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[deliverable/linux.git] / drivers / edac / i5100_edac.c
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 laid out one after another,
15 * the first half belonging to channel 0, the second half belonging
16 * to channel 1.
17 *
18 * This driver is for DDR2 DIMMs, and it uses chip select to select among the
19 * several ranks. However, instead of showing memories as ranks, it outputs
20 * them as DIMM's. An internal table creates the association between ranks
21 * and DIMM's.
22 */
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/pci_ids.h>
27 #include <linux/edac.h>
28 #include <linux/delay.h>
29 #include <linux/mmzone.h>
30 #include <linux/debugfs.h>
31
32 #include "edac_core.h"
33
34 /* register addresses */
35
36 /* device 16, func 1 */
37 #define I5100_MC 0x40 /* Memory Control Register */
38 #define I5100_MC_SCRBEN_MASK (1 << 7)
39 #define I5100_MC_SCRBDONE_MASK (1 << 4)
40 #define I5100_MS 0x44 /* Memory Status Register */
41 #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */
42 #define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */
43 #define I5100_TOLM 0x6c /* Top of Low Memory */
44 #define I5100_MIR0 0x80 /* Memory Interleave Range 0 */
45 #define I5100_MIR1 0x84 /* Memory Interleave Range 1 */
46 #define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */
47 #define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */
48 #define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */
49 #define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16)
50 #define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15)
51 #define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14)
52 #define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12)
53 #define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11)
54 #define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10)
55 #define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6)
56 #define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5)
57 #define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4)
58 #define I5100_FERR_NF_MEM_M1ERR_MASK (1 << 1)
59 #define I5100_FERR_NF_MEM_ANY_MASK \
60 (I5100_FERR_NF_MEM_M16ERR_MASK | \
61 I5100_FERR_NF_MEM_M15ERR_MASK | \
62 I5100_FERR_NF_MEM_M14ERR_MASK | \
63 I5100_FERR_NF_MEM_M12ERR_MASK | \
64 I5100_FERR_NF_MEM_M11ERR_MASK | \
65 I5100_FERR_NF_MEM_M10ERR_MASK | \
66 I5100_FERR_NF_MEM_M6ERR_MASK | \
67 I5100_FERR_NF_MEM_M5ERR_MASK | \
68 I5100_FERR_NF_MEM_M4ERR_MASK | \
69 I5100_FERR_NF_MEM_M1ERR_MASK)
70 #define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */
71 #define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */
72 #define I5100_MEM0EINJMSK0 0x200 /* Injection Mask0 Register Channel 0 */
73 #define I5100_MEM1EINJMSK0 0x208 /* Injection Mask0 Register Channel 1 */
74 #define I5100_MEMXEINJMSK0_EINJEN (1 << 27)
75 #define I5100_MEM0EINJMSK1 0x204 /* Injection Mask1 Register Channel 0 */
76 #define I5100_MEM1EINJMSK1 0x206 /* Injection Mask1 Register Channel 1 */
77
78 /* Device 19, Function 0 */
79 #define I5100_DINJ0 0x9a
80
81 /* device 21 and 22, func 0 */
82 #define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */
83 #define I5100_DMIR 0x15c /* DIMM Interleave Range */
84 #define I5100_VALIDLOG 0x18c /* Valid Log Markers */
85 #define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */
86 #define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */
87 #define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */
88 #define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */
89 #define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */
90 #define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */
91 #define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */
92
93 /* bit field accessors */
94
95 static inline u32 i5100_mc_scrben(u32 mc)
96 {
97 return mc >> 7 & 1;
98 }
99
100 static inline u32 i5100_mc_errdeten(u32 mc)
101 {
102 return mc >> 5 & 1;
103 }
104
105 static inline u32 i5100_mc_scrbdone(u32 mc)
106 {
107 return mc >> 4 & 1;
108 }
109
110 static inline u16 i5100_spddata_rdo(u16 a)
111 {
112 return a >> 15 & 1;
113 }
114
115 static inline u16 i5100_spddata_sbe(u16 a)
116 {
117 return a >> 13 & 1;
118 }
119
120 static inline u16 i5100_spddata_busy(u16 a)
