode enable 85 * 00=off 10=on 86 */ 87 #define E752X_DRB 0x60 /* DRAM row boundary register (8b) */ 88 #define E752X_DRA 0x70 /* DRAM row attribute register (8b) */ 89 /* 90 * 31:30 Device width row 7 91 * 01=x8 10=x4 11=x8 DDR2 92 * 27:26 Device width row 6 93 * 23:22 Device width row 5 94 * 19:20 Device width row 4 95 * 15:14 Device width row 3 96 * 11:10 Device width row 2 97 * 7:6 Device width row 1 98 * 3:2 Device width row 0 99 */ 100 #define E752X_DRC 0x7C /* DRAM controller mode reg (32b) */ 101 /* FIXME:IS THIS RIGHT? */ 102 /* 103 * 22 Number channels 0=1,1=2 104 * 19:18 DRB Granularity 32/64MB 105 */ 106 #define E752X_DRM 0x80 /* Dimm mapping register */ 107 #define E752X_DDRCSR 0x9A /* DDR control and status reg (16b) */ 108 /* 109 * 14:12 1 single A, 2 single B, 3 dual 110 */ 111 #define E752X_TOLM 0xC4 /* DRAM top of low memory reg (16b) */ 112 #define E752X_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */ 113 #define E752X_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */ 114 #define E752X_REMAPOFFSET 0xCA /* DRAM remap limit offset reg (16b) */ 115 116 /* E752X register addresses - device 0 function 1 */ 117 #define E752X_FERR_GLOBAL 0x40 /* Global first error register (32b) */ 118 #define E752X_NERR_GLOBAL 0x44 /* Global next error register (32b) */ 119 #define E752X_HI_FERR 0x50 /* Hub interface first error reg (8b) */ 120 #define E752X_HI_NERR 0x52 /* Hub interface next error reg (8b) */ 121 #define E752X_HI_ERRMASK 0x54 /* Hub interface error mask reg (8b) */ 122 #define E752X_HI_SMICMD 0x5A /* Hub interface SMI command reg (8b) */ 123 #define E752X_SYSBUS_FERR 0x60 /* System buss first error reg (16b) */ 124 #define E752X_SYSBUS_NERR 0x62 /* System buss next error reg (16b) */ 125 #define E752X_SYSBUS_ERRMASK 0x64 /* System buss error mask reg (16b) */ 126 #define E752X_SYSBUS_SMICMD 0x6A /* System buss SMI command reg (16b) */ 127 #define E752X_BUF_FERR 0x70 /* Memory buffer first error reg (8b) */ 128 #define E752X_BUF_NERR 0x72 /* Memory buffer next error reg (8b) */ 129 #define E752X_BUF_ERRMASK 0x74 /* Memory buffer error mask reg (8b) */ 130 #define E752X_BUF_SMICMD 0x7A /* Memory buffer SMI cmd reg (8b) */ 131 #define E752X_DRAM_FERR 0x80 /* DRAM first error register (16b) */ 132 #define E752X_DRAM_NERR 0x82 /* DRAM next error register (16b) */ 133 #define E752X_DRAM_ERRMASK 0x84 /* DRAM error mask register (8b) */ 134 #define E752X_DRAM_SMICMD 0x8A /* DRAM SMI command register (8b) */ 135 #define E752X_DRAM_RETR_ADD 0xAC /* DRAM Retry address register (32b) */ 136 #define E752X_DRAM_SEC1_ADD 0xA0 /* DRAM first correctable memory */ 137 /* error address register (32b) */ 138 /* 139 * 31 Reserved 140 * 30:2 CE address (64 byte block 34:6 141 * 1 Reserved 142 * 0 HiLoCS 143 */ 144 #define E752X_DRAM_SEC2_ADD 0xC8 /* DRAM first correctable memory */ 145 /* error address register (32b) */ 146 /* 147 * 31 Reserved 148 * 30:2 CE address (64 byte block 34:6) 149 * 1 Reserved 150 * 0 HiLoCS 151 */ 152 #define E752X_DRAM_DED_ADD 0xA4 /* DRAM first uncorrectable memory */ 153 /* error address register (32b) */ 154 /* 155 * 31 Reserved 156 * 30:2 CE address (64 byte block 34:6) 157 * 1 Reserved 158 * 0 HiLoCS 159 */ 160 #define E752X_DRAM_SCRB_ADD 0xA8 /* DRAM 1st uncorrectable scrub mem */ 161 /* error address register (32b) */ 162 /* 163 * 31 Reserved 164 * 30:2 CE address (64 byte block 34:6 165 * 1 Reserved 166 * 0 HiLoCS 167 */ 168 #define E752X_DRAM_SEC1_SYNDROME 0xC4 /* DRAM first correctable memory */ 169 /* error syndrome register (16b) */ 170 #define E752X_DRAM_SEC2_SYNDROME 0xC6 /* DRAM second correctable memory */ 171 /* error syndrome register (16b) */ 172 #define E752X_DEVPRES1 0xF4 /* Device Present 1 register (8b) */ 173 174 /* 3100 IMCH specific register addresses - device 0 function 1 */ 175 #define I3100_NSI_FERR 0x48 /* NSI first error reg (32b) */ 176 #define I3100_NSI_NERR 0x4C /* NSI next error reg (32b) */ 177 #define I3100_NSI_SMICMD 0x54 /* NSI SMI command register (32b) */ 178 #define I3100_NSI_EMASK 0x90 /* NSI error mask register (32b) */ 179 180 /* ICH5R register addresses - device 30 function 0 */ 181 #define ICH5R_PCI_STAT 0x06 /* PCI status register (16b) */ 182 #define ICH5R_PCI_2ND_STAT 0x1E /* PCI status secondary reg (16b) */ 183 #define ICH5R_PCI_BRIDGE_CTL 0x3E /* PCI bridge control register (16b) */ 184 185 enum e752x_chips { 186 E7520 = 0, 187 E7525 = 1, 188 E7320 = 2, 189 I3100 = 3 190 }; 191 192 /* 193 * Those chips Support single-rank and dual-rank memories only. 194 * 195 * On e752x chips, the odd rows are present only on dual-rank memories. 196 * Dividing the rank by two will provide the dimm# 197 * 198 * i3100 MC has a different mapping: it supports only 4 ranks. 199 * 200 * The mapping is (from 1 to n): 201 * slot single-ranked double-ranked 202 * dimm #1 -> rank #4 NA 203 * dimm #2 -> rank #3 NA 204 * dimm #3 -> rank #2 Ranks 2 and 3 205 * dimm #4 -> rank $1 Ranks 1 and 4 206 * 207 * FIXME: The current mapping for i3100 considers that it supports up to 8 208 * ranks/chanel, but datasheet says that the MC supports only 4 ranks. 