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Linux 4.9.121
[linux/fpc-iii.git] / drivers / edac / i5100_edac.c
blobc655162caf08fe4a9f08dfe161a31543b6b9b1d5
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 #include "edac_module.h"
34
35 /* register addresses */
36
37 /* device 16, func 1 */
38 #define I5100_MC 0x40 /* Memory Control Register */
39 #define I5100_MC_SCRBEN_MASK (1 << 7)
40 #define I5100_MC_SCRBDONE_MASK (1 << 4)
41 #define I5100_MS 0x44 /* Memory Status Register */
42 #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */
43 #define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */
44 #define I5100_TOLM 0x6c /* Top of Low Memory */
45 #define I5100_MIR0 0x80 /* Memory Interleave Range 0 */
46 #define I5100_MIR1 0x84 /* Memory Interleave Range 1 */
47 #define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */
48 #define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */
49 #define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */
50 #define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16)
51 #define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15)
52 #define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14)
53 #define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12)
54 #define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11)
55 #define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10)
56 #define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6)
57 #define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5)
58 #define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4)
59 #define I5100_FERR_NF_MEM_M1ERR_MASK (1 << 1)
60 #define I5100_FERR_NF_MEM_ANY_MASK \
61 (I5100_FERR_NF_MEM_M16ERR_MASK | \
62 I5100_FERR_NF_MEM_M15ERR_MASK | \
63 I5100_FERR_NF_MEM_M14ERR_MASK | \
64 I5100_FERR_NF_MEM_M12ERR_MASK | \
65 I5100_FERR_NF_MEM_M11ERR_MASK | \
66 I5100_FERR_NF_MEM_M10ERR_MASK | \
67 I5100_FERR_NF_MEM_M6ERR_MASK | \
68 I5100_FERR_NF_MEM_M5ERR_MASK | \
69 I5100_FERR_NF_MEM_M4ERR_MASK | \
70 I5100_FERR_NF_MEM_M1ERR_MASK)
71 #define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */
72 #define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */
73 #define I5100_MEM0EINJMSK0 0x200 /* Injection Mask0 Register Channel 0 */
74 #define I5100_MEM1EINJMSK0 0x208 /* Injection Mask0 Register Channel 1 */
75 #define I5100_MEMXEINJMSK0_EINJEN (1 << 27)
76 #define I5100_MEM0EINJMSK1 0x204 /* Injection Mask1 Register Channel 0 */
77 #define I5100_MEM1EINJMSK1 0x206 /* Injection Mask1 Register Channel 1 */
78
79 /* Device 19, Function 0 */
80 #define I5100_DINJ0 0x9a
81
82 /* device 21 and 22, func 0 */
83 #define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */
84 #define I5100_DMIR 0x15c /* DIMM Interleave Range */
85 #define I5100_VALIDLOG 0x18c /* Valid Log Markers */
86 #define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */
87 #define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */
88 #define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */
89 #define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */
90 #define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */
91 #define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */
92 #define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */
93
94 /* bit field accessors */
95
96 static inline u32 i5100_mc_scrben(u32 mc)
97 {
98 return mc >> 7 & 1;
99 }
100
101 static inline u32 i5100_mc_errdeten(u32 mc)
102 {
103 return mc >> 5 & 1;
104 }
105
106 static inline u32 i5100_mc_scrbdone(u32 mc)
107 {
108 return mc >> 4 & 1;
109 }
110
111 static inline u16 i5100_spddata_rdo(u16 a)
112 {
113 return a >> 15 & 1;
114 }
115
116 static inline u16 i5100_spddata_sbe(u16 a)
117 {
118 return a >> 13 & 1;
119 }
120
121 static inline u16 i5100_spddata_busy(u16 a)
122 {
123 return a >> 12 & 1;
124 }
125
126 static inline u16 i5100_spddata_data(u16 a)
127 {
128 return a & ((1 << 8) - 1);
129 }
130
131 static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba,
