1 /* 2 * Intel 5100 Memory Controllers kernel module 3 * 4 * This file may be distributed under the terms of the 5 * GNU General Public License. 6 * 7 * This module is based on the following document: 8 * 9 * Intel 5100X Chipset Memory Controller Hub (MCH) - Datasheet 10 * http://download.intel.com/design/chipsets/datashts/318378.pdf 11 * 12 * The intel 5100 has two independent channels. EDAC core currently 13 * can not reflect this configuration so instead the chip-select 14 * rows for each respective channel are layed out one after another, 15 * the first half belonging to channel 0, the second half belonging 16 * to channel 1. 17 */ 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/pci.h> 21 #include <linux/pci_ids.h> 22 #include <linux/edac.h> 23 #include <linux/delay.h> 24 #include <linux/mmzone.h> 25 26 #include "edac_core.h" 27 28 /* register addresses */ 29 30 /* device 16, func 1 */ 31 #define I5100_MC 0x40 /* Memory Control Register */ 32 #define I5100_MC_SCRBEN_MASK (1 << 7) 33 #define I5100_MC_SCRBDONE_MASK (1 << 4) 34 #define I5100_MS 0x44 /* Memory Status Register */ 35 #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */ 36 #define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */ 37 #define I5100_TOLM 0x6c /* Top of Low Memory */ 38 #define I5100_MIR0 0x80 /* Memory Interleave Range 0 */ 39 #define I5100_MIR1 0x84 /* Memory Interleave Range 1 */ 40 #define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */ 41 #define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */ 42 #define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */ 43 #define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16) 44 #define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15) 45 #define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14) 46 #define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12) 47 #define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11) 48 #define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10) 49 #define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6) 50 #define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5) 51 #define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4) 52 #define I5100_FERR_NF_MEM_M1ERR_MASK 1 53 #define I5100_FERR_NF_MEM_ANY_MASK \ 54 (I5100_FERR_NF_MEM_M16ERR_MASK | \ 55 I5100_FERR_NF_MEM_M15ERR_MASK | \ 56 I5100_FERR_NF_MEM_M14ERR_MASK | \ 57 I5100_FERR_NF_MEM_M12ERR_MASK | \ 58 I5100_FERR_NF_MEM_M11ERR_MASK | \ 59 I5100_FERR_NF_MEM_M10ERR_MASK | \ 60 I5100_FERR_NF_MEM_M6ERR_MASK | \ 61 I5100_FERR_NF_MEM_M5ERR_MASK | \ 62 I5100_FERR_NF_MEM_M4ERR_MASK | \ 63 I5100_FERR_NF_MEM_M1ERR_MASK) 64 #define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */ 65 #define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */ 66 67 /* device 21 and 22, func 0 */ 68 #define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */ 69 #define I5100_DMIR 0x15c /* DIMM Interleave Range */ 70 #define I5100_VALIDLOG 0x18c /* Valid Log Markers */ 71 #define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */ 72 #define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */ 73 #define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */ 74 #define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */ 75 #define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */ 76 #define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */ 77 #define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */ 78 79 /* bit field accessors */ 80 81 static inline u32 i5100_mc_scrben(u32 mc) 82 { 83 return mc >> 7 & 1; 84 } 85 86 static inline u32 i5100_mc_errdeten(u32 mc) 87 { 88 return mc >> 5 & 1; 89 } 90 91 static inline u32 i5100_mc_scrbdone(u32 