121 {
122 return a >> 12 & 1;
123 }
124
125 static inline u16 i5100_spddata_data(u16 a)
126 {
127 return a & ((1 << 8) - 1);
128 }
129
130 static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba,
131 u32 data, u32 cmd)
132 {
133 return ((dti & ((1 << 4) - 1)) << 28) |
134 ((ckovrd & 1) << 27) |
135 ((sa & ((1 << 3) - 1)) << 24) |
136 ((ba & ((1 << 8) - 1)) << 16) |
137 ((data & ((1 << 8) - 1)) << 8) |
138 (cmd & 1);
139 }
140
141 static inline u16 i5100_tolm_tolm(u16 a)
142 {
143 return a >> 12 & ((1 << 4) - 1);
144 }
145
146 static inline u16 i5100_mir_limit(u16 a)
147 {
148 return a >> 4 & ((1 << 12) - 1);
149 }
150
151 static inline u16 i5100_mir_way1(u16 a)
152 {
153 return a >> 1 & 1;
154 }
155
156 static inline u16 i5100_mir_way0(u16 a)
157 {
158 return a & 1;
159 }
160
161 static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a)
162 {
163 return a >> 28 & 1;
164 }
165
166 static inline u32 i5100_ferr_nf_mem_any(u32 a)
167 {
168 return a & I5100_FERR_NF_MEM_ANY_MASK;
169 }
170
171 static inline u32 i5100_nerr_nf_mem_any(u32 a)
172 {
173 return i5100_ferr_nf_mem_any(a);
174 }
175
176 static inline u32 i5100_dmir_limit(u32 a)
177 {
178 return a >> 16 & ((1 << 11) - 1);
179 }
180
181 static inline u32 i5100_dmir_rank(u32 a, u32 i)
182 {
183 return a >> (4 * i) & ((1 << 2) - 1);
184 }
185
186 static inline u16 i5100_mtr_present(u16 a)
187 {
188 return a >> 10 & 1;
189 }
190
191 static inline u16 i5100_mtr_ethrottle(u16 a)
192 {
193 return a >> 9 & 1;
194 }
195
196 static inline u16 i5100_mtr_width(u16 a)
197 {
198 return a >> 8 & 1;
199 }
200
201 static inline u16 i5100_mtr_numbank(u16 a)
202 {
203 return a >> 6 & 1;
204 }
205
206 static inline u16 i5100_mtr_numrow(u16 a)
207 {
208 return a >> 2 & ((1 << 2) - 1);
209 }
210
211 static inline u16 i5100_mtr_numcol(u16 a)
212 {
213 return a & ((1 << 2) - 1);
214 }
215
216
217 static inline u32 i5100_validlog_redmemvalid(u32 a)
218 {
219 return a >> 2 & 1;
220 }
221
222 static inline u32 i5100_validlog_recmemvalid(u32 a)
223 {
224 return a >> 1 & 1;
225 }
226
227 static inline u32 i5100_validlog_nrecmemvalid(u32 a)
228 {
229 return a & 1;
230 }
231
232 static inline u32 i5100_nrecmema_merr(u32 a)
233 {
234 return a >> 15 & ((1 << 5) - 1);
235 }
236
237 static inline u32 i5100_nrecmema_bank(u32 a)
238 {
239 return a >> 12 & ((1 << 3) - 1);
240 }
241
242 static inline u32 i5100_nrecmema_rank(u32 a)
243 {
244 return a >> 8 & ((1 << 3) - 1);
245 }
246
247 static inline u32 i5100_nrecmema_dm_buf_id(u32 a)
248 {
249 return a & ((1 << 8) - 1);
250 }
251
252 static inline u32 i5100_nrecmemb_cas(u32 a)
253 {
254 return a >> 16 & ((1 << 13) - 1);
255 }
256
257 static inline u32 i5100_nrecmemb_ras(u32 a)
258 {
259 return a & ((1 << 16) - 1);
260 }
261
262 static inline u32 i5100_redmemb_ecc_locator(u32 a)
263 {
264 return a & ((1 << 18) - 1);
265 }
266
267 static inline u32 i5100_recmema_merr(u32 a)
268 {
269 return i5100_nrecmema_merr(a);
270 }
271
272 static inline u32 i5100_recmema_bank(u32 a)
273 {
274 return i5100_nrecmema_bank(a);
275 }
276
277 static inline u32 i5100_recmema_rank(u32 a)
278 {
279 return i5100_nrecmema_rank(a);
280 }
281
282 static inline u32 i5100_recmema_dm_buf_id(u32 a)
283 {
284 return i5100_nrecmema_dm_buf_id(a);
285 }
286
287 static inline u32 i5100_recmemb_cas(u32 a)
288 {
289 return i5100_nrecmemb_cas(a);
290 }
291
292 static inline u32 i5100_recmemb_ras(u32 a)
293 {
294 return i5100_nrecmemb_ras(a);
295 }
296
297 /* some generic limits */
298 #define I5100_MAX_RANKS_PER_CHAN 6
299 #define I5100_CHANNELS 2
300 #define I5100_MAX_RANKS_PER_DIMM 4
301 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */
302 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4
303 #define I5100_MAX_RANK_INTERLEAVE 4
304 #define I5100_MAX_DMIRS 5
305 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ)
306
307 struct i5100_priv {
308 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */
309 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN];
310
311 /*
312 * mainboard chip select map -- maps i5100 chip selects to
313 * DIMM slot chip selects. In the case of only 4 ranks per
314 * channel, the mapping is fairly obvious but not unique.
315 * we map -1 -> NC and assume both channels use the same
316 * map...