132 u32 data, u32 cmd)
133 {
134 return ((dti & ((1 << 4) - 1)) << 28) |
135 ((ckovrd & 1) << 27) |
136 ((sa & ((1 << 3) - 1)) << 24) |
137 ((ba & ((1 << 8) - 1)) << 16) |
138 ((data & ((1 << 8) - 1)) << 8) |
139 (cmd & 1);
140 }
141
142 static inline u16 i5100_tolm_tolm(u16 a)
143 {
144 return a >> 12 & ((1 << 4) - 1);
145 }
146
147 static inline u16 i5100_mir_limit(u16 a)
148 {
149 return a >> 4 & ((1 << 12) - 1);
150 }
151
152 static inline u16 i5100_mir_way1(u16 a)
153 {
154 return a >> 1 & 1;
155 }
156
157 static inline u16 i5100_mir_way0(u16 a)
158 {
159 return a & 1;
160 }
161
162 static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a)
163 {
164 return a >> 28 & 1;
165 }
166
167 static inline u32 i5100_ferr_nf_mem_any(u32 a)
168 {
169 return a & I5100_FERR_NF_MEM_ANY_MASK;
170 }
171
172 static inline u32 i5100_nerr_nf_mem_any(u32 a)
173 {
174 return i5100_ferr_nf_mem_any(a);
175 }
176
177 static inline u32 i5100_dmir_limit(u32 a)
178 {
179 return a >> 16 & ((1 << 11) - 1);
180 }
181
182 static inline u32 i5100_dmir_rank(u32 a, u32 i)
183 {
184 return a >> (4 * i) & ((1 << 2) - 1);
185 }
186
187 static inline u16 i5100_mtr_present(u16 a)
188 {
189 return a >> 10 & 1;
190 }
191
192 static inline u16 i5100_mtr_ethrottle(u16 a)
193 {
194 return a >> 9 & 1;
195 }
196
197 static inline u16 i5100_mtr_width(u16 a)
198 {
199 return a >> 8 & 1;
200 }
201
202 static inline u16 i5100_mtr_numbank(u16 a)
203 {
204 return a >> 6 & 1;
205 }
206
207 static inline u16 i5100_mtr_numrow(u16 a)
208 {
209 return a >> 2 & ((1 << 2) - 1);
210 }
211
212 static inline u16 i5100_mtr_numcol(u16 a)
213 {
214 return a & ((1 << 2) - 1);
215 }
216
217
218 static inline u32 i5100_validlog_redmemvalid(u32 a)
219 {
220 return a >> 2 & 1;
221 }
222
223 static inline u32 i5100_validlog_recmemvalid(u32 a)
224 {
225 return a >> 1 & 1;
226 }
227
228 static inline u32 i5100_validlog_nrecmemvalid(u32 a)
229 {
230 return a & 1;
231 }
232
233 static inline u32 i5100_nrecmema_merr(u32 a)
234 {
235 return a >> 15 & ((1 << 5) - 1);
236 }
237
238 static inline u32 i5100_nrecmema_bank(u32 a)
239 {
240 return a >> 12 & ((1 << 3) - 1);
241 }
242
243 static inline u32 i5100_nrecmema_rank(u32 a)
244 {
245 return a >> 8 & ((1 << 3) - 1);
246 }
247
248 static inline u32 i5100_nrecmema_dm_buf_id(u32 a)
249 {
250 return a & ((1 << 8) - 1);
251 }
252
253 static inline u32 i5100_nrecmemb_cas(u32 a)
254 {
255 return a >> 16 & ((1 << 13) - 1);
256 }
257
258 static inline u32 i5100_nrecmemb_ras(u32 a)
259 {
260 return a & ((1 << 16) - 1);
261 }
262
263 static inline u32 i5100_redmemb_ecc_locator(u32 a)
264 {
265 return a & ((1 << 18) - 1);
266 }
267
268 static inline u32 i5100_recmema_merr(u32 a)
269 {
270 return i5100_nrecmema_merr(a);
271 }
272
273 static inline u32 i5100_recmema_bank(u32 a)
274 {
275 return i5100_nrecmema_bank(a);
276 }
277
278 static inline u32 i5100_recmema_rank(u32 a)
279 {
280 return i5100_nrecmema_rank(a);
281 }
282
283 static inline u32 i5100_recmemb_cas(u32 a)
284 {
285 return i5100_nrecmemb_cas(a);
286 }
287
288 static inline u32 i5100_recmemb_ras(u32 a)
289 {
290 return i5100_nrecmemb_ras(a);
291 }
292
293 /* some generic limits */
294 #define I5100_MAX_RANKS_PER_CHAN 6
295 #define I5100_CHANNELS 2
296 #define I5100_MAX_RANKS_PER_DIMM 4
297 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */
298 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4
299 #define I5100_MAX_RANK_INTERLEAVE 4
300 #define I5100_MAX_DMIRS 5
301 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ)
302
303 struct i5100_priv {
304 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */
305 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN];
306
307 /*
308 * mainboard chip select map -- maps i5100 chip selects to
309 * DIMM slot chip selects. In the case of only 4 ranks per
310 * channel, the mapping is fairly obvious but not unique.
311 * we map -1 -> NC and assume both channels use the same
312 * map...