mc) 92 { 93 return mc >> 4 & 1; 94 } 95 96 static inline u16 i5100_spddata_rdo(u16 a) 97 { 98 return a >> 15 & 1; 99 } 100 101 static inline u16 i5100_spddata_sbe(u16 a) 102 { 103 return a >> 13 & 1; 104 } 105 106 static inline u16 i5100_spddata_busy(u16 a) 107 { 108 return a >> 12 & 1; 109 } 110 111 static inline u16 i5100_spddata_data(u16 a) 112 { 113 return a & ((1 << 8) - 1); 114 } 115 116 static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba, 117 u32 data, u32 cmd) 118 { 119 return ((dti & ((1 << 4) - 1)) << 28) | 120 ((ckovrd & 1) << 27) | 121 ((sa & ((1 << 3) - 1)) << 24) | 122 ((ba & ((1 << 8) - 1)) << 16) | 123 ((data & ((1 << 8) - 1)) << 8) | 124 (cmd & 1); 125 } 126 127 static inline u16 i5100_tolm_tolm(u16 a) 128 { 129 return a >> 12 & ((1 << 4) - 1); 130 } 131 132 static inline u16 i5100_mir_limit(u16 a) 133 { 134 return a >> 4 & ((1 << 12) - 1); 135 } 136 137 static inline u16 i5100_mir_way1(u16 a) 138 { 139 return a >> 1 & 1; 140 } 141 142 static inline u16 i5100_mir_way0(u16 a) 143 { 144 return a & 1; 145 } 146 147 static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a) 148 { 149 return a >> 28 & 1; 150 } 151 152 static inline u32 i5100_ferr_nf_mem_any(u32 a) 153 { 154 return a & I5100_FERR_NF_MEM_ANY_MASK; 155 } 156 157 static inline u32 i5100_nerr_nf_mem_any(u32 a) 158 { 159 return i5100_ferr_nf_mem_any(a); 160 } 161 162 static inline u32 i5100_dmir_limit(u32 a) 163 { 164 return a >> 16 & ((1 << 11) - 1); 165 } 166 167 static inline u32 i5100_dmir_rank(u32 a, u32 i) 168 { 169 return a >> (4 * i) & ((1 << 2) - 1); 170 } 171 172 static inline u16 i5100_mtr_present(u16 a) 173 { 174 return a >> 10 & 1; 175 } 176 177 static inline u16 i5100_mtr_ethrottle(u16 a) 178 { 179 return a >> 9 & 1; 180 } 181 182 static inline u16 i5100_mtr_width(u16 a) 183 { 184 return a >> 8 & 1; 185 } 186 187 static inline u16 i5100_mtr_numbank(u16 a) 188 { 189 return a >> 6 & 1; 190 } 191 192 static inline u16 i5100_mtr_numrow(u16 a) 193 { 194 return a >> 2 & ((1 << 2) - 1); 195 } 196 197 static inline u16 i5100_mtr_numcol(u16 a) 198 { 199 return a & ((1 << 2) - 1); 200 } 201 202 203 static inline u32 i5100_validlog_redmemvalid(u32 a) 204 { 205 return a >> 2 & 1; 206 } 207 208 static inline u32 i5100_validlog_recmemvalid(u32 a) 209 { 210 return a >> 1 & 1; 211 } 212 213 static inline u32 i5100_validlog_nrecmemvalid(u32 a) 214 { 215 return a & 1; 216 } 217 218 static inline u32 i5100_nrecmema_merr(u32 a) 219 { 220 return a >> 15 & ((1 << 5) - 1); 221 } 222 223 static inline u32 i5100_nrecmema_bank(u32 a) 224 { 225 return a >> 12 & ((1 << 3) - 1); 226 } 227 228 static inline u32 i5100_nrecmema_rank(u32 a) 229 { 230 return a >> 8 & ((1 << 3) - 1); 231 } 232 233 static inline u32 i5100_nrecmema_dm_buf_id(u32 a) 234 { 235 return a & ((1 << 8) - 1); 236 } 237 238 static inline u32 i5100_nrecmemb_cas(u32 a) 239 { 240 return a >> 16 & ((1 << 13) - 1); 241 } 242 243 static inline u32 i5100_nrecmemb_ras(u32 a) 244 { 245 return a & ((1 << 16) - 1); 246 } 247 248 static inline u32 i5100_redmemb_ecc_locator(u32 a) 249 { 250 return a & ((1 << 18) - 1); 251 } 252 253 static inline u32 i5100_recmema_merr(u32 a) 254 { 255 return i5100_nrecmema_merr(a); 256 } 257 258 static inline u32 i5100_recmema_bank(u32 a) 259 { 260 return i5100_nrecmema_bank(a); 261 } 262 263 static inline u32 i5100_recmema_rank(u32 a) 264 { 265 return i5100_nrecmema_rank(a); 266 } 267 268 static inline u32 i5100_recmema_dm_buf_id(u32 a) 269 { 270 return i5100_nrecmema_dm_buf_id(a); 271 } 272 273 static inline u32 i5100_recmemb_cas(u32 a) 274 { 275 return i5100_nrecmemb_cas(a); 276 } 277 278 static inline u32 i5100_recmemb_ras(u32 a) 279 { 280 return