317 *
318 */
319 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM];
320
321 /* memory interleave range */
322 struct {
323 u64 limit;
324 unsigned way[2];
325 } mir[I5100_CHANNELS];
326
327 /* adjusted memory interleave range register */
328 unsigned amir[I5100_CHANNELS];
329
330 /* dimm interleave range */
331 struct {
332 unsigned rank[I5100_MAX_RANK_INTERLEAVE];
333 u64 limit;
334 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS];
335
336 /* memory technology registers... */
337 struct {
338 unsigned present; /* 0 or 1 */
339 unsigned ethrottle; /* 0 or 1 */
340 unsigned width; /* 4 or 8 bits */
341 unsigned numbank; /* 2 or 3 lines */
342 unsigned numrow; /* 13 .. 16 lines */
343 unsigned numcol; /* 11 .. 12 lines */
344 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN];
345
346 u64 tolm; /* top of low memory in bytes */
347 unsigned ranksperchan; /* number of ranks per channel */
348
349 struct pci_dev *mc; /* device 16 func 1 */
350 struct pci_dev *einj; /* device 19 func 0 */
351 struct pci_dev *ch0mm; /* device 21 func 0 */
352 struct pci_dev *ch1mm; /* device 22 func 0 */
353
354 struct delayed_work i5100_scrubbing;
355 int scrub_enable;
356
357 /* Error injection */
358 u8 inject_channel;
359 u8 inject_hlinesel;
360 u8 inject_deviceptr1;
361 u8 inject_deviceptr2;
362 u16 inject_eccmask1;
363 u16 inject_eccmask2;
364
365 struct dentry *debugfs;
366 };
367
368 static struct dentry *i5100_debugfs;
369
370 /* map a rank/chan to a slot number on the mainboard */
371 static int i5100_rank_to_slot(const struct mem_ctl_info *mci,
372 int chan, int rank)
373 {
374 const struct i5100_priv *priv = mci->pvt_info;
375 int i;
376
377 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
378 int j;
379 const int numrank = priv->dimm_numrank[chan][i];
380
381 for (j = 0; j < numrank; j++)
382 if (priv->dimm_csmap[i][j] == rank)
383 return i * 2 + chan;
384 }
385
386 return -1;
387 }
388
389 static const char *i5100_err_msg(unsigned err)
390 {
391 static const char *merrs[] = {
392 "unknown", /* 0 */
393 "uncorrectable data ECC on replay", /* 1 */
394 "unknown", /* 2 */
395 "unknown", /* 3 */
396 "aliased uncorrectable demand data ECC", /* 4 */
397 "aliased uncorrectable spare-copy data ECC", /* 5 */
398 "aliased uncorrectable patrol data ECC", /* 6 */
399 "unknown", /* 7 */
400 "unknown", /* 8 */
401 "unknown", /* 9 */
402 "non-aliased uncorrectable demand data ECC", /* 10 */
403 "non-aliased uncorrectable spare-copy data ECC", /* 11 */
404 "non-aliased uncorrectable patrol data ECC", /* 12 */
405 "unknown", /* 13 */
406 "correctable demand data ECC", /* 14 */
407 "correctable spare-copy data ECC", /* 15 */
408 "correctable patrol data ECC", /* 16 */
409 "unknown", /* 17 */
410 "SPD protocol error", /* 18 */
411 "unknown", /* 19 */
412 "spare copy initiated", /* 20 */
413 "spare copy completed", /* 21 */
414 };
415 unsigned i;
416
417 for (i = 0; i < ARRAY_SIZE(merrs); i++)
418 if (1 << i & err)
419 return merrs[i];
420
421 return "none";
422 }
423
424 /* convert csrow index into a rank (per channel -- 0..5) */
425 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow)
426 {
427 const struct i5100_priv *priv = mci->pvt_info;
428
429 return csrow % priv->ranksperchan;
430 }
431
432 /* convert csrow index into a channel (0..1) */
433 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow)
434 {
435 const struct i5100_priv *priv = mci->pvt_info;
436
437 return csrow / priv->ranksperchan;
438 }
439
440 static void i5100_handle_ce(struct mem_ctl_info *mci,
441 int chan,
442 unsigned bank,
443 unsigned rank,
444 unsigned long syndrome,
445 unsigned cas,
446 unsigned ras,
447 const char *msg)
448 {
449 char detail[80];
450
451 /* Form out message */
452 snprintf(detail, sizeof(detail),
453 "bank %u, cas %u, ras %u\n",
454 bank, cas, ras);
455
456 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
457 0, 0, syndrome,
458 chan, rank, -1,
459 msg, detail);
460 }
461
462 static void i5100_handle_ue(struct mem_ctl_info *mci,
463 int chan,
464 unsigned bank,
465 unsigned rank,
466 unsigned long syndrome,
467 unsigned cas,
468 unsigned ras,
469 const char *msg)
470 {
471 char detail[80];
472
473 /* Form out message */
474 snprintf(detail, sizeof(detail),
475 "bank %u, cas %u, ras %u\n",
476 bank, cas, ras);
477
478 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
479 0, 0, syndrome,
480 chan, rank, -1,
481 msg, detail);
482 }
483
484 static void i5100_read_log(struct mem_ctl_info *mci, int chan,
485 u32 ferr, u32 nerr)
486 {
487 struct i5100_priv *priv = mci->pvt_info;
488 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm;
489 u32 dw;
490 u32 dw2;
491 unsigned syndrome = 0;
492 unsigned ecc_loc = 0;
493 unsigned merr;
494 unsigned bank;
495 unsigned rank;
496 unsigned cas;
497 unsigned ras;
498
499 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw);
500
501 if (i5100_validlog_redmemvalid(dw)) {
502 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2);
503 syndrome = dw2;
504 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2);
505 ecc_loc = i5100_redmemb_ecc_locator(dw2);
506 }
507
508 if (i5100_validlog_recmemvalid(dw)) {
509 const char *msg;
510
511 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2);
512 merr = i5100_recmema_merr(dw2);
513 bank = i5100_recmema_bank(dw2);
514 rank = i5100_recmema_rank(dw2);
515
516 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2);
517 cas = i5100_recmemb_cas(dw2);
518 ras = i5100_recmemb_ras(dw2);
519
520 /* FIXME: not really sure if this is what merr is...