313 *
314 */
315 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM];
316
317 /* memory interleave range */
318 struct {
319 u64 limit;
320 unsigned way[2];
321 } mir[I5100_CHANNELS];
322
323 /* adjusted memory interleave range register */
324 unsigned amir[I5100_CHANNELS];
325
326 /* dimm interleave range */
327 struct {
328 unsigned rank[I5100_MAX_RANK_INTERLEAVE];
329 u64 limit;
330 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS];
331
332 /* memory technology registers... */
333 struct {
334 unsigned present; /* 0 or 1 */
335 unsigned ethrottle; /* 0 or 1 */
336 unsigned width; /* 4 or 8 bits */
337 unsigned numbank; /* 2 or 3 lines */
338 unsigned numrow; /* 13 .. 16 lines */
339 unsigned numcol; /* 11 .. 12 lines */
340 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN];
341
342 u64 tolm; /* top of low memory in bytes */
343 unsigned ranksperchan; /* number of ranks per channel */
344
345 struct pci_dev *mc; /* device 16 func 1 */
346 struct pci_dev *einj; /* device 19 func 0 */
347 struct pci_dev *ch0mm; /* device 21 func 0 */
348 struct pci_dev *ch1mm; /* device 22 func 0 */
349
350 struct delayed_work i5100_scrubbing;
351 int scrub_enable;
352
353 /* Error injection */
354 u8 inject_channel;
355 u8 inject_hlinesel;
356 u8 inject_deviceptr1;
357 u8 inject_deviceptr2;
358 u16 inject_eccmask1;
359 u16 inject_eccmask2;
360
361 struct dentry *debugfs;
362 };
363
364 static struct dentry *i5100_debugfs;
365
366 /* map a rank/chan to a slot number on the mainboard */
367 static int i5100_rank_to_slot(const struct mem_ctl_info *mci,
368 int chan, int rank)
369 {
370 const struct i5100_priv *priv = mci->pvt_info;
371 int i;
372
373 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
374 int j;
375 const int numrank = priv->dimm_numrank[chan][i];
376
377 for (j = 0; j < numrank; j++)
378 if (priv->dimm_csmap[i][j] == rank)
379 return i * 2 + chan;
380 }
381
382 return -1;
383 }
384
385 static const char *i5100_err_msg(unsigned err)
386 {
387 static const char *merrs[] = {
388 "unknown", /* 0 */
389 "uncorrectable data ECC on replay", /* 1 */
390 "unknown", /* 2 */
391 "unknown", /* 3 */
392 "aliased uncorrectable demand data ECC", /* 4 */
393 "aliased uncorrectable spare-copy data ECC", /* 5 */
394 "aliased uncorrectable patrol data ECC", /* 6 */
395 "unknown", /* 7 */
396 "unknown", /* 8 */
397 "unknown", /* 9 */
398 "non-aliased uncorrectable demand data ECC", /* 10 */
399 "non-aliased uncorrectable spare-copy data ECC", /* 11 */
400 "non-aliased uncorrectable patrol data ECC", /* 12 */
401 "unknown", /* 13 */
402 "correctable demand data ECC", /* 14 */
403 "correctable spare-copy data ECC", /* 15 */
404 "correctable patrol data ECC", /* 16 */
405 "unknown", /* 17 */
406 "SPD protocol error", /* 18 */
407 "unknown", /* 19 */
408 "spare copy initiated", /* 20 */
409 "spare copy completed", /* 21 */
410 };
411 unsigned i;
412
413 for (i = 0; i < ARRAY_SIZE(merrs); i++)
414 if (1 << i & err)
415 return merrs[i];
416
417 return "none";
418 }
419
420 /* convert csrow index into a rank (per channel -- 0..5) */
421 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow)
422 {
423 const struct i5100_priv *priv = mci->pvt_info;
424
425 return csrow % priv->ranksperchan;
426 }
427
428 /* convert csrow index into a channel (0..1) */
429 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow)
430 {
431 const struct i5100_priv *priv = mci->pvt_info;
432
433 return csrow / priv->ranksperchan;
434 }
435
436 static void i5100_handle_ce(struct mem_ctl_info *mci,
437 int chan,
438 unsigned bank,
439 unsigned rank,
440 unsigned long syndrome,
441 unsigned cas,
442 unsigned ras,
443 const char *msg)
444 {
445 char detail[80];
446
447 /* Form out message */
448 snprintf(detail, sizeof(detail),
449 "bank %u, cas %u, ras %u\n",
450 bank, cas, ras);
451
452 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
453 0, 0, syndrome,
454 chan, rank, -1,
455 msg, detail);
456 }
457
458 static void i5100_handle_ue(struct mem_ctl_info *mci,