209 */ 210 211 struct e752x_pvt { 212 struct pci_dev *dev_d0f0; 213 struct pci_dev *dev_d0f1; 214 u32 tolm; 215 u32 remapbase; 216 u32 remaplimit; 217 int mc_symmetric; 218 u8 map[8]; 219 int map_type; 220 const struct e752x_dev_info *dev_info; 221 }; 222 223 struct e752x_dev_info { 224 u16 err_dev; 225 u16 ctl_dev; 226 const char *ctl_name; 227 }; 228 229 struct e752x_error_info { 230 u32 ferr_global; 231 u32 nerr_global; 232 u32 nsi_ferr; /* 3100 only */ 233 u32 nsi_nerr; /* 3100 only */ 234 u8 hi_ferr; /* all but 3100 */ 235 u8 hi_nerr; /* all but 3100 */ 236 u16 sysbus_ferr; 237 u16 sysbus_nerr; 238 u8 buf_ferr; 239 u8 buf_nerr; 240 u16 dram_ferr; 241 u16 dram_nerr; 242 u32 dram_sec1_add; 243 u32 dram_sec2_add; 244 u16 dram_sec1_syndrome; 245 u16 dram_sec2_syndrome; 246 u32 dram_ded_add; 247 u32 dram_scrb_add; 248 u32 dram_retr_add; 249 }; 250 251 static const struct e752x_dev_info e752x_devs[] = { 252 [E7520] = { 253 .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR, 254 .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0, 255 .ctl_name = "E7520"}, 256 [E7525] = { 257 .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR, 258 .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0, 259 .ctl_name = "E7525"}, 260 [E7320] = { 261 .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR, 262 .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0, 263 .ctl_name = "E7320"}, 264 [I3100] = { 265 .err_dev = PCI_DEVICE_ID_INTEL_3100_1_ERR, 266 .ctl_dev = PCI_DEVICE_ID_INTEL_3100_0, 267 .ctl_name = "3100"}, 268 }; 269 270 /* Valid scrub rates for the e752x/3100 hardware memory scrubber. We 271 * map the scrubbing bandwidth to a hardware register value. The 'set' 272 * operation finds the 'matching or higher value'. Note that scrubbing 273 * on the e752x can only be enabled/disabled. The 3100 supports 274 * a normal and fast mode. 275 */ 276 277 #define SDRATE_EOT 0xFFFFFFFF 278 279 struct scrubrate { 280 u32 bandwidth; /* bandwidth consumed by scrubbing in bytes/sec */ 281 u16 scrubval; /* register value for scrub rate */ 282 }; 283 284 /* Rate below assumes same performance as i3100 using PC3200 DDR2 in 285 * normal mode. e752x bridges don't support choosing normal or fast mode, 286 * so the scrubbing bandwidth value isn't all that important - scrubbing is 287 * either on or off. 288 */ 289 static const struct scrubrate scrubrates_e752x[] = { 290 {0, 0x00}, /* Scrubbing Off */ 291 {500000, 0x02}, /* Scrubbing On */ 292 {SDRATE_EOT, 0x00} /* End of Table */ 293 }; 294 295 /* Fast mode: 2 GByte PC3200 DDR2 scrubbed in 33s = 63161283 bytes/s 296 * Normal mode: 125 (32000 / 256) times slower than fast mode. 297 */ 298 static const struct scrubrate scrubrates_i3100[] = { 299 {0, 0x00}, /* Scrubbing Off */ 300 {500000, 0x0a}, /* Normal mode - 32k clocks */ 301 {62500000, 0x06}, /* Fast mode - 256 clocks */ 302 {SDRATE_EOT, 0x00} /* End of Table */ 303 }; 304 305 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci, 306 unsigned long page) 307 { 308 u32 remap; 309 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info; 310 311 edac_dbg(3, "\n"); 312 313 if (page < pvt->tolm) 314 return page; 315 316 if ((page >= 0x100000) && (page < pvt->remapbase)) 317 return page; 318 319 remap = (page - pvt->tolm) + pvt->remapbase; 320 321 if (remap < pvt->remaplimit) 322 return remap; 323 324 e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page); 325 return pvt->tolm - 1; 326 } 327 328 static void do_process_ce(struct mem_ctl_info *mci, u16 error_one, 329 u32 sec1_add, u16 sec1_syndrome) 330 { 331 u32 page; 332 int row; 333 int channel; 334 int i; 335 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info; 336 337 edac_dbg(3, "\n"); 338 339 /* convert the addr to 4k page */ 340 page = sec1_add >> (PAGE_SHIFT - 4); 341 342 /* FIXME - check for -1 */ 343 if (pvt->mc_symmetric) { 344 /* chip select are bits 14 & 13 */ 345 row = ((page >> 1) & 3); 346 e752x_printk(KERN_WARNING, 347 "Test row %d Table %d %d %d %d %d %d %d %d\n", row, 348 pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3], 349 pvt->map[4], pvt->map[5], pvt->map[6], 350 pvt->map[7]); 351 352 /* test for channel remapping */ 353 for (i = 0; i < 8; i++) { 354 if (pvt->map[i] == row) 355 break; 356 } 357 358 e752x_printk(KERN_WARNING, "Test computed row %d\n", i); 359 360 if (i < 8) 361 row = i; 362 else 363 e752x_mc_printk(mci, KERN_WARNING, 364 "row %d not found in remap table\n", 365 row); 366 } else 367 row = edac_mc_find_csrow_by_page(mci, page); 368 369 /* 0 = channel A, 1 = channel B */ 370 channel = !(error_one & 1); 371 372 /* e752x mc reads 34:6 of the DRAM linear address */ 373 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 374 page, offset_in_page(sec1_add << 4), sec1_syndrome, 375 row, channel, -1, 376 "e752x CE", ""); 377 } 378 379 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one, 380 u32 sec1_add, u16 sec1_syndrome, int *error_found, 381 int handle_error) 382 { 383 *error_found = 1; 384 385 if (handle_error) 386 do_process_ce(mci, error_one, sec1_add, sec1_syndrome); 387 } 388 389 static void do_process_ue(struct mem_ctl_info *mci, u16 error_one, 390 u32 ded_add, u32 scrb_add) 391 { 392 u32 error_2b, block_page; 393 int row; 394 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info; 395 396 edac_dbg(3, "\n"); 397 398 if (error_one & 0x0202) { 399 error_2b = ded_add; 400 401 /* convert to 4k address */ 402 block_page = error_2b >> (PAGE_SHIFT - 4); 403 404 row = pvt->mc_symmetric ? 