521 */
522 if (!merr)
523 msg = i5100_err_msg(ferr);
524 else
525 msg = i5100_err_msg(nerr);
526
527 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg);
528 }
529
530 if (i5100_validlog_nrecmemvalid(dw)) {
531 const char *msg;
532
533 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2);
534 merr = i5100_nrecmema_merr(dw2);
535 bank = i5100_nrecmema_bank(dw2);
536 rank = i5100_nrecmema_rank(dw2);
537
538 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2);
539 cas = i5100_nrecmemb_cas(dw2);
540 ras = i5100_nrecmemb_ras(dw2);
541
542 /* FIXME: not really sure if this is what merr is...
543 */
544 if (!merr)
545 msg = i5100_err_msg(ferr);
546 else
547 msg = i5100_err_msg(nerr);
548
549 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg);
550 }
551
552 pci_write_config_dword(pdev, I5100_VALIDLOG, dw);
553 }
554
555 static void i5100_check_error(struct mem_ctl_info *mci)
556 {
557 struct i5100_priv *priv = mci->pvt_info;
558 u32 dw, dw2;
559
560 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw);
561 if (i5100_ferr_nf_mem_any(dw)) {
562
563 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2);
564
565 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw),
566 i5100_ferr_nf_mem_any(dw),
567 i5100_nerr_nf_mem_any(dw2));
568
569 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, dw2);
570 }
571 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw);
572 }
573
574 /* The i5100 chipset will scrub the entire memory once, then
575 * set a done bit. Continuous scrubbing is achieved by enqueing
576 * delayed work to a workqueue, checking every few minutes if
577 * the scrubbing has completed and if so reinitiating it.
578 */
579
580 static void i5100_refresh_scrubbing(struct work_struct *work)
581 {
582 struct delayed_work *i5100_scrubbing = container_of(work,
583 struct delayed_work,
584 work);
585 struct i5100_priv *priv = container_of(i5100_scrubbing,
586 struct i5100_priv,
587 i5100_scrubbing);
588 u32 dw;
589
590 pci_read_config_dword(priv->mc, I5100_MC, &dw);
591
592 if (priv->scrub_enable) {
593
594 pci_read_config_dword(priv->mc, I5100_MC, &dw);
595
596 if (i5100_mc_scrbdone(dw)) {
597 dw |= I5100_MC_SCRBEN_MASK;
598 pci_write_config_dword(priv->mc, I5100_MC, dw);
599 pci_read_config_dword(priv->mc, I5100_MC, &dw);
600 }
601
602 schedule_delayed_work(&(priv->i5100_scrubbing),
603 I5100_SCRUB_REFRESH_RATE);
604 }
605 }
606 /*
607 * The bandwidth is based on experimentation, feel free to refine it.