459 int chan,
460 unsigned bank,
461 unsigned rank,
462 unsigned long syndrome,
463 unsigned cas,
464 unsigned ras,
465 const char *msg)
466 {
467 char detail[80];
468
469 /* Form out message */
470 snprintf(detail, sizeof(detail),
471 "bank %u, cas %u, ras %u\n",
472 bank, cas, ras);
473
474 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
475 0, 0, syndrome,
476 chan, rank, -1,
477 msg, detail);
478 }
479
480 static void i5100_read_log(struct mem_ctl_info *mci, int chan,
481 u32 ferr, u32 nerr)
482 {
483 struct i5100_priv *priv = mci->pvt_info;
484 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm;
485 u32 dw;
486 u32 dw2;
487 unsigned syndrome = 0;
488 unsigned ecc_loc = 0;
489 unsigned merr;
490 unsigned bank;
491 unsigned rank;
492 unsigned cas;
493 unsigned ras;
494
495 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw);
496
497 if (i5100_validlog_redmemvalid(dw)) {
498 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2);
499 syndrome = dw2;
500 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2);
501 ecc_loc = i5100_redmemb_ecc_locator(dw2);
502 }
503
504 if (i5100_validlog_recmemvalid(dw)) {
505 const char *msg;
506
507 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2);
508 merr = i5100_recmema_merr(dw2);
509 bank = i5100_recmema_bank(dw2);
510 rank = i5100_recmema_rank(dw2);
511
512 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2);
513 cas = i5100_recmemb_cas(dw2);
514 ras = i5100_recmemb_ras(dw2);
515
516 /* FIXME: not really sure if this is what merr is...
517 */
518 if (!merr)
519 msg = i5100_err_msg(ferr);
520 else
521 msg = i5100_err_msg(nerr);
522
523 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg);
524 }
525
526 if (i5100_validlog_nrecmemvalid(dw)) {
527 const char *msg;
528
529 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2);
530 merr = i5100_nrecmema_merr(dw2);
531 bank = i5100_nrecmema_bank(dw2);
532 rank = i5100_nrecmema_rank(dw2);
533
534 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2);
535 cas = i5100_nrecmemb_cas(dw2);
536 ras = i5100_nrecmemb_ras(dw2);
537
538 /* FIXME: not really sure if this is what merr is...
539 */
540 if (!merr)
541 msg = i5100_err_msg(ferr);
542 else
543 msg = i5100_err_msg(nerr);
544
545 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg);
546 }
547
548 pci_write_config_dword(pdev, I5100_VALIDLOG, dw);
549 }
550
551 static void i5100_check_error(struct mem_ctl_info *mci)
552 {
553 struct i5100_priv *priv = mci->pvt_info;
554 u32 dw, dw2;
555
556 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw);
557 if (i5100_ferr_nf_mem_any(dw)) {
558
559 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2);
560
561 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw),
562 i5100_ferr_nf_mem_any(dw),
563 i5100_nerr_nf_mem_any(dw2));
564
565 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, dw2);
566 }
567 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw);
568 }
569
570 /* The i5100 chipset will scrub the entire memory once, then
571 * set a done bit. Continuous scrubbing is achieved by enqueing
572 * delayed work to a workqueue, checking every few minutes if
573 * the scrubbing has completed and if so reinitiating it.
574 */
575
576 static void i5100_refresh_scrubbing(struct work_struct *work)
577 {
578 struct delayed_work *i5100_scrubbing = to_delayed_work(work);
579 struct i5100_priv *priv = container_of(i5100_scrubbing,
580 struct i5100_priv,
581 i5100_scrubbing);
582 u32 dw;
583
584 pci_read_config_dword(priv->mc, I5100_MC, &dw);
585
586 if (priv->scrub_enable) {
587
588 pci_read_config_dword(priv->mc, I5100_MC, &dw);
589
590 if (i5100_mc_scrbdone(dw)) {
591 dw |= I5100_MC_SCRBEN_MASK;
592 pci_write_config_dword(priv->mc, I5100_MC, dw);
593 pci_read_config_dword(priv->mc, I5100_MC, &dw);
594 }
595
596 schedule_delayed_work(&(priv->i5100_scrubbing),
597 I5100_SCRUB_REFRESH_RATE);
598 }
599 }
600 /*
601 * The bandwidth is based on experimentation, feel free to refine it.