i5100_nrecmemb_ras(a); 281 } 282 283 /* some generic limits */ 284 #define I5100_MAX_RANKS_PER_CHAN 6 285 #define I5100_CHANNELS 2 286 #define I5100_MAX_RANKS_PER_DIMM 4 287 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */ 288 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4 289 #define I5100_MAX_RANK_INTERLEAVE 4 290 #define I5100_MAX_DMIRS 5 291 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ) 292 293 struct i5100_priv { 294 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */ 295 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN]; 296 297 /* 298 * mainboard chip select map -- maps i5100 chip selects to 299 * DIMM slot chip selects. In the case of only 4 ranks per 300 * channel, the mapping is fairly obvious but not unique. 301 * we map -1 -> NC and assume both channels use the same 302 * map... 303 * 304 */ 305 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM]; 306 307 /* memory interleave range */ 308 struct { 309 u64 limit; 310 unsigned way[2]; 311 } mir[I5100_CHANNELS]; 312 313 /* adjusted memory interleave range register */ 314 unsigned amir[I5100_CHANNELS]; 315 316 /* dimm interleave range */ 317 struct { 318 unsigned rank[I5100_MAX_RANK_INTERLEAVE]; 319 u64 limit; 320 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS]; 321 322 /* memory technology registers... */ 323 struct { 324 unsigned present; /* 0 or 1 */ 325 unsigned ethrottle; /* 0 or 1 */ 326 unsigned width; /* 4 or 8 bits */ 327 unsigned numbank; /* 2 or 3 lines */ 328 unsigned numrow; /* 13 .. 16 lines */ 329 unsigned numcol; /* 11 .. 12 lines */ 330 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN]; 331 332 u64 tolm; /* top of low memory in bytes */ 333 unsigned ranksperchan; /* number of ranks per channel */ 334 335 struct pci_dev *mc; /* device 16 func 1 */ 336 struct pci_dev *ch0mm; /* device 21 func 0 */ 337 struct pci_dev *ch1mm; /* device 22 func 0 */ 338 339 struct delayed_work i5100_scrubbing; 340 int scrub_enable; 341 }; 342 343 /* map a rank/chan to a slot number on the mainboard */ 344 static int i5100_rank_to_slot(const struct mem_ctl_info *mci, 345 int chan, int rank) 346 { 347 const struct i5100_priv *priv = mci->pvt_info; 348 int i; 349 350 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) { 351 int j; 352 const int numrank = priv->dimm_numrank[chan][i]; 353 354 for (j = 0; j < numrank; j++) 355 if (priv->dimm_csmap[i][j] == rank) 356 return i * 2 + chan; 357 } 358 359 return -1; 360 } 361 362 static const char *i5100_err_msg(unsigned err) 363 { 364 static const char *merrs[] = { 365 "unknown", /* 0 */ 366 "uncorrectable data ECC on replay", /* 1 */ 367 "unknown", /* 2 */ 368 "unknown", /* 3 */ 369 "aliased uncorrectable demand data ECC", /* 4 */ 370 "aliased uncorrectable spare-copy data ECC", /* 5 */ 371 "aliased uncorrectable patrol data ECC", /* 6 */ 372 "unknown", /* 7 */ 373 "unknown", /* 8 */ 374 "unknown", /* 9 */ 375 "non-aliased uncorrectable demand data ECC", /* 10 */ 376 "non-aliased uncorrectable spare-copy data ECC", /* 11 */ 377 "non-aliased uncorrectable patrol data ECC", /* 12 */ 378 "unknown", /* 13 */ 379 "correctable demand data ECC", /* 14 */ 380 "correctable spare-copy data ECC", /* 15 */ 381 "correctable patrol data ECC", /* 16 */ 382 "unknown", /* 17 */ 383 "SPD protocol error", /* 18 */ 384 "unknown", /* 19 */ 385 "spare copy initiated", /* 20 */ 386 "spare copy completed", /* 21 */ 387 }; 388 unsigned i; 389 390 for (i = 0; i < ARRAY_SIZE(merrs); i++) 391 if (1 << i & err) 392 return merrs[i]; 393 394 return "none"; 395 } 396 397 /* convert csrow index into a rank (per channel -- 0..5) */ 398 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow) 399 { 