608 */
609 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth)
610 {
611 struct i5100_priv *priv = mci->pvt_info;
612 u32 dw;
613
614 pci_read_config_dword(priv->mc, I5100_MC, &dw);
615 if (bandwidth) {
616 priv->scrub_enable = 1;
617 dw |= I5100_MC_SCRBEN_MASK;
618 schedule_delayed_work(&(priv->i5100_scrubbing),
619 I5100_SCRUB_REFRESH_RATE);
620 } else {
621 priv->scrub_enable = 0;
622 dw &= ~I5100_MC_SCRBEN_MASK;
623 cancel_delayed_work(&(priv->i5100_scrubbing));
624 }
625 pci_write_config_dword(priv->mc, I5100_MC, dw);
626
627 pci_read_config_dword(priv->mc, I5100_MC, &dw);
628
629 bandwidth = 5900000 * i5100_mc_scrben(dw);
630
631 return bandwidth;
632 }
633
634 static int i5100_get_scrub_rate(struct mem_ctl_info *mci)
635 {
636 struct i5100_priv *priv = mci->pvt_info;
637 u32 dw;
638
639 pci_read_config_dword(priv->mc, I5100_MC, &dw);
640
641 return 5900000 * i5100_mc_scrben(dw);
642 }
643
644 static struct pci_dev *pci_get_device_func(unsigned vendor,
645 unsigned device,
646 unsigned func)
647 {
648 struct pci_dev *ret = NULL;
649
650 while (1) {
651 ret = pci_get_device(vendor, device, ret);
652
653 if (!ret)
654 break;
655
656 if (PCI_FUNC(ret->devfn) == func)
657 break;
658 }
659
660 return ret;
661 }
662
663 static unsigned long i5100_npages(struct mem_ctl_info *mci, int csrow)
664 {
665 struct i5100_priv *priv = mci->pvt_info;
666 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow);
667 const unsigned chan = i5100_csrow_to_chan(mci, csrow);
668 unsigned addr_lines;
669
670 /* dimm present? */
671 if (!priv->mtr[chan][chan_rank].present)
672 return 0ULL;
673
674 addr_lines =
675 I5100_DIMM_ADDR_LINES +
676 priv->mtr[chan][chan_rank].numcol +
677 priv->mtr[chan][chan_rank].numrow +
678 priv->mtr[chan][chan_rank].numbank;
679
680 return (unsigned long)
681 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE);
682 }
683
684 static void i5100_init_mtr(struct mem_ctl_info *mci)
685 {
686 struct i5100_priv *priv = mci->pvt_info;
687 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
688 int i;
689
690 for (i = 0; i < I5100_CHANNELS; i++) {
691 int j;
692 struct pci_dev *pdev = mms[i];
693
694 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) {
695 const unsigned addr =
696 (j < 4) ? I5100_MTR_0 + j * 2 :
697 I5100_MTR_4 + (j - 4) * 2;
698 u16 w;
699
700 pci_read_config_word(pdev, addr, &w);
701
702 priv->mtr[i][j].present = i5100_mtr_present(w);
703 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w);
704 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w);
705 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w);
706 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w);
707 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w);
708 }
709 }
710 }
711
712 /*
713 * FIXME: make this into a real i2c adapter (so that dimm-decode
714 * will work)?
715 */
716 static int i5100_read_spd_byte(const struct mem_ctl_info *mci,
717 u8 ch, u8 slot, u8 addr, u8 *byte)
718 {
719 struct i5100_priv *priv = mci->pvt_info;
720 u16 w;
721 unsigned long et;
722
723 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
724 if (i5100_spddata_busy(w))
725 return -1;
726
727 pci_write_config_dword(priv->mc, I5100_SPDCMD,
728 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr,
729 0, 0));
730
731 /* wait up to 100ms */
732 et = jiffies + HZ / 10;
733 udelay(100);
734 while (1) {
735 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
736 if (!i5100_spddata_busy(w))
737 break;
738 udelay(100);
739 }
740
741 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w))
742 return -1;
743
744 *byte = i5100_spddata_data(w);
745
746 return 0;
747 }
748
749 /*
750 * fill dimm chip select map
751 *
752 * FIXME:
753 * o not the only way to may chip selects to dimm slots
754 * o investigate if there is some way to obtain this map from the bios
755 */
756 static void i5100_init_dimm_csmap(struct mem_ctl_info *mci)
757 {
758 struct i5100_priv *priv = mci->pvt_info;
759 int i;
760
761 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
762 int j;
763
764 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++)
765 priv->dimm_csmap[i][j] = -1; /* default NC */
766 }
767
768 /* only 2 chip selects per slot... */
769 if (priv->ranksperchan == 4) {
770 priv->dimm_csmap[0][0] = 0;
771 priv->dimm_csmap[0][1] = 3;
772 priv->dimm_csmap[1][0] = 1;
773 priv->dimm_csmap[1][1] = 2;
774 priv->dimm_csmap[2][0] = 2;
775 priv->dimm_csmap[3][0] = 3;
776 } else {
777 priv->dimm_csmap[0][0] = 0;
778 priv->dimm_csmap[0][1] = 1;
779 priv->dimm_csmap[1][0] = 2;
780 priv->dimm_csmap[1][1] = 3;
781 priv->dimm_csmap[2][0] = 4;
782 priv->dimm_csmap[2][1] = 5;