602 */
603 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth)
604 {
605 struct i5100_priv *priv = mci->pvt_info;
606 u32 dw;
607
608 pci_read_config_dword(priv->mc, I5100_MC, &dw);
609 if (bandwidth) {
610 priv->scrub_enable = 1;
611 dw |= I5100_MC_SCRBEN_MASK;
612 schedule_delayed_work(&(priv->i5100_scrubbing),
613 I5100_SCRUB_REFRESH_RATE);
614 } else {
615 priv->scrub_enable = 0;
616 dw &= ~I5100_MC_SCRBEN_MASK;
617 cancel_delayed_work(&(priv->i5100_scrubbing));
618 }
619 pci_write_config_dword(priv->mc, I5100_MC, dw);
620
621 pci_read_config_dword(priv->mc, I5100_MC, &dw);
622
623 bandwidth = 5900000 * i5100_mc_scrben(dw);
624
625 return bandwidth;
626 }
627
628 static int i5100_get_scrub_rate(struct mem_ctl_info *mci)
629 {
630 struct i5100_priv *priv = mci->pvt_info;
631 u32 dw;
632
633 pci_read_config_dword(priv->mc, I5100_MC, &dw);
634
635 return 5900000 * i5100_mc_scrben(dw);
636 }
637
638 static struct pci_dev *pci_get_device_func(unsigned vendor,
639 unsigned device,
640 unsigned func)
641 {
642 struct pci_dev *ret = NULL;
643
644 while (1) {
645 ret = pci_get_device(vendor, device, ret);
646
647 if (!ret)
648 break;
649
650 if (PCI_FUNC(ret->devfn) == func)
651 break;
652 }
653
654 return ret;
655 }
656
657 static unsigned long i5100_npages(struct mem_ctl_info *mci, int csrow)
658 {
659 struct i5100_priv *priv = mci->pvt_info;
660 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow);
661 const unsigned chan = i5100_csrow_to_chan(mci, csrow);
662 unsigned addr_lines;
663
664 /* dimm present? */
665 if (!priv->mtr[chan][chan_rank].present)
666 return 0ULL;
667
668 addr_lines =
669 I5100_DIMM_ADDR_LINES +
670 priv->mtr[chan][chan_rank].numcol +
671 priv->mtr[chan][chan_rank].numrow +
672 priv->mtr[chan][chan_rank].numbank;
673
674 return (unsigned long)
675 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE);
676 }
677
678 static void i5100_init_mtr(struct mem_ctl_info *mci)
679 {
680 struct i5100_priv *priv = mci->pvt_info;
681 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
682 int i;
683
684 for (i = 0; i < I5100_CHANNELS; i++) {
685 int j;
686 struct pci_dev *pdev = mms[i];
687
688 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) {
689 const unsigned addr =
690 (j < 4) ? I5100_MTR_0 + j * 2 :
691 I5100_MTR_4 + (j - 4) * 2;
692 u16 w;
693
694 pci_read_config_word(pdev, addr, &w);
695
696 priv->mtr[i][j].present = i5100_mtr_present(w);
697 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w);
698 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w);
699 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w);
700 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w);
701 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w);
702 }
703 }
704 }
705
706 /*
707 * FIXME: make this into a real i2c adapter (so that dimm-decode
708 * will work)?
709 */
710 static int i5100_read_spd_byte(const struct mem_ctl_info *mci,
711 u8 ch, u8 slot, u8 addr, u8 *byte)
712 {
713 struct i5100_priv *priv = mci->pvt_info;
714 u16 w;
715 unsigned long et;
716
717 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
718 if (i5100_spddata_busy(w))
719 return -1;
720
721 pci_write_config_dword(priv->mc, I5100_SPDCMD,
722 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr,
723 0, 0));
724
725 /* wait up to 100ms */
726 et = jiffies + HZ / 10;
727 udelay(100);
728 while (1) {
729 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
730 if (!i5100_spddata_busy(w))
731 break;
732 udelay(100);
733 }
734
735 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w))