400 const struct i5100_priv *priv = mci->pvt_info; 401 402 return csrow % priv->ranksperchan; 403 } 404 405 /* convert csrow index into a channel (0..1) */ 406 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow) 407 { 408 const struct i5100_priv *priv = mci->pvt_info; 409 410 return csrow / priv->ranksperchan; 411 } 412 413 static unsigned i5100_rank_to_csrow(const struct mem_ctl_info *mci, 414 int chan, int rank) 415 { 416 const struct i5100_priv *priv = mci->pvt_info; 417 418 return chan * priv->ranksperchan + rank; 419 } 420 421 static void i5100_handle_ce(struct mem_ctl_info *mci, 422 int chan, 423 unsigned bank, 424 unsigned rank, 425 unsigned long syndrome, 426 unsigned cas, 427 unsigned ras, 428 const char *msg) 429 { 430 const int csrow = i5100_rank_to_csrow(mci, chan, rank); 431 432 printk(KERN_ERR 433 "CE chan %d, bank %u, rank %u, syndrome 0x%lx, " 434 "cas %u, ras %u, csrow %u, label \"%s\": %s\n", 435 chan, bank, rank, syndrome, cas, ras, 436 csrow, mci->csrows[csrow].channels[0].label, msg); 437 438 mci->ce_count++; 439 mci->csrows[csrow].ce_count++; 440 mci->csrows[csrow].channels[0].ce_count++; 441 } 442 443 static void i5100_handle_ue(struct mem_ctl_info *mci, 444 int chan, 445 unsigned bank, 446 unsigned rank, 447 unsigned long syndrome, 448 unsigned cas, 449 unsigned ras, 450 const char *msg) 451 { 452 const int csrow = i5100_rank_to_csrow(mci, chan, rank); 453 454 printk(KERN_ERR 455 "UE chan %d, bank %u, rank %u, syndrome 0x%lx, " 456 "cas %u, ras %u, csrow %u, label \"%s\": %s\n", 457 chan, bank, rank, syndrome, cas, ras, 458 csrow, mci->csrows[csrow].channels[0].label, msg); 459 460 mci->ue_count++; 461 mci->csrows[csrow].ue_count++; 462 } 463 464 static void i5100_read_log(struct mem_ctl_info *mci, int chan, 465 u32 ferr, u32 nerr) 466 { 467 struct i5100_priv *priv = mci->pvt_info; 468 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm; 469 u32 dw; 470 u32 dw2; 471 unsigned syndrome = 0; 472 unsigned ecc_loc = 0; 473 unsigned merr; 474 unsigned bank; 475 unsigned rank; 476 unsigned cas; 477 unsigned ras; 478 479 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw); 480 481 if (i5100_validlog_redmemvalid(dw)) { 482 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2); 483 syndrome = dw2; 484 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2); 485 ecc_loc = i5100_redmemb_ecc_locator(dw2); 486 } 487 488 if (i5100_validlog_recmemvalid(dw)) { 489 const char *msg; 490 491 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2); 492 merr = i5100_recmema_merr(dw2); 493 bank = i5100_recmema_bank(dw2); 494 rank = i5100_recmema_rank(dw2); 495 496 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2); 497 cas = i5100_recmemb_cas(dw2); 498 ras = i5100_recmemb_ras(dw2); 499 500 /* FIXME: not really sure if this is what merr is... 501 */ 502 if (!merr) 503 msg = i5100_err_msg(ferr); 504 else 505 msg = i5100_err_msg(nerr); 506 507 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg); 508 } 509 510 if (i5100_validlog_nrecmemvalid(dw)) { 511 const char *msg; 512 513 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2); 514 merr = i5100_nrecmema_merr(dw2); 515 bank = i5100_nrecmema_bank(dw2); 516 rank = i5100_nrecmema_rank(dw2); 517 518 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2); 519 cas = i5100_nrecmemb_cas(dw2); 520 ras = i5100_nrecmemb_ras(dw2); 521 522 /* FIXME: not really sure if this is what merr is... 523 */ 524 if (!merr) 525 msg = i5100_err_msg(ferr); 526 else 527 msg = i5100_err_msg(nerr); 528 529 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg); 530 } 531 532 pci_write_config_dword(pdev, I5100_VALIDLOG, dw); 533 } 534 535 static void i5100_check_error(struct