783 }
784 }
785
786 static void i5100_init_dimm_layout(struct pci_dev *pdev,
787 struct mem_ctl_info *mci)
788 {
789 struct i5100_priv *priv = mci->pvt_info;
790 int i;
791
792 for (i = 0; i < I5100_CHANNELS; i++) {
793 int j;
794
795 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) {
796 u8 rank;
797
798 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0)
799 priv->dimm_numrank[i][j] = 0;
800 else
801 priv->dimm_numrank[i][j] = (rank & 3) + 1;
802 }
803 }
804
805 i5100_init_dimm_csmap(mci);
806 }
807
808 static void i5100_init_interleaving(struct pci_dev *pdev,
809 struct mem_ctl_info *mci)
810 {
811 u16 w;
812 u32 dw;
813 struct i5100_priv *priv = mci->pvt_info;
814 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
815 int i;
816
817 pci_read_config_word(pdev, I5100_TOLM, &w);
818 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024;
819
820 pci_read_config_word(pdev, I5100_MIR0, &w);
821 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28;
822 priv->mir[0].way[1] = i5100_mir_way1(w);
823 priv->mir[0].way[0] = i5100_mir_way0(w);
824
825 pci_read_config_word(pdev, I5100_MIR1, &w);
826 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28;
827 priv->mir[1].way[1] = i5100_mir_way1(w);
828 priv->mir[1].way[0] = i5100_mir_way0(w);
829
830 pci_read_config_word(pdev, I5100_AMIR_0, &w);
831 priv->amir[0] = w;
832 pci_read_config_word(pdev, I5100_AMIR_1, &w);
833 priv->amir[1] = w;
834
835 for (i = 0; i < I5100_CHANNELS; i++) {
836 int j;
837
838 for (j = 0; j < 5; j++) {
839 int k;
840
841 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw);
842
843 priv->dmir[i][j].limit =
844 (u64) i5100_dmir_limit(dw) << 28;
845 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++)
846 priv->dmir[i][j].rank[k] =
847 i5100_dmir_rank(dw, k);
848 }
849 }
850
851 i5100_init_mtr(mci);
852 }
853
854 static void i5100_init_csrows(struct mem_ctl_info *mci)
855 {
856 int i;
857 struct i5100_priv *priv = mci->pvt_info;
858
859 for (i = 0; i < mci->tot_dimms; i++) {
860 struct dimm_info *dimm;
861 const unsigned long npages = i5100_npages(mci, i);
862 const unsigned chan = i5100_csrow_to_chan(mci, i);
863 const unsigned rank = i5100_csrow_to_rank(mci, i);
864
865 if (!npages)
866 continue;
867
868 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
869 chan, rank, 0);
870
871 dimm->nr_pages = npages;
872 dimm->grain = 32;
873 dimm->dtype = (priv->mtr[chan][rank].width == 4) ?
874 DEV_X4 : DEV_X8;
875 dimm->mtype = MEM_RDDR2;
876 dimm->edac_mode = EDAC_SECDED;
877 snprintf(dimm->label, sizeof(dimm->label), "DIMM%u",
878 i5100_rank_to_slot(mci, chan, rank));
879
880 edac_dbg(2, "dimm channel %d, rank %d, size %ld\n",
881 chan, rank, (long)PAGES_TO_MiB(npages));
882 }
883 }
884
885 /****************************************************************************
886 * Error injection routines
887 ****************************************************************************/
888
889 static void i5100_do_inject(struct mem_ctl_info *mci)
890 {
891 struct i5100_priv *priv = mci->pvt_info;
892 u32 mask0;
893 u16 mask1;
894
895 /* MEM[1:0]EINJMSK0
896 * 31 - ADDRMATCHEN
897 * 29:28 - HLINESEL
898 * 00 Reserved
899 * 01 Lower half of cache line
900 * 10 Upper half of cache line
901 * 11 Both upper and lower parts of cache line
902 * 27 - EINJEN
903 * 25:19 - XORMASK1 for deviceptr1
904 * 9:5 - SEC2RAM for deviceptr2
905 * 4:0 - FIR2RAM for deviceptr1
906 */
907 mask0 = ((priv->inject_hlinesel & 0x3) << 28) |
908 I5100_MEMXEINJMSK0_EINJEN |
909 ((priv->inject_eccmask1 & 0xffff) << 10) |
910 ((priv->inject_deviceptr2 & 0x1f) << 5) |
911 (priv->inject_deviceptr1 & 0x1f);
912
913 /* MEM[1:0]EINJMSK1
914 * 15:0 - XORMASK2 for deviceptr2
915 */
916 mask1 = priv->inject_eccmask2;
917
918 if (priv->inject_channel == 0) {
919 pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0);
920 pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1);
921 } else {
922 pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0);
923 pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1);
924 }
925
926 /* Error Injection Response Function
927 * Intel 5100 Memory Controller Hub Chipset (318378) datasheet
928 * hints about this register but carry no data about them. All
929 * data regarding device 19 is based on experimentation and the
930 * Intel 7300 Chipset Memory Controller Hub (318082) datasheet
931 * which appears to be accurate for the i5100 in this area.
932 *
933 * The injection code don't work without setting this register.
934 * The register needs to be flipped off then on else the hardware
935 * will only preform the first injection.