405 /* chip select are bits 14 & 13 */ 406 ((block_page >> 1) & 3) : 407 edac_mc_find_csrow_by_page(mci, block_page); 408 409 /* e752x mc reads 34:6 of the DRAM linear address */ 410 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 411 block_page, 412 offset_in_page(error_2b << 4), 0, 413 row, -1, -1, 414 "e752x UE from Read", ""); 415 416 } 417 if (error_one & 0x0404) { 418 error_2b = scrb_add; 419 420 /* convert to 4k address */ 421 block_page = error_2b >> (PAGE_SHIFT - 4); 422 423 row = pvt->mc_symmetric ? 424 /* chip select are bits 14 & 13 */ 425 ((block_page >> 1) & 3) : 426 edac_mc_find_csrow_by_page(mci, block_page); 427 428 /* e752x mc reads 34:6 of the DRAM linear address */ 429 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 430 block_page, 431 offset_in_page(error_2b << 4), 0, 432 row, -1, -1, 433 "e752x UE from Scruber", ""); 434 } 435 } 436 437 static inline void process_ue(struct mem_ctl_info *mci, u16 error_one, 438 u32 ded_add, u32 scrb_add, int *error_found, 439 int handle_error) 440 { 441 *error_found = 1; 442 443 if (handle_error) 444 do_process_ue(mci, error_one, ded_add, scrb_add); 445 } 446 447 static inline void process_ue_no_info_wr(struct mem_ctl_info *mci, 448 int *error_found, int handle_error) 449 { 450 *error_found = 1; 451 452 if (!handle_error) 453 return; 454 455 edac_dbg(3, "\n"); 456 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0, 457 -1, -1, -1, 458 "e752x UE log memory write", ""); 459 } 460 461 static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error, 462 u32 retry_add) 463 { 464 u32 error_1b, page; 465 int row; 466 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info; 467 468 error_1b = retry_add; 469 page = error_1b >> (PAGE_SHIFT - 4); /* convert the addr to 4k page */ 470 471 /* chip select are bits 14 & 13 */ 472 row = pvt->mc_symmetric ? ((page >> 1) & 3) : 473 edac_mc_find_csrow_by_page(mci, page); 474 475 e752x_mc_printk(mci, KERN_WARNING, 476 "CE page 0x%lx, row %d : Memory read retry\n", 477 (long unsigned int)page, row); 478 } 479 480 static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error, 481 u32 retry_add, int *error_found, 482 int handle_error) 483 { 484 *error_found = 1; 485 486 if (handle_error) 487 do_process_ded_retry(mci, error, retry_add); 488 } 489 490 static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error, 491 int *error_found, int handle_error) 492 { 493 *error_found = 1; 494 495 if (handle_error) 496 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n"); 497 } 498 499 static char *global_message[11] = { 500 "PCI Express C1", 501 "PCI Express C", 502 "PCI Express B1", 503 "PCI Express B", 504 "PCI Express A1", 505 "PCI Express A", 506 "DMA Controller", 507 "HUB or NS Interface", 508 "System Bus", 509 "DRAM Controller", /* 9th entry */ 510 "Internal Buffer" 511 }; 512 513 #define DRAM_ENTRY 9 514 515 static char *fatal_message[2] = { "Non-Fatal ", "Fatal " }; 516 517 static void do_global_error(int fatal, u32 errors) 518 { 519 int i; 520 521 for (i = 0; i < 11; i++) { 522 if (errors & (1 << i)) { 523 /* If the error is from DRAM Controller OR 524 * we are to report ALL errors, then 525 * report the error 526 */ 527 if ((i == DRAM_ENTRY) || report_non_memory_errors) 528 e752x_printk(KERN_WARNING, "%sError %s\n", 529 fatal_message[fatal], 530 global_message[i]); 531 } 532 } 533 } 534 535 static inline void global_error(int fatal, u32 errors, int *error_found, 536 int handle_error) 537 { 538 *error_found = 1; 539 540 if (handle_error) 541 do_global_error(fatal, errors); 542 } 543 544 static char *hub_message[7] = { 545 "HI Address or Command Parity", "HI Illegal Access", 546 "HI Internal Parity", "Out of Range Access", 547 "HI Data Parity", "Enhanced Config Access", 548 "Hub Interface Target Abort" 549 }; 550 551 static void do_hub_error(int fatal, u8 errors) 552 { 553 int i; 554 555 for (i = 0; i < 7; i++) { 556 if (errors & (1 << i)) 557 e752x_printk(KERN_WARNING, "%sError %s\n", 558 fatal_message[fatal], hub_message[i]); 559 } 560 } 561 562 static inline void hub_error(int fatal, u8 errors, int *error_found, 563 int handle_error) 564 { 565 *error_found = 1; 566 567 if (handle_error) 568 do_hub_error(fatal, errors); 569 } 570 571 #define NSI_FATAL_MASK 0x0c080081 572 #define NSI_NON_FATAL_MASK 0x23a0ba64 573 #define NSI_ERR_MASK (NSI_FATAL_MASK | NSI_NON_FATAL_MASK) 574 575 static char *nsi_message[30] = { 576 "NSI Link Down", /* NSI_FERR/NSI_NERR bit 0, fatal error */ 577 "", /* reserved */ 578 "NSI Parity Error", /* bit 2, non-fatal */ 579 "", /* reserved */ 580 "", /* reserved */ 581 "Correctable Error Message", /* bit 5, non-fatal */ 582 "Non-Fatal Error Message", /* bit 6, non-fatal */ 583 "Fatal Error Message", /* bit 7, fatal */ 584 "", /* reserved */ 585 "Receiver Error", /* bit 9, non-fatal */ 586 "", /* reserved */ 587 "Bad TLP", /* bit 11, non-fatal */ 588 "Bad DLLP", /* bit 12, non-fatal */ 589 "REPLAY_NUM Rollover", /* bit 13, non-fatal */ 590 "", /* reserved */ 591 "Replay Timer Timeout", /* bit 15, non-fatal */ 592 "", /* reserved */ 593 "", /* reserved */ 594 "", /* reserved */ 595 "Data Link Protocol Error", /* bit 19, fatal */ 596 "", /* reserved */ 597 "Poisoned TLP", /* bit 21, non-fatal */ 598 "", /* reserved */ 599 "Completion Timeout", /* bit 23, non-fatal */ 600 "Completer Abort", /* bit 24, non-fatal */ 601 "Unexpected Completion", /* bit 25, non-fatal */ 602 "Receiver Overflow", /* bit 26, fatal */ 603 "Malformed TLP", /* bit 27, fatal */ 604 "", /* reserved */ 605 "Unsupported Request" /* bit 29, non-fatal */ 606 }; 607 608 static void do_nsi_error(int fatal, u32 errors) 609 { 610 int i; 611 612 for (i = 0; i < 30; i++) { 613 if (errors & (1 << i)) 614 printk(KERN_WARNING "%sError %s\n", 615 fatal_message[fatal], nsi_message[i]); 616 } 617 } 618 619 static inline void nsi_error(int fatal, u32 errors, int *error_found, 620 int handle_error) 621 { 622 *error_found = 1; 623 624 if (handle_error) 625 do_nsi_error(fatal, errors); 626 } 627 628 static char *membuf_message[4] = { 629 "Internal PMWB to DRAM parity", 630 "Internal PMWB to System Bus Parity", 631 "Internal System Bus or IO to PMWB Parity", 632 "Internal DRAM to PMWB Parity" 633 }; 634 635 static void do_membuf_error(u8 errors) 636 { 637 int i; 638 639 for (i = 0; i < 4; i++) { 640 if (errors & (1 << i)) 641 e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n", 642 membuf_message[i]); 643 } 644 } 645 646 static inline void membuf_error(u8 errors, int *error_found, int handle_error) 647 { 648 *error_found = 1; 649 650 if (handle_error) 651 do_membuf_error(errors); 652 } 653 654 static char *sysbus_message[10] = { 655 "Addr or Request Parity", 656 "Data Strobe Glitch", 657 "Addr Strobe Glitch", 658 "Data Parity", 659 "Addr Above TOM", 660 "Non DRAM Lock Error", 661 "MCERR", "BINIT", 662 "Memory Parity", 663 "IO Subsystem Parity" 664 }; 665 666 static void do_sysbus_error(int fatal, u32 errors) 667 { 668 int i; 669 670 for (i = 0; i < 10; i++) { 671 if (errors & (1 << i)) 672 e752x_printk(KERN_WARNING, "%sError System Bus %s\n", 673 fatal_message[fatal], sysbus_message[i]); 674 } 675 } 676 677 static inline void sysbus_error(int fatal, u32 errors, int *error_found, 678 int handle_error) 679 { 680 *error_found = 1; 681 682 if (handle_error) 683 do_sysbus_error(fatal, errors); 684 } 685 686 static void e752x_check_hub_interface(struct e752x_error_info *info, 687 int *error_found, int handle_error) 688 { 689 u8 stat8; 690 691 //pci_read_config_byte(dev,E752X_HI_FERR,&stat8); 692 693 stat8 = info->hi_ferr; 694 695 if (stat8 & 0x7f) { /* Error, so process */ 696 stat8 &= 0x7f; 697 698 if (stat8 & 0x2b) 699 hub_error(1, stat8 & 0x2b, error_found, handle_error); 700 701 if (stat8 & 0x54) 702 hub_error(0, stat8 & 0x54, error_found, handle_error); 703 } 704 //pci_read_config_byte(dev,E752X_HI_NERR,&stat8); 705 706 stat8 = info->hi_nerr; 707 708 if (stat8 & 0x7f) { /* Error, so process */ 709 stat8 &= 0x7f; 710 711 if (stat8 & 0x2b) 712 hub_error(1, stat8 & 0x2b, error_found, handle_error); 713 714 if (stat8 & 0x54) 715 hub_error(0, stat8 & 0x54, error_found, handle_error); 716 } 717 } 718 719 static void e752x_check_ns_interface(struct e752x_error_info *info, 720 int *error_found, int handle_error) 721 { 722 u32 stat32; 723 724 stat32 = info->nsi_ferr; 725 if (stat32 & NSI_ERR_MASK) { /* Error, so process */ 726 if (stat32 & NSI_FATAL_MASK) /* check for fatal errors */ 727 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found, 728 handle_error); 729 if (stat32 & NSI_NON_FATAL_MASK) /* check for non-fatal ones */ 730 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found, 731 handle_error); 732 } 733 stat32 = info->nsi_nerr; 734 if (stat32 & NSI_ERR_MASK) { 735 if (stat32 & NSI_FATAL_MASK) 736 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found, 737 handle_error); 738 if (stat32 & NSI_NON_FATAL_MASK) 739 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found, 740 handle_error); 741 } 742 } 743 744 static void e752x_check_sysbus(struct e752x_error_info *info, 745 int *error_found, int handle_error) 746 { 747 u32 stat32, error32; 748 749 //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32); 750 stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16); 751 752 if (stat32 == 0) 753 return; /* no errors */ 754 755 error32 = (stat32 >> 16) & 0x3ff; 756 stat32 = stat32 & 0x3ff; 757 758 if (stat32 & 0x087) 759 sysbus_error(1, stat32 & 0x087, error_found, handle_error); 760 761 if (stat32 & 0x378) 762 sysbus_error(0, stat32 & 0x378, error_found, handle_error); 763 764 if (error32 & 0x087) 765 sysbus_error(1, error32 & 0x087, error_found, handle_error); 766 767 if (error32 & 0x378) 768 sysbus_error(0, error32 & 0x378, error_found, handle_error); 769 } 770 771 static void e752x_check_membuf(struct e752x_error_info *info, 772 int *error_found, int handle_error) 773 { 774 u8 stat8; 775 776 stat8 = info->buf_ferr; 777 778 if (stat8 & 0x0f) { /* Error, so process */ 779 stat8 &= 0x0f; 780 membuf_error(stat8, error_found, handle_error); 781 } 782 783 stat8 = info->buf_nerr; 784 785 if (stat8 & 0x0f) { /* Error, so process */ 786 stat8 &= 0x0f; 787 membuf_error(stat8, error_found, handle_error); 788 } 789 } 790 791 static void e752x_check_dram(struct mem_ctl_info *mci, 792 struct e752x_error_info *info, int *error_found, 793 int handle_error) 794 { 795 u16 error_one, error_next; 796 797 error_one = info->dram_ferr; 798 error_next = info->dram_nerr; 799 800 /* decode and report errors */ 801 if (error_one & 0x0101) /* check first error correctable */ 802 process_ce(mci, error_one, info->dram_sec1_add, 803 info->dram_sec1_syndrome, error_found, handle_error); 804 805 if (error_next & 0x0101) /* check next error correctable */ 806 process_ce(mci, error_next, info->dram_sec2_add, 807 info->dram_sec2_syndrome, error_found, handle_error); 808 809 if (error_one & 0x4040) 810 process_ue_no_info_wr(mci, error_found, handle_error); 