mem_ctl_info *mci) 536 { 537 struct i5100_priv *priv = mci->pvt_info; 538 u32 dw; 539 540 541 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw); 542 if (i5100_ferr_nf_mem_any(dw)) { 543 u32 dw2; 544 545 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2); 546 if (dw2) 547 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, 548 dw2); 549 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw); 550 551 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw), 552 i5100_ferr_nf_mem_any(dw), 553 i5100_nerr_nf_mem_any(dw2)); 554 } 555 } 556 557 /* The i5100 chipset will scrub the entire memory once, then 558 * set a done bit. Continuous scrubbing is achieved by enqueing 559 * delayed work to a workqueue, checking every few minutes if 560 * the scrubbing has completed and if so reinitiating it. 561 */ 562 563 static void i5100_refresh_scrubbing(struct work_struct *work) 564 { 565 struct delayed_work *i5100_scrubbing = container_of(work, 566 struct delayed_work, 567 work); 568 struct i5100_priv *priv = container_of(i5100_scrubbing, 569 struct i5100_priv, 570 i5100_scrubbing); 571 u32 dw; 572 573 pci_read_config_dword(priv->mc, I5100_MC, &dw); 574 575 if (priv->scrub_enable) { 576 577 pci_read_config_dword(priv->mc, I5100_MC, &dw); 578 579 if (i5100_mc_scrbdone(dw)) { 580 dw |= I5100_MC_SCRBEN_MASK; 581 pci_write_config_dword(priv->mc, I5100_MC, dw); 582 pci_read_config_dword(priv->mc, I5100_MC, &dw); 583 } 584 585 schedule_delayed_work(&(priv->i5100_scrubbing), 586 I5100_SCRUB_REFRESH_RATE); 587 } 588 } 589 /* 590 * The bandwidth is based on experimentation, feel free to refine it. 591 */ 592 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth) 593 { 594 struct i5100_priv *priv = mci->pvt_info; 595 u32 dw; 596 597 pci_read_config_dword(priv->mc, I5100_MC, &dw); 598 if (bandwidth) { 599 priv->scrub_enable = 1; 600 dw |= I5100_MC_SCRBEN_MASK; 601 schedule_delayed_work(&(priv->i5100_scrubbing), 602 I5100_SCRUB_REFRESH_RATE); 603 } else { 604 priv->scrub_enable = 0; 605 dw &= ~I5100_MC_SCRBEN_MASK; 606 cancel_delayed_work(&(priv->i5100_scrubbing)); 607 } 608 pci_write_config_dword(priv->mc, I5100_MC, dw); 609 610 pci_read_config_dword(priv->mc, I5100_MC, &dw); 611 612 bandwidth = 5900000 * i5100_mc_scrben(dw); 613 614 return bandwidth; 615 } 616 617 static int i5100_get_scrub_rate(struct mem_ctl_info *mci) 618 { 619 struct i5100_priv *priv = mci->pvt_info; 620 u32 dw; 621 622 pci_read_config_dword(priv->mc, I5100_MC, &dw); 623 624 return 5900000 * i5100_mc_scrben(dw); 625 } 626 627 static struct pci_dev *pci_get_device_func(unsigned vendor, 628 unsigned device, 629 unsigned func) 630 { 631 struct pci_dev *ret = NULL; 632 633 while (1) { 634 ret = pci_get_device(vendor, device, ret); 635 636 if (!ret) 637 break; 638 639 if (PCI_FUNC(ret->devfn) == func) 640 break; 641 } 642 643 return ret; 644 } 645 646 static unsigned long __devinit i5100_npages(struct mem_ctl_info *mci, 647 int csrow) 648 { 649 struct i5100_priv *priv = mci->pvt_info; 650 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow); 651 const unsigned chan = i5100_csrow_to_chan(mci, csrow); 652 unsigned addr_lines; 653 654 /* dimm present? */ 655 if (!priv->mtr[chan][chan_rank].present) 656 return 0ULL; 657 658 addr_lines = 659 I5100_DIMM_ADDR_LINES + 660 priv->mtr[chan][chan_rank].numcol + 661 priv->mtr[chan][chan_rank].numrow + 662 priv->mtr[chan][chan_rank].numbank; 663 664 return (unsigned long) 665 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE); 666 } 667 668 static void __devinit i5100_init_mtr(struct mem_ctl_info *mci) 669 { 670 struct i5100_priv *priv = mci->pvt_info; 671 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm }; 672 int i; 673 674 for (i = 0; i < I5100_CHANNELS; i++) { 675 int j; 676 struct pci_dev *pdev = mms[i]; 677 678 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) { 679 const unsigned addr = 680 (j < 4) ? I5100_MTR_0 + j * 2 : 681 I5100_MTR_4 + (j - 4) * 2; 682 u16 w; 683 684 pci_read_config_word(pdev, addr, &w); 685 686 priv->mtr[i][j].present = i5100_mtr_present(w); 687 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w); 688 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w); 689 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w); 690 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w); 691 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w); 692 } 693 } 694 } 695 696 /* 697 * FIXME: make this into a real i2c adapter (so that dimm-decode 698 * will work)? 699 */ 700 static int i5100_read_spd_byte(const struct mem_ctl_info *mci, 701 u8 ch, u8 slot, u8 addr, u8 *byte) 702 { 703 struct i5100_priv *priv = mci->pvt_info; 704 u16 w; 705 unsigned long et; 706 707 pci_read_config_word(priv->mc, I5100_SPDDATA, &w); 708 if (i5100_spddata_busy(w)) 709 return -1; 710 711 pci_write_config_dword(priv->mc, I5100_SPDCMD, 712 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr, 713 0, 0)); 714 715 /* wait up to 100ms */ 716 et = jiffies + HZ / 10; 717 udelay(100); 718 while (1) { 719 pci_read_config_word(priv->mc, I5100_SPDDATA, &w); 720 if (!i5100_spddata_busy(w)) 721 break; 722 udelay(100); 723 } 724 725 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w)) 726 return -1; 727 728 *byte = i5100_spddata_data(w); 729 730 return 0; 731 } 732 733 /* 734 * fill dimm chip select map 735 * 736 * FIXME: 737 * o not the only way to may chip selects to dimm slots 738 * o investigate if there is some way to obtain this map from the bios 739 */ 740 static void __devinit i5100_init_dimm_csmap(struct mem_ctl_info *mci) 741 { 742 struct i5100_priv *priv = mci->pvt_info; 743 int i; 744 745 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) { 746 int j; 747 748 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++) 749 priv->dimm_csmap[i][j] = -1; /* default NC */ 750 } 751 752 /* only 2 chip selects per slot... */ 753 if (priv->ranksperchan == 4) { 754 priv->dimm_csmap[0][0] = 0; 755 priv->dimm_csmap[0][1] = 3; 756 priv->dimm_csmap[1][0] = 1; 757 priv->dimm_csmap[1][1] = 2; 758 priv->dimm_csmap[2][0] = 2; 759 priv->dimm_csmap[3][0] = 3; 760 } else { 761 priv->dimm_csmap[0][0] = 0; 762 priv->dimm_csmap[0][1] = 1; 763 priv->dimm_csmap[1][0] = 2; 764 priv->dimm_csmap[1][1] = 3; 765 priv->dimm_csmap[2][0] = 4; 766 priv->dimm_csmap[2][1] = 5; 767 } 768 } 769 770 static void __devinit i5100_init_dimm_layout(struct pci_dev *pdev, 771 struct mem_ctl_info *mci) 772 { 773 struct i5100_priv *priv = mci->pvt_info; 774 int i; 775 776 for (i = 0; i < I5100_CHANNELS; i++) { 777 int j; 778 779 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) { 780 u8 rank; 781 782 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0) 783 priv->dimm_numrank[i][j] = 0; 784 else 785 priv->dimm_numrank[i][j] = (rank & 3) + 1; 786 } 787 } 788 789 i5100_init_dimm_csmap(mci); 790 } 791 792 static void __devinit i5100_init_interleaving(struct pci_dev *pdev, 793 struct mem_ctl_info *mci) 794 { 795 u16 w; 796 u32 dw; 797 struct i5100_priv *priv = mci->pvt_info; 798 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm }; 799 int i; 800 801 pci_read_config_word(pdev, I5100_TOLM, &w); 802 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024; 803 804 pci_read_config_word(pdev, I5100_MIR0, &w); 805 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28; 806 priv->mir[0].way[1] = i5100_mir_way1(w); 807 priv->mir[0].way[0] = i5100_mir_way0(w); 