936 *
937 * Stop condition bits 7:4
938 * 1010 - Stop after one injection
939 * 1011 - Never stop injecting faults
940 *
941 * Start condition bits 3:0
942 * 1010 - Never start
943 * 1011 - Start immediately
944 */
945 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa);
946 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab);
947 }
948
949 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
950 static ssize_t inject_enable_write(struct file *file, const char __user *data,
951 size_t count, loff_t *ppos)
952 {
953 struct device *dev = file->private_data;
954 struct mem_ctl_info *mci = to_mci(dev);
955
956 i5100_do_inject(mci);
957
958 return count;
959 }
960
961 static const struct file_operations i5100_inject_enable_fops = {
962 .open = simple_open,
963 .write = inject_enable_write,
964 .llseek = generic_file_llseek,
965 };
966
967 static int i5100_setup_debugfs(struct mem_ctl_info *mci)
968 {
969 struct i5100_priv *priv = mci->pvt_info;
970
971 if (!i5100_debugfs)
972 return -ENODEV;
973
974 priv->debugfs = debugfs_create_dir(mci->bus->name, i5100_debugfs);
975
976 if (!priv->debugfs)
977 return -ENOMEM;
978
979 debugfs_create_x8("inject_channel", S_IRUGO | S_IWUSR, priv->debugfs,
980 &priv->inject_channel);
981 debugfs_create_x8("inject_hlinesel", S_IRUGO | S_IWUSR, priv->debugfs,
982 &priv->inject_hlinesel);
983 debugfs_create_x8("inject_deviceptr1", S_IRUGO | S_IWUSR, priv->debugfs,
984 &priv->inject_deviceptr1);
985 debugfs_create_x8("inject_deviceptr2", S_IRUGO | S_IWUSR, priv->debugfs,
986 &priv->inject_deviceptr2);
987 debugfs_create_x16("inject_eccmask1", S_IRUGO | S_IWUSR, priv->debugfs,
988 &priv->inject_eccmask1);
989 debugfs_create_x16("inject_eccmask2", S_IRUGO | S_IWUSR, priv->debugfs,
990 &priv->inject_eccmask2);
991 debugfs_create_file("inject_enable", S_IWUSR, priv->debugfs,
992 &mci->dev, &i5100_inject_enable_fops);
993
994 return 0;
995
996 }
997
998 static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
999 {
1000 int rc;
1001 struct mem_ctl_info *mci;
1002 struct edac_mc_layer layers[2];
1003 struct i5100_priv *priv;
1004 struct pci_dev *ch0mm, *ch1mm, *einj;
1005 int ret = 0;
1006 u32 dw;
1007 int ranksperch;
1008
1009 if (PCI_FUNC(pdev->devfn) != 1)
1010 return -ENODEV;
1011
1012 rc = pci_enable_device(pdev);
1013 if (rc < 0) {
1014 ret = rc;
1015 goto bail;
1016 }
1017
1018 /* ECC enabled? */
1019 pci_read_config_dword(pdev, I5100_MC, &dw);
1020 if (!i5100_mc_errdeten(dw)) {
1021 printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
1022 ret = -ENODEV;
1023 goto bail_pdev;
1024 }
1025
1026 /* figure out how many ranks, from strapped state of 48GB_Mode input */
1027 pci_read_config_dword(pdev, I5100_MS, &dw);
1028 ranksperch = !!(dw & (1 << 8)) * 2 + 4;
1029
1030 /* enable error reporting... */
1031 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw);
1032 dw &= ~I5100_FERR_NF_MEM_ANY_MASK;
1033 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw);
1034
1035 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */
1036 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1037 PCI_DEVICE_ID_INTEL_5100_21, 0);
1038 if (!ch0mm) {
1039 ret = -ENODEV;
1040 goto bail_pdev;
1041 }
1042
1043 rc = pci_enable_device(ch0mm);
1044 if (rc < 0) {
1045 ret = rc;
1046 goto bail_ch0;
1047 }
1048
1049 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */
1050 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1051 PCI_DEVICE_ID_INTEL_5100_22, 0);
1052 if (!ch1mm) {
1053 ret = -ENODEV;
1054 goto bail_disable_ch0;
1055 }
1056
1057 rc = pci_enable_device(ch1mm);
1058 if (rc < 0) {
1059 ret = rc;
1060 goto bail_ch1;
1061 }
1062
1063 layers[0].type = EDAC_MC_LAYER_CHANNEL;
1064 layers[0].size = 2;
1065 layers[0].is_virt_csrow = false;
1066 layers[1].type = EDAC_MC_LAYER_SLOT;
1067 layers[1].size = ranksperch;
1068 layers[1].is_virt_csrow = true;
1069 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers,
1070 sizeof(*priv));
1071 if (!mci) {
1072 ret = -ENOMEM;
1073 goto bail_disable_ch1;
1074 }
1075
1076
1077 /* device 19, func 0, Error injection */
1078 einj = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1079 PCI_DEVICE_ID_INTEL_5100_19, 0);
1080 if (!einj) {
1081 ret = -ENODEV;
1082 goto bail_einj;