811 812 if (error_next & 0x4040) 813 process_ue_no_info_wr(mci, error_found, handle_error); 814 815 if (error_one & 0x2020) 816 process_ded_retry(mci, error_one, info->dram_retr_add, 817 error_found, handle_error); 818 819 if (error_next & 0x2020) 820 process_ded_retry(mci, error_next, info->dram_retr_add, 821 error_found, handle_error); 822 823 if (error_one & 0x0808) 824 process_threshold_ce(mci, error_one, error_found, handle_error); 825 826 if (error_next & 0x0808) 827 process_threshold_ce(mci, error_next, error_found, 828 handle_error); 829 830 if (error_one & 0x0606) 831 process_ue(mci, error_one, info->dram_ded_add, 832 info->dram_scrb_add, error_found, handle_error); 833 834 if (error_next & 0x0606) 835 process_ue(mci, error_next, info->dram_ded_add, 836 info->dram_scrb_add, error_found, handle_error); 837 } 838 839 static void e752x_get_error_info(struct mem_ctl_info *mci, 840 struct e752x_error_info *info) 841 { 842 struct pci_dev *dev; 843 struct e752x_pvt *pvt; 844 845 memset(info, 0, sizeof(*info)); 846 pvt = (struct e752x_pvt *)mci->pvt_info; 847 dev = pvt->dev_d0f1; 848 pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global); 849 850 if (info->ferr_global) { 851 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) { 852 pci_read_config_dword(dev, I3100_NSI_FERR, 853 &info->nsi_ferr); 854 info->hi_ferr = 0; 855 } else { 856 pci_read_config_byte(dev, E752X_HI_FERR, 857 &info->hi_ferr); 858 info->nsi_ferr = 0; 859 } 860 pci_read_config_word(dev, E752X_SYSBUS_FERR, 861 &info->sysbus_ferr); 862 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr); 863 pci_read_config_word(dev, E752X_DRAM_FERR, &info->dram_ferr); 864 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD, 865 &info->dram_sec1_add); 866 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME, 867 &info->dram_sec1_syndrome); 868 pci_read_config_dword(dev, E752X_DRAM_DED_ADD, 869 &info->dram_ded_add); 870 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD, 871 &info->dram_scrb_add); 872 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD, 873 &info->dram_retr_add); 874 875 /* ignore the reserved bits just in case */ 876 if (info->hi_ferr & 0x7f) 877 pci_write_config_byte(dev, E752X_HI_FERR, 878 info->hi_ferr); 879 880 if (info->nsi_ferr & NSI_ERR_MASK) 881 pci_write_config_dword(dev, I3100_NSI_FERR, 882 info->nsi_ferr); 883 884 if (info->sysbus_ferr) 885 pci_write_config_word(dev, E752X_SYSBUS_FERR, 886 info->sysbus_ferr); 887 888 if (info->buf_ferr & 0x0f) 889 pci_write_config_byte(dev, E752X_BUF_FERR, 890 info->buf_ferr); 891 892 if (info->dram_ferr) 893 pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_FERR, 894 info->dram_ferr, info->dram_ferr); 895 896 pci_write_config_dword(dev, E752X_FERR_GLOBAL, 897 info->ferr_global); 898 } 899 900 pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global); 901 902 if (info->nerr_global) { 903 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) { 904 pci_read_config_dword(dev, I3100_NSI_NERR, 905 &info->nsi_nerr); 906 info->hi_nerr = 0; 907 } else { 908 pci_read_config_byte(dev, E752X_HI_NERR, 909 &info->hi_nerr); 910 info->nsi_nerr = 0; 911 } 912 pci_read_config_word(dev, E752X_SYSBUS_NERR, 913 &info->sysbus_nerr); 914 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr); 915 pci_read_config_word(dev, E752X_DRAM_NERR, &info->dram_nerr); 916 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD, 917 &info->dram_sec2_add); 918 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME, 919 &info->dram_sec2_syndrome); 920 921 if (info->hi_nerr & 0x7f) 922 pci_write_config_byte(dev, E752X_HI_NERR, 923 info->hi_nerr); 924 925 if (info->nsi_nerr & NSI_ERR_MASK) 926 pci_write_config_dword(dev, I3100_NSI_NERR, 927 info->nsi_nerr); 928 929 if (info->sysbus_nerr) 930 pci_write_config_word(dev, E752X_SYSBUS_NERR, 931 info->sysbus_nerr); 932 933 if (info->buf_nerr & 0x0f) 934 pci_write_config_byte(dev, E752X_BUF_NERR, 935 info->buf_nerr); 936 937 if (info->dram_nerr) 938 pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_NERR, 939 info->dram_nerr, info->dram_nerr); 940 941 pci_write_config_dword(dev, E752X_NERR_GLOBAL, 942 info->nerr_global); 943 } 944 } 945 946 static int e752x_process_error_info(struct mem_ctl_info *mci, 947 struct e752x_error_info *info, 948 int handle_errors) 949 { 950 u32 error32, stat32; 951 int error_found; 952 953 error_found = 0; 954 error32 = (info->ferr_global >> 18) & 0x3ff; 955 stat32 = (info->ferr_global >> 4) & 0x7ff; 956 957 if (error32) 958 global_error(1, error32, &error_found, handle_errors); 959 960 if (stat32) 961 global_error(0, stat32, &error_found, handle_errors); 962 963 error32 = (info->nerr_global >> 18) & 0x3ff; 964 stat32 = (info->nerr_global >> 4) & 0x7ff; 965 966 if (error32) 967 global_error(1, error32, &error_found, handle_errors); 968 969 if (stat32) 970 global_error(0, stat32, &error_found, handle_errors); 971 972 e752x_check_hub_interface(info, &error_found, handle_errors); 973 e752x_check_ns_interface(info, &error_found, handle_errors); 974 e752x_check_sysbus(info, &error_found, handle_errors); 975 e752x_check_membuf(info, &error_found, handle_errors); 976 e752x_check_dram(mci, info, &error_found, handle_errors); 977 return error_found; 978 } 979 980 static void e752x_check(struct mem_ctl_info *mci) 981 { 982 struct e752x_error_info info; 983 984 edac_dbg(3, "\n"); 985 e752x_get_error_info(mci, &info); 986 e752x_process_error_info(mci, &info, 1); 987 } 988 989 /* Program byte/sec bandwidth scrub rate to hardware */ 990 static int set_sdram_scrub_rate(struct mem_ctl_info *mci, u32 new_bw) 991 { 992 const struct scrubrate *scrubrates; 993 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; 994 struct pci_dev *pdev = pvt->dev_d0f0; 995 int i; 996 997 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0) 998 scrubrates = scrubrates_i3100; 999 else 1000 scrubrates = scrubrates_e752x; 1001 1002 /* Translate the desired scrub rate to a e752x/3100 register value. 