736 return -1;
737
738 *byte = i5100_spddata_data(w);
739
740 return 0;
741 }
742
743 /*
744 * fill dimm chip select map
745 *
746 * FIXME:
747 * o not the only way to may chip selects to dimm slots
748 * o investigate if there is some way to obtain this map from the bios
749 */
750 static void i5100_init_dimm_csmap(struct mem_ctl_info *mci)
751 {
752 struct i5100_priv *priv = mci->pvt_info;
753 int i;
754
755 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
756 int j;
757
758 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++)
759 priv->dimm_csmap[i][j] = -1; /* default NC */
760 }
761
762 /* only 2 chip selects per slot... */
763 if (priv->ranksperchan == 4) {
764 priv->dimm_csmap[0][0] = 0;
765 priv->dimm_csmap[0][1] = 3;
766 priv->dimm_csmap[1][0] = 1;
767 priv->dimm_csmap[1][1] = 2;
768 priv->dimm_csmap[2][0] = 2;
769 priv->dimm_csmap[3][0] = 3;
770 } else {
771 priv->dimm_csmap[0][0] = 0;
772 priv->dimm_csmap[0][1] = 1;
773 priv->dimm_csmap[1][0] = 2;
774 priv->dimm_csmap[1][1] = 3;
775 priv->dimm_csmap[2][0] = 4;
776 priv->dimm_csmap[2][1] = 5;
777 }
778 }
779
780 static void i5100_init_dimm_layout(struct pci_dev *pdev,
781 struct mem_ctl_info *mci)
782 {
783 struct i5100_priv *priv = mci->pvt_info;
784 int i;
785
786 for (i = 0; i < I5100_CHANNELS; i++) {
787 int j;
788
789 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) {
790 u8 rank;
791
792 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0)
793 priv->dimm_numrank[i][j] = 0;
794 else
795 priv->dimm_numrank[i][j] = (rank & 3) + 1;
796 }
797 }
798
799 i5100_init_dimm_csmap(mci);
800 }
801
802 static void i5100_init_interleaving(struct pci_dev *pdev,
803 struct mem_ctl_info *mci)
804 {
805 u16 w;
806 u32 dw;
807 struct i5100_priv *priv = mci->pvt_info;
808 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
809 int i;
810
811 pci_read_config_word(pdev, I5100_TOLM, &w);
812 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024;
813
814 pci_read_config_word(pdev, I5100_MIR0, &w);
815 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28;
816 priv->mir[0].way[1] = i5100_mir_way1(w);
817 priv->mir[0].way[0] = i5100_mir_way0(w);
818
819 pci_read_config_word(pdev, I5100_MIR1, &w);
820 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28;
821 priv->mir[1].way[1] = i5100_mir_way1(w);
822 priv->mir[1].way[0] = i5100_mir_way0(w);
823
824 pci_read_config_word(pdev, I5100_AMIR_0, &w);
825 priv->amir[0] = w;
826 pci_read_config_word(pdev, I5100_AMIR_1, &w);
827 priv->amir[1] = w;
828
829 for (i = 0; i < I5100_CHANNELS; i++) {
830 int j;
831
832 for (j = 0; j < 5; j++) {
833 int k;
834
835 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw);
836
837 priv->dmir[i][j].limit =
838 (u64) i5100_dmir_limit(dw) << 28;
839 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++)
840 priv->dmir[i][j].rank[k] =
841 i5100_dmir_rank(dw, k);
842 }
843 }
844
845 i5100_init_mtr(mci);
846 }
847
848 static void i5100_init_csrows(struct mem_ctl_info *mci)
849 {
850 int i;
851 struct i5100_priv *priv = mci->pvt_info;
852
853 for (i = 0; i < mci->tot_dimms; i++) {
854 struct dimm_info *dimm;
855 const unsigned long npages = i5100_npages(mci, i);
856 const unsigned chan = i5100_csrow_to_chan(mci, i);
857 const unsigned rank = i5100_csrow_to_rank(mci, i);
858
859 if (!npages)
860 continue;
861
862 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
863 chan, rank, 0);
864
865 dimm->nr_pages = npages;
866 dimm->grain = 32;
867 dimm->dtype = (priv->mtr[chan][rank].width == 4) ?