808 809 pci_read_config_word(pdev, I5100_MIR1, &w); 810 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28; 811 priv->mir[1].way[1] = i5100_mir_way1(w); 812 priv->mir[1].way[0] = i5100_mir_way0(w); 813 814 pci_read_config_word(pdev, I5100_AMIR_0, &w); 815 priv->amir[0] = w; 816 pci_read_config_word(pdev, I5100_AMIR_1, &w); 817 priv->amir[1] = w; 818 819 for (i = 0; i < I5100_CHANNELS; i++) { 820 int j; 821 822 for (j = 0; j < 5; j++) { 823 int k; 824 825 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw); 826 827 priv->dmir[i][j].limit = 828 (u64) i5100_dmir_limit(dw) << 28; 829 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++) 830 priv->dmir[i][j].rank[k] = 831 i5100_dmir_rank(dw, k); 832 } 833 } 834 835 i5100_init_mtr(mci); 836 } 837 838 static void __devinit i5100_init_csrows(struct mem_ctl_info *mci) 839 { 840 int i; 841 unsigned long total_pages = 0UL; 842 struct i5100_priv *priv = mci->pvt_info; 843 844 for (i = 0; i < mci->nr_csrows; i++) { 845 const unsigned long npages = i5100_npages(mci, i); 846 const unsigned chan = i5100_csrow_to_chan(mci, i); 847 const unsigned rank = i5100_csrow_to_rank(mci, i); 848 849 if (!npages) 850 continue; 851 852 /* 853 * FIXME: these two are totally bogus -- I don't see how to 854 * map them correctly to this structure... 855 */ 856 mci->csrows[i].first_page = total_pages; 857 mci->csrows[i].last_page = total_pages + npages - 1; 858 mci->csrows[i].page_mask = 0UL; 859 860 mci->csrows[i].nr_pages = npages; 861 mci->csrows[i].grain = 32; 862 mci->csrows[i].csrow_idx = i; 863 mci->csrows[i].dtype = 864 (priv->mtr[chan][rank].width == 4) ? DEV_X4 : DEV_X8; 865 mci->csrows[i].ue_count = 0; 866 mci->csrows[i].ce_count = 0; 867 mci->csrows[i].mtype = MEM_RDDR2; 868 mci->csrows[i].edac_mode = EDAC_SECDED; 869 mci->csrows[i].mci = mci; 870 mci->csrows[i].nr_channels = 1; 871 mci->csrows[i].channels[0].chan_idx = 0; 872 mci->csrows[i].channels[0].ce_count = 0; 873 mci->csrows[i].channels[0].csrow = mci->csrows + i; 874 snprintf(mci->csrows[i].channels[0].label, 875 sizeof(mci->csrows[i].channels[0].label), 876 "DIMM%u", i5100_rank_to_slot(mci, chan, rank)); 877 878 total_pages += npages; 879 } 880 } 881 882 static int __devinit i5100_init_one(struct pci_dev *pdev, 883 const struct pci_device_id *id) 884 { 885 int rc; 886 struct mem_ctl_info *mci; 887 struct i5100_priv *priv; 888 struct pci_dev *ch0mm, *ch1mm; 889 int ret = 0; 890 u32 dw; 891 int ranksperch; 892 893 if (PCI_FUNC(pdev->devfn) != 1) 894 return -ENODEV; 895 896 rc = pci_enable_device(pdev); 897 if (rc < 0) { 898 ret = rc; 899 goto bail; 900 } 901 902 /* ECC enabled? */ 903 pci_read_config_dword(pdev, I5100_MC, &dw); 904 if (!i5100_mc_errdeten(dw)) { 905 printk(KERN_INFO "i5100_edac: ECC not enabled.\n"); 906 ret = -ENODEV; 907 goto bail_pdev; 908 } 909 910 /* figure out how many ranks, from strapped state of 48GB_Mode input */ 911 pci_read_config_dword(pdev, I5100_MS, &dw); 912 ranksperch = !!(dw & (1 << 8)) * 2 + 4; 913 914 /* enable error reporting... */ 915 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw); 916 dw &= ~I5100_FERR_NF_MEM_ANY_MASK; 917 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw); 918 919 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */ 920 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL, 921 PCI_DEVICE_ID_INTEL_5100_21, 0); 922 if (!ch0mm) { 923 ret = -ENODEV; 924 goto bail_pdev; 925 } 926 927 rc = pci_enable_device(ch0mm); 928 if (rc < 0) { 929 ret = rc; 930 goto bail_ch0; 931 } 932 933 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */ 934 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL, 935 PCI_DEVICE_ID_INTEL_5100_22, 0); 936 if (!ch1mm) { 