1003 * Search for the bandwidth that is equal or greater than the 1004 * desired rate and program the cooresponding register value. 1005 */ 1006 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++) 1007 if (scrubrates[i].bandwidth >= new_bw) 1008 break; 1009 1010 if (scrubrates[i].bandwidth == SDRATE_EOT) 1011 return -1; 1012 1013 pci_write_config_word(pdev, E752X_MCHSCRB, scrubrates[i].scrubval); 1014 1015 return scrubrates[i].bandwidth; 1016 } 1017 1018 /* Convert current scrub rate value into byte/sec bandwidth */ 1019 static int get_sdram_scrub_rate(struct mem_ctl_info *mci) 1020 { 1021 const struct scrubrate *scrubrates; 1022 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info; 1023 struct pci_dev *pdev = pvt->dev_d0f0; 1024 u16 scrubval; 1025 int i; 1026 1027 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0) 1028 scrubrates = scrubrates_i3100; 1029 else 1030 scrubrates = scrubrates_e752x; 1031 1032 /* Find the bandwidth matching the memory scrubber configuration */ 1033 pci_read_config_word(pdev, E752X_MCHSCRB, &scrubval); 1034 scrubval = scrubval & 0x0f; 1035 1036 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++) 1037 if (scrubrates[i].scrubval == scrubval) 1038 break; 1039 1040 if (scrubrates[i].bandwidth == SDRATE_EOT) { 1041 e752x_printk(KERN_WARNING, 1042 "Invalid sdram scrub control value: 0x%x\n", scrubval); 1043 return -1; 1044 } 1045 return scrubrates[i].bandwidth; 1046 1047 } 1048 1049 /* Return 1 if dual channel mode is active. Else return 0. */ 1050 static inline int dual_channel_active(u16 ddrcsr) 1051 { 1052 return (((ddrcsr >> 12) & 3) == 3); 1053 } 1054 1055 /* Remap csrow index numbers if map_type is "reverse" 1056 */ 1057 static inline int remap_csrow_index(struct mem_ctl_info *mci, int index) 1058 { 1059 struct e752x_pvt *pvt = mci->pvt_info; 1060 1061 if (!pvt->map_type) 1062 return (7 - index); 1063 1064 return (index); 1065 } 1066 1067 static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, 1068 u16 ddrcsr) 1069 { 1070 struct csrow_info *csrow; 1071 enum edac_type edac_mode; 1072 unsigned long last_cumul_size; 1073 int index, mem_dev, drc_chan; 1074 int drc_drbg; /* DRB granularity 0=64mb, 1=128mb */ 1075 int drc_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */ 1076 u8 value; 1077 u32 dra, drc, cumul_size, i, nr_pages; 1078 1079 dra = 0; 1080 for (index = 0; index < 4; index++) { 1081 u8 dra_reg; 1082 pci_read_config_byte(pdev, E752X_DRA + index, &dra_reg); 1083 dra |= dra_reg << (index * 8); 1084 } 1085 pci_read_config_dword(pdev, E752X_DRC, &drc); 1086 drc_chan = dual_channel_active(ddrcsr) ? 1 : 0; 1087 drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */ 1088 drc_ddim = (drc >> 20) & 0x3; 1089 1090 /* The dram row boundary (DRB) reg values are boundary address for 1091 * each DRAM row with a granularity of 64 or 128MB (single/dual 1092 * channel operation). DRB regs are cumulative; therefore DRB7 will 1093 * contain the total memory contained in all eight rows. 1094 */ 1095 for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) { 1096 /* mem_dev 0=x8, 1=x4 */ 1097 mem_dev = (dra >> (index * 4 + 2)) & 0x3; 1098 csrow = mci->csrows[remap_csrow_index(mci, index)]; 1099 1100 mem_dev = (mem_dev == 2); 1101 pci_read_config_byte(pdev, E752X_DRB + index, &value); 1102 /* convert a 128 or 64 MiB DRB to a page size. */ 1103 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT); 1104 edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size); 1105 if (cumul_size == last_cumul_size) 1106 continue; /* not populated */ 1107 1108 csrow->first_page = last_cumul_size; 1109 csrow->last_page = cumul_size - 1; 1110 nr_pages = cumul_size - last_cumul_size; 1111 last_cumul_size = cumul_size; 1112 1113 /* 1114 * if single channel or x8 devices then SECDED 1115 * if dual channel and x4 then S4ECD4ED 1116 */ 1117 if (drc_ddim) { 1118 if (drc_chan && mem_dev) { 1119 edac_mode = EDAC_S4ECD4ED; 1120 mci->edac_cap |= EDAC_FLAG_S4ECD4ED; 1121 } else { 1122 edac_mode = EDAC_SECDED; 1123 mci->edac_cap |= EDAC_FLAG_SECDED; 1124 } 1125 } else 1126 edac_mode = EDAC_NONE; 1127 for (i = 0; i < csrow->nr_channels; i++) { 1128 struct dimm_info *dimm = csrow->channels[i]->dimm; 1129 1130 edac_dbg(3, "Initializing rank at (%i,%i)\n", index, i); 1131 dimm->nr_pages = nr_pages / csrow->nr_channels; 1132 dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */ 1133 dimm->mtype = MEM_RDDR; /* only one type supported */ 1134 dimm->dtype = mem_dev ? DEV_X4 : DEV_X8; 1135 dimm->edac_mode = edac_mode; 1136 } 1137 } 1138 } 1139 1140 static void e752x_init_mem_map_table(struct pci_dev *pdev, 1141 struct e752x_pvt *pvt) 1142 { 1143 int index; 1144 u8 value, last, row; 1145 1146 last = 0; 1147 row = 0; 1148 1149 for (index = 0; index < 8; index += 2) { 1150 pci_read_config_byte(pdev, E752X_DRB + index, &value); 1151 /* test if there is a dimm in this slot */ 1152 if (value == last) { 1153 /* no dimm in the slot, so flag it as empty */ 1154 pvt->map[index] = 0xff; 1155 pvt->map[index + 1] = 0xff; 1156 } else { /* there is a dimm in the slot */ 1157 pvt->map[index] = row; 1158 row++; 1159 last = value; 1160 /* test the next value to see if the dimm is double 1161 * sided 1162 */ 1163 pci_read_config_byte(pdev, E752X_DRB + index + 1, 1164 &value); 1165 1166 /* the dimm is single sided, so flag as empty */ 1167 /* this is a double sided dimm to save the next row #*/ 1168 pvt->map[index + 1] = (value == last) ? 