1083 }
1084
1085 rc = pci_enable_device(einj);
1086 if (rc < 0) {
1087 ret = rc;
1088 goto bail_disable_einj;
1089 }
1090
1091
1092 mci->pdev = &pdev->dev;
1093
1094 priv = mci->pvt_info;
1095 priv->ranksperchan = ranksperch;
1096 priv->mc = pdev;
1097 priv->ch0mm = ch0mm;
1098 priv->ch1mm = ch1mm;
1099 priv->einj = einj;
1100
1101 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing);
1102
1103 /* If scrubbing was already enabled by the bios, start maintaining it */
1104 pci_read_config_dword(pdev, I5100_MC, &dw);
1105 if (i5100_mc_scrben(dw)) {
1106 priv->scrub_enable = 1;
1107 schedule_delayed_work(&(priv->i5100_scrubbing),
1108 I5100_SCRUB_REFRESH_RATE);
1109 }
1110
1111 i5100_init_dimm_layout(pdev, mci);
1112 i5100_init_interleaving(pdev, mci);
1113
1114 mci->mtype_cap = MEM_FLAG_FB_DDR2;
1115 mci->edac_ctl_cap = EDAC_FLAG_SECDED;
1116 mci->edac_cap = EDAC_FLAG_SECDED;
1117 mci->mod_name = "i5100_edac.c";
1118 mci->mod_ver = "not versioned";
1119 mci->ctl_name = "i5100";
1120 mci->dev_name = pci_name(pdev);
1121 mci->ctl_page_to_phys = NULL;
1122
1123 mci->edac_check = i5100_check_error;
1124 mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
1125 mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
1126
1127 priv->inject_channel = 0;
1128 priv->inject_hlinesel = 0;
1129 priv->inject_deviceptr1 = 0;
1130 priv->inject_deviceptr2 = 0;
1131 priv->inject_eccmask1 = 0;
1132 priv->inject_eccmask2 = 0;
1133
1134 i5100_init_csrows(mci);
1135
1136 /* this strange construction seems to be in every driver, dunno why */
1137 switch (edac_op_state) {
1138 case EDAC_OPSTATE_POLL:
1139 case EDAC_OPSTATE_NMI:
1140 break;
1141 default:
1142 edac_op_state = EDAC_OPSTATE_POLL;
1143 break;
1144 }
1145
1146 if (edac_mc_add_mc(mci)) {
1147 ret = -ENODEV;
1148 goto bail_scrub;
1149 }
1150
1151 i5100_setup_debugfs(mci);
1152
1153 return ret;
1154
1155 bail_scrub:
1156 priv->scrub_enable = 0;
1157 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1158 edac_mc_free(mci);
1159
1160 bail_disable_einj:
1161 pci_disable_device(einj);
1162
1163 bail_einj:
1164 pci_dev_put(einj);
1165
1166 bail_disable_ch1:
1167 pci_disable_device(ch1mm);
1168
1169 bail_ch1:
1170 pci_dev_put(ch1mm);
1171
1172 bail_disable_ch0:
1173 pci_disable_device(ch0mm);
1174
1175 bail_ch0:
1176 pci_dev_put(ch0mm);
1177
1178 bail_pdev:
1179 pci_disable_device(pdev);
1180
1181 bail:
1182 return ret;
1183 }
1184
1185 static void i5100_remove_one(struct pci_dev *pdev)
1186 {
1187 struct mem_ctl_info *mci;
1188 struct i5100_priv *priv;
1189
1190 mci = edac_mc_del_mc(&pdev->dev);
1191
1192 if (!mci)
1193 return;
1194
1195 priv = mci->pvt_info;
1196
1197 debugfs_remove_recursive(priv->debugfs);
1198
1199 priv->scrub_enable = 0;
1200 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1201
1202 pci_disable_device(pdev);
1203 pci_disable_device(priv->ch0mm);
1204 pci_disable_device(priv->ch1mm);
1205 pci_disable_device(priv->einj);
1206 pci_dev_put(priv->ch0mm);
1207 pci_dev_put(priv->ch1mm);
1208 pci_dev_put(priv->einj);
1209
1210 edac_mc_free(mci);
1211 }
1212
1213 static const struct pci_device_id i5100_pci_tbl[] = {
1214 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */
1215 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) },
1216 { 0, }
1217 };
1218 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl);
1219
1220 static struct pci_driver i5100_driver = {
1221 .name = KBUILD_BASENAME,
1222 .probe = i5100_init_one,
1223 .remove = i5100_remove_one,
1224 .id_table = i5100_pci_tbl,
1225 };
1226
1227 static int __init i5100_init(void)
1228 {
1229 int pci_rc;
1230
1231 i5100_debugfs = debugfs_create_dir("i5100_edac", NULL);
1232
1233 pci_rc = pci_register_driver(&i5100_driver);
1234 return (pci_rc < 0) ? pci_rc : 0;
1235 }
1236
1237 static void __exit i5100_exit(void)
1238 {
1239 debugfs_remove(i5100_debugfs);
1240
1241 pci_unregister_driver(&i5100_driver);
1242 }
1243
1244 module_init(i5100_init);
1245 module_exit(i5100_exit);
1246
1247 MODULE_LICENSE("GPL");
1248 MODULE_AUTHOR
1249 ("Arthur Jones <ajones@riverbed.com>");
1250 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers");
Linux kernel - Deliverables
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