868 DEV_X4 : DEV_X8;
869 dimm->mtype = MEM_RDDR2;
870 dimm->edac_mode = EDAC_SECDED;
871 snprintf(dimm->label, sizeof(dimm->label), "DIMM%u",
872 i5100_rank_to_slot(mci, chan, rank));
873
874 edac_dbg(2, "dimm channel %d, rank %d, size %ld\n",
875 chan, rank, (long)PAGES_TO_MiB(npages));
876 }
877 }
878
879 /****************************************************************************
880 * Error injection routines
881 ****************************************************************************/
882
883 static void i5100_do_inject(struct mem_ctl_info *mci)
884 {
885 struct i5100_priv *priv = mci->pvt_info;
886 u32 mask0;
887 u16 mask1;
888
889 /* MEM[1:0]EINJMSK0
890 * 31 - ADDRMATCHEN
891 * 29:28 - HLINESEL
892 * 00 Reserved
893 * 01 Lower half of cache line
894 * 10 Upper half of cache line
895 * 11 Both upper and lower parts of cache line
896 * 27 - EINJEN
897 * 25:19 - XORMASK1 for deviceptr1
898 * 9:5 - SEC2RAM for deviceptr2
899 * 4:0 - FIR2RAM for deviceptr1
900 */
901 mask0 = ((priv->inject_hlinesel & 0x3) << 28) |
902 I5100_MEMXEINJMSK0_EINJEN |
903 ((priv->inject_eccmask1 & 0xffff) << 10) |
904 ((priv->inject_deviceptr2 & 0x1f) << 5) |
905 (priv->inject_deviceptr1 & 0x1f);
906
907 /* MEM[1:0]EINJMSK1
908 * 15:0 - XORMASK2 for deviceptr2
909 */
910 mask1 = priv->inject_eccmask2;
911
912 if (priv->inject_channel == 0) {
913 pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0);
914 pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1);
915 } else {
916 pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0);
917 pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1);
918 }
919
920 /* Error Injection Response Function
921 * Intel 5100 Memory Controller Hub Chipset (318378) datasheet
922 * hints about this register but carry no data about them. All
923 * data regarding device 19 is based on experimentation and the
924 * Intel 7300 Chipset Memory Controller Hub (318082) datasheet
925 * which appears to be accurate for the i5100 in this area.
926 *
927 * The injection code don't work without setting this register.
928 * The register needs to be flipped off then on else the hardware
929 * will only preform the first injection.
930 *
931 * Stop condition bits 7:4
932 * 1010 - Stop after one injection
933 * 1011 - Never stop injecting faults
934 *
935 * Start condition bits 3:0
936 * 1010 - Never start
937 * 1011 - Start immediately
938 */
939 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa);
940 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab);
941 }
942
943 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
944 static ssize_t inject_enable_write(struct file *file, const char __user *data,
945 size_t count, loff_t *ppos)
946 {
947 struct device *dev = file->private_data;
948 struct mem_ctl_info *mci = to_mci(dev);
949
950 i5100_do_inject(mci);
951
952 return count;
953 }
954
955 static const struct file_operations i5100_inject_enable_fops = {
956 .open = simple_open,
957 .write = inject_enable_write,
958 .llseek = generic_file_llseek,
959 };
960
961 static int i5100_setup_debugfs(struct mem_ctl_info *mci)
962 {
963 struct i5100_priv *priv = mci->pvt_info;
964
965 if (!i5100_debugfs)
966 return -ENODEV;
967
968 priv->debugfs = edac_debugfs_create_dir_at(mci->bus->name, i5100_debugfs);
969
970 if (!priv->debugfs)
971 return -ENOMEM;
972
973 edac_debugfs_create_x8("inject_channel", S_IRUGO | S_IWUSR, priv->debugfs,
974 &priv->inject_channel);
975 edac_debugfs_create_x8("inject_hlinesel", S_IRUGO | S_IWUSR, priv->debugfs,
976 &priv->inject_hlinesel);
977 edac_debugfs_create_x8("inject_deviceptr1", S_IRUGO | S_IWUSR, priv->debugfs,
978 &priv->inject_deviceptr1);
979 edac_debugfs_create_x8("inject_deviceptr2", S_IRUGO | S_IWUSR, priv->debugfs,
980 &priv->inject_deviceptr2);
981 edac_debugfs_create_x16("inject_eccmask1", S_IRUGO | S_IWUSR, priv->debugfs,
982 &priv->inject_eccmask1);
983 edac_debugfs_create_x16("inject_eccmask2", S_IRUGO | S_IWUSR, priv->debugfs,
984 &priv->inject_eccmask2);
985 edac_debugfs_create_file("inject_enable", S_IWUSR, priv->debugfs,
986 &mci->dev, &i5100_inject_enable_fops);
987
988 return 0;
989
990 }
991
992 static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
993 {
994 int rc;
995 struct mem_ctl_info *mci;