0xff : row; 1169 row++; 1170 last = value; 1171 } 1172 } 1173 } 1174 1175 /* Return 0 on success or 1 on failure. */ 1176 static int e752x_get_devs(struct pci_dev *pdev, int dev_idx, 1177 struct e752x_pvt *pvt) 1178 { 1179 pvt->dev_d0f1 = pci_get_device(PCI_VENDOR_ID_INTEL, 1180 pvt->dev_info->err_dev, NULL); 1181 1182 if (pvt->dev_d0f1 == NULL) { 1183 pvt->dev_d0f1 = pci_scan_single_device(pdev->bus, 1184 PCI_DEVFN(0, 1)); 1185 pci_dev_get(pvt->dev_d0f1); 1186 } 1187 1188 if (pvt->dev_d0f1 == NULL) { 1189 e752x_printk(KERN_ERR, "error reporting device not found:" 1190 "vendor %x device 0x%x (broken BIOS?)\n", 1191 PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev); 1192 return 1; 1193 } 1194 1195 pvt->dev_d0f0 = pci_get_device(PCI_VENDOR_ID_INTEL, 1196 e752x_devs[dev_idx].ctl_dev, 1197 NULL); 1198 1199 if (pvt->dev_d0f0 == NULL) 1200 goto fail; 1201 1202 return 0; 1203 1204 fail: 1205 pci_dev_put(pvt->dev_d0f1); 1206 return 1; 1207 } 1208 1209 /* Setup system bus parity mask register. 1210 * Sysbus parity supported on: 1211 * e7320/e7520/e7525 + Xeon 1212 */ 1213 static void e752x_init_sysbus_parity_mask(struct e752x_pvt *pvt) 1214 { 1215 char *cpu_id = cpu_data(0).x86_model_id; 1216 struct pci_dev *dev = pvt->dev_d0f1; 1217 int enable = 1; 1218 1219 /* Allow module parameter override, else see if CPU supports parity */ 1220 if (sysbus_parity != -1) { 1221 enable = sysbus_parity; 1222 } else if (cpu_id[0] && !strstr(cpu_id, "Xeon")) { 1223 e752x_printk(KERN_INFO, "System Bus Parity not " 1224 "supported by CPU, disabling\n"); 1225 enable = 0; 1226 } 1227 1228 if (enable) 1229 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0000); 1230 else 1231 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0309); 1232 } 1233 1234 static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt) 1235 { 1236 struct pci_dev *dev; 1237 1238 dev = pvt->dev_d0f1; 1239 /* Turn off error disable & SMI in case the BIOS turned it on */ 1240 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) { 1241 pci_write_config_dword(dev, I3100_NSI_EMASK, 0); 1242 pci_write_config_dword(dev, I3100_NSI_SMICMD, 0); 1243 } else { 1244 pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00); 1245 pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00); 1246 } 1247 1248 e752x_init_sysbus_parity_mask(pvt); 1249 1250 pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00); 1251 pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00); 1252 pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00); 1253 pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00); 1254 pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00); 1255 } 1256 1257 static int e752x_probe1(struct pci_dev *pdev, int dev_idx) 1258 { 1259 u16 pci_data; 1260 u8 stat8; 1261 struct mem_ctl_info *mci; 1262 struct edac_mc_layer layers[2]; 1263 struct e752x_pvt *pvt; 1264 u16 ddrcsr; 1265 int drc_chan; /* Number of channels 0=1chan,1=2chan */ 1266 struct e752x_error_info discard; 1267 1268 edac_dbg(0, "mci\n"); 1269 edac_dbg(0, "Starting Probe1\n"); 1270 1271 /* check to see if device 0 function 1 is enabled; if it isn't, we 1272 * assume the BIOS has reserved it for a reason and is expecting 1273 * exclusive access, we take care not to violate that assumption and 1274 * fail the probe. */ 1275 pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8); 1276 if (!force_function_unhide && !(stat8 & (1 << 5))) { 1277 printk(KERN_INFO "Contact your BIOS vendor to see if the " 1278 "E752x error registers can be safely un-hidden\n"); 1279 return -ENODEV; 1280 } 1281 stat8 |= (1 << 5); 1282 pci_write_config_byte(pdev, E752X_DEVPRES1, stat8); 1283 1284 pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr); 1285 /* FIXME: should check >>12 or 0xf, true for all? */ 1286 /* Dual channel = 1, Single channel = 0 */ 1287 drc_chan = dual_channel_active(ddrcsr); 1288 1289 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; 1290 layers[0].size = E752X_NR_CSROWS; 1291 layers[0].is_virt_csrow = true; 1292 layers[1].type = EDAC_MC_LAYER_CHANNEL; 1293 layers[1].size = drc_chan + 1; 1294 layers[1].is_virt_csrow = false; 1295 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt)); 1296 if (mci == NULL) 1297 return -ENOMEM; 1298 1299 edac_dbg(3, "init mci\n"); 1300 mci->mtype_cap = MEM_FLAG_RDDR; 1301 /* 3100 IMCH supports SECDEC only */ 1302 mci->edac_ctl_cap = (dev_idx == I3100) ? EDAC_FLAG_SECDED : 1303 (EDAC_FLAG_NONE | EDAC_FLAG_SECDED | EDAC_FLAG_S4ECD4ED); 1304 /* FIXME - what if different memory types are in different csrows? */ 1305 mci->mod_name = EDAC_MOD_STR; 1306 mci->mod_ver = E752X_REVISION; 1307 mci->pdev = &pdev->dev; 1308 1309 edac_dbg(3, "init pvt\n"); 1310 pvt = (struct e752x_pvt *)mci->pvt_info; 1311 pvt->dev_info = &e752x_devs[dev_idx]; 1312 pvt->mc_symmetric = ((ddrcsr & 0x10) != 0); 1313 1314 if (e752x_get_devs(pdev, dev_idx, pvt)) { 1315 edac_mc_free(mci); 1316 return -ENODEV; 1317 } 1318 1319 edac_dbg(3, "more mci init\n"); 1320 mci->ctl_name = pvt->dev_info->ctl_name; 1321 mci->dev_name = pci_name(pdev); 1322 mci->edac_check = e752x_check; 1323 mci->ctl_page_to_phys = ctl_page_to_phys; 1324 mci->set_sdram_scrub_rate = set_sdram_scrub_rate; 1325 mci->get_sdram_scrub_rate = get_sdram_scrub_rate; 1326 1327 /* set the map type. 1 = normal, 0 = reversed 1328 * Must be set before e752x_init_csrows in case csrow mapping 1329 * is reversed. 