937 ret = -ENODEV; 938 goto bail_disable_ch0; 939 } 940 941 rc = pci_enable_device(ch1mm); 942 if (rc < 0) { 943 ret = rc; 944 goto bail_ch1; 945 } 946 947 mci = edac_mc_alloc(sizeof(*priv), ranksperch * 2, 1, 0); 948 if (!mci) { 949 ret = -ENOMEM; 950 goto bail_disable_ch1; 951 } 952 953 mci->dev = &pdev->dev; 954 955 priv = mci->pvt_info; 956 priv->ranksperchan = ranksperch; 957 priv->mc = pdev; 958 priv->ch0mm = ch0mm; 959 priv->ch1mm = ch1mm; 960 961 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing); 962 963 /* If scrubbing was already enabled by the bios, start maintaining it */ 964 pci_read_config_dword(pdev, I5100_MC, &dw); 965 if (i5100_mc_scrben(dw)) { 966 priv->scrub_enable = 1; 967 schedule_delayed_work(&(priv->i5100_scrubbing), 968 I5100_SCRUB_REFRESH_RATE); 969 } 970 971 i5100_init_dimm_layout(pdev, mci); 972 i5100_init_interleaving(pdev, mci); 973 974 mci->mtype_cap = MEM_FLAG_FB_DDR2; 975 mci->edac_ctl_cap = EDAC_FLAG_SECDED; 976 mci->edac_cap = EDAC_FLAG_SECDED; 977 mci->mod_name = "i5100_edac.c"; 978 mci->mod_ver = "not versioned"; 979 mci->ctl_name = "i5100"; 980 mci->dev_name = pci_name(pdev); 981 mci->ctl_page_to_phys = NULL; 982 983 mci->edac_check = i5100_check_error; 984 mci->set_sdram_scrub_rate = i5100_set_scrub_rate; 985 mci->get_sdram_scrub_rate = i5100_get_scrub_rate; 986 987 i5100_init_csrows(mci); 988 989 /* this strange construction seems to be in every driver, dunno why */ 990 switch (edac_op_state) { 991 case EDAC_OPSTATE_POLL: 992 case EDAC_OPSTATE_NMI: 993 break; 994 default: 995 edac_op_state = EDAC_OPSTATE_POLL; 996 break; 997 } 998 999 if (edac_mc_add_mc(mci)) { 1000 ret = -ENODEV; 1001 goto bail_scrub; 1002 } 1003 1004 return ret; 1005 1006 bail_scrub: 1007 priv->scrub_enable = 0; 1008 cancel_delayed_work_sync(&(priv->i5100_scrubbing)); 1009 edac_mc_free(mci); 1010 1011 bail_disable_ch1: 1012 pci_disable_device(ch1mm); 1013 1014 bail_ch1: 1015 pci_dev_put(ch1mm); 1016 1017 bail_disable_ch0: 1018 pci_disable_device(ch0mm); 1019 1020 bail_ch0: 1021 pci_dev_put(ch0mm); 1022 1023 bail_pdev: 1024 pci_disable_device(pdev); 1025 1026 bail: 1027 return ret; 1028 } 1029 1030 static void __devexit i5100_remove_one(struct pci_dev *pdev) 1031 { 1032 struct mem_ctl_info *mci; 1033 struct i5100_priv *priv; 1034 1035 mci = edac_mc_del_mc(&pdev->dev); 1036 1037 if (!mci) 1038 return; 1039 1040 priv = mci->pvt_info; 1041 1042 priv->scrub_enable = 0; 1043 cancel_delayed_work_sync(&(priv->i5100_scrubbing)); 1044 1045 pci_disable_device(pdev); 1046 pci_disable_device(priv->ch0mm); 1047 pci_disable_device(priv->ch1mm); 1048 pci_dev_put(priv->ch0mm); 1049 pci_dev_put(priv->ch1mm); 1050 1051 edac_mc_free(mci); 1052 } 1053 1054 static const struct pci_device_id i5100_pci_tbl[] __devinitdata = { 1055 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */ 1056 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) }, 1057 { 0, } 1058 }; 1059 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl); 1060 1061 static struct pci_driver i5100_driver = { 1062 .name = KBUILD_BASENAME, 1063 .probe = i5100_init_one, 1064 .remove = __devexit_p(i5100_remove_one), 1065 .id_table = i5100_pci_tbl, 1066 }; 1067 1068 static int __init i5100_init(void) 1069 { 1070 int pci_rc; 1071 1072 pci_rc = pci_register_driver(&i5100_driver); 1073 1074 return (pci_rc < 0) ? pci_rc : 0; 1075 } 1076 1077 static void __exit i5100_exit(void) 1078 { 1079 pci_unregister_driver(&i5100_driver); 1080 } 1081 1082 module_init(i5100_init); 1083 module_exit(i5100_exit); 1084 1085 MODULE_LICENSE("GPL"); 1086 MODULE_AUTHOR 1087 ("Arthur Jones <ajones@riverbed.com>"); 1088 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers"); 1089