1330 */ 1331 pci_read_config_byte(pdev, E752X_DRM, &stat8); 1332 pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f)); 1333 1334 e752x_init_csrows(mci, pdev, ddrcsr); 1335 e752x_init_mem_map_table(pdev, pvt); 1336 1337 if (dev_idx == I3100) 1338 mci->edac_cap = EDAC_FLAG_SECDED; /* the only mode supported */ 1339 else 1340 mci->edac_cap |= EDAC_FLAG_NONE; 1341 edac_dbg(3, "tolm, remapbase, remaplimit\n"); 1342 1343 /* load the top of low memory, remap base, and remap limit vars */ 1344 pci_read_config_word(pdev, E752X_TOLM, &pci_data); 1345 pvt->tolm = ((u32) pci_data) << 4; 1346 pci_read_config_word(pdev, E752X_REMAPBASE, &pci_data); 1347 pvt->remapbase = ((u32) pci_data) << 14; 1348 pci_read_config_word(pdev, E752X_REMAPLIMIT, &pci_data); 1349 pvt->remaplimit = ((u32) pci_data) << 14; 1350 e752x_printk(KERN_INFO, 1351 "tolm = %x, remapbase = %x, remaplimit = %x\n", 1352 pvt->tolm, pvt->remapbase, pvt->remaplimit); 1353 1354 /* Here we assume that we will never see multiple instances of this 1355 * type of memory controller. The ID is therefore hardcoded to 0. 1356 */ 1357 if (edac_mc_add_mc(mci)) { 1358 edac_dbg(3, "failed edac_mc_add_mc()\n"); 1359 goto fail; 1360 } 1361 1362 e752x_init_error_reporting_regs(pvt); 1363 e752x_get_error_info(mci, &discard); /* clear other MCH errors */ 1364 1365 /* allocating generic PCI control info */ 1366 e752x_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR); 1367 if (!e752x_pci) { 1368 printk(KERN_WARNING 1369 "%s(): Unable to create PCI control\n", __func__); 1370 printk(KERN_WARNING 1371 "%s(): PCI error report via EDAC not setup\n", 1372 __func__); 1373 } 1374 1375 /* get this far and it's successful */ 1376 edac_dbg(3, "success\n"); 1377 return 0; 1378 1379 fail: 1380 pci_dev_put(pvt->dev_d0f0); 1381 pci_dev_put(pvt->dev_d0f1); 1382 edac_mc_free(mci); 1383 1384 return -ENODEV; 1385 } 1386 1387 /* returns count (>= 0), or negative on error */ 1388 static int e752x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 1389 { 1390 edac_dbg(0, "\n"); 1391 1392 /* wake up and enable device */ 1393 if (pci_enable_device(pdev) < 0) 1394 return -EIO; 1395 1396 return e752x_probe1(pdev, ent->driver_data); 1397 } 1398 1399 static void e752x_remove_one(struct pci_dev *pdev) 1400 { 1401 struct mem_ctl_info *mci; 1402 struct e752x_pvt *pvt; 1403 1404 edac_dbg(0, "\n"); 1405 1406 if (e752x_pci) 1407 edac_pci_release_generic_ctl(e752x_pci); 1408 1409 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL) 1410 return; 1411 1412 pvt = (struct e752x_pvt *)mci->pvt_info; 1413 pci_dev_put(pvt->dev_d0f0); 1414 pci_dev_put(pvt->dev_d0f1); 1415 edac_mc_free(mci); 1416 } 1417 1418 static const struct pci_device_id e752x_pci_tbl[] = { 1419 { 1420 PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1421 E7520}, 1422 { 1423 PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1424 E7525}, 1425 { 1426 PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1427 E7320}, 1428 { 1429 PCI_VEND_DEV(INTEL, 3100_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1430 I3100}, 1431 { 1432 0, 1433 } /* 0 terminated list. */ 1434 }; 1435 1436 MODULE_DEVICE_TABLE(pci, e752x_pci_tbl); 1437 1438 static struct pci_driver e752x_driver = { 1439 .name = EDAC_MOD_STR, 1440 .probe = e752x_init_one, 1441 .remove = e752x_remove_one, 1442 .id_table = e752x_pci_tbl, 1443 }; 1444 1445 static int __init e752x_init(void) 1446 { 1447 int pci_rc; 1448 1449 edac_dbg(3, "\n"); 1450 1451 /* Ensure that the OPSTATE is set correctly for POLL or NMI */ 1452 opstate_init(); 1453 1454 pci_rc = pci_register_driver(&e752x_driver); 1455 return (pci_rc < 0) ? pci_rc : 0; 1456 } 1457 1458 static void __exit e752x_exit(void) 1459 { 1460 edac_dbg(3, "\n"); 1461 pci_unregister_driver(&e752x_driver); 1462 } 1463 1464 module_init(e752x_init); 1465 module_exit(e752x_exit); 1466 1467 MODULE_LICENSE("GPL"); 1468 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n"); 1469 MODULE_DESCRIPTION("MC support for Intel e752x/3100 memory controllers"); 1470 1471 module_param(force_function_unhide, int, 0444); 1472 MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:" 1473 " 1=force unhide and hope BIOS doesn't fight driver for " 1474 "Dev0:Fun1 access"); 1475 1476 module_param(edac_op_state, int, 0444); 1477 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI"); 1478 1479 module_param(sysbus_parity, int, 0444); 1480 MODULE_PARM_DESC(sysbus_parity, "0=disable system bus parity checking," 1481 " 1=enable system bus parity checking, default=auto-detect"); 1482 module_param(report_non_memory_errors, int, 0644); 1483 MODULE_PARM_DESC(report_non_memory_errors, "0=disable non-memory error " 1484 "reporting, 1=enable non-memory error reporting"); 1485