996 struct edac_mc_layer layers[2];
997 struct i5100_priv *priv;
998 struct pci_dev *ch0mm, *ch1mm, *einj;
999 int ret = 0;
1000 u32 dw;
1001 int ranksperch;
1002
1003 if (PCI_FUNC(pdev->devfn) != 1)
1004 return -ENODEV;
1005
1006 rc = pci_enable_device(pdev);
1007 if (rc < 0) {
1008 ret = rc;
1009 goto bail;
1010 }
1011
1012 /* ECC enabled? */
1013 pci_read_config_dword(pdev, I5100_MC, &dw);
1014 if (!i5100_mc_errdeten(dw)) {
1015 printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
1016 ret = -ENODEV;
1017 goto bail_pdev;
1018 }
1019
1020 /* figure out how many ranks, from strapped state of 48GB_Mode input */
1021 pci_read_config_dword(pdev, I5100_MS, &dw);
1022 ranksperch = !!(dw & (1 << 8)) * 2 + 4;
1023
1024 /* enable error reporting... */
1025 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw);
1026 dw &= ~I5100_FERR_NF_MEM_ANY_MASK;
1027 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw);
1028
1029 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */
1030 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1031 PCI_DEVICE_ID_INTEL_5100_21, 0);
1032 if (!ch0mm) {
1033 ret = -ENODEV;
1034 goto bail_pdev;
1035 }
1036
1037 rc = pci_enable_device(ch0mm);
1038 if (rc < 0) {
1039 ret = rc;
1040 goto bail_ch0;
1041 }
1042
1043 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */
1044 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1045 PCI_DEVICE_ID_INTEL_5100_22, 0);
1046 if (!ch1mm) {
1047 ret = -ENODEV;
1048 goto bail_disable_ch0;
1049 }
1050
1051 rc = pci_enable_device(ch1mm);
1052 if (rc < 0) {
1053 ret = rc;
1054 goto bail_ch1;
1055 }
1056
1057 layers[0].type = EDAC_MC_LAYER_CHANNEL;
1058 layers[0].size = 2;
1059 layers[0].is_virt_csrow = false;
1060 layers[1].type = EDAC_MC_LAYER_SLOT;
1061 layers[1].size = ranksperch;
1062 layers[1].is_virt_csrow = true;
1063 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers,
1064 sizeof(*priv));
1065 if (!mci) {
1066 ret = -ENOMEM;
1067 goto bail_disable_ch1;
1068 }
1069
1070
1071 /* device 19, func 0, Error injection */
1072 einj = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1073 PCI_DEVICE_ID_INTEL_5100_19, 0);
1074 if (!einj) {
1075 ret = -ENODEV;
1076 goto bail_einj;
1077 }
1078
1079 rc = pci_enable_device(einj);
1080 if (rc < 0) {
1081 ret = rc;
1082 goto bail_disable_einj;
1083 }
1084
1085
1086 mci->pdev = &pdev->dev;
1087
1088 priv = mci->pvt_info;
1089 priv->ranksperchan = ranksperch;
1090 priv->mc = pdev;
1091 priv->ch0mm = ch0mm;
1092 priv->ch1mm = ch1mm;
1093 priv->einj = einj;
1094
1095 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing);
1096
1097 /* If scrubbing was already enabled by the bios, start maintaining it */
1098 pci_read_config_dword(pdev, I5100_MC, &dw);
1099 if (i5100_mc_scrben(dw)) {
1100 priv->scrub_enable = 1;
1101 schedule_delayed_work(&(priv->i5100_scrubbing),
1102 I5100_SCRUB_REFRESH_RATE);
1103 }
1104
1105 i5100_init_dimm_layout(pdev, mci);
1106 i5100_init_interleaving(pdev, mci);
1107
1108 mci->mtype_cap = MEM_FLAG_FB_DDR2;
1109 mci->edac_ctl_cap = EDAC_FLAG_SECDED;
1110 mci->edac_cap = EDAC_FLAG_SECDED;
1111 mci->mod_name = "i5100_edac.c";
1112 mci->mod_ver = "not versioned";
1113 mci->ctl_name = "i5100";
1114 mci->dev_name = pci_name(pdev);
1115 mci->ctl_page_to_phys = NULL;
1116
1117 mci->edac_check = i5100_check_error;
1118 mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
1119 mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
1120
1121 priv->inject_channel = 0;
1122 priv->inject_hlinesel = 0;
1123 priv->inject_deviceptr1 = 0;
1124 priv->inject_deviceptr2 = 0;
1125 priv->inject_eccmask1 = 0;
1126 priv->inject_eccmask2 = 0;
1127
1128 i5100_init_csrows(mci);
1129
1130 /* this strange construction seems to be in every driver, dunno why */
1131 switch (edac_op_state) {
1132 case EDAC_OPSTATE_POLL:
1133 case EDAC_OPSTATE_NMI:
1134 break;
1135 default:
1136 edac_op_state = EDAC_OPSTATE_POLL;
1137 break;
1138 }
1139
1140 if (edac_mc_add_mc(mci)) {
1141 ret = -ENODEV;
1142 goto bail_scrub;
1143 }
1144
1145 i5100_setup_debugfs(mci);
1146
1147 return ret;
1148
1149 bail_scrub:
1150 priv->scrub_enable = 0;
1151 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1152 edac_mc_free(mci);
1153
1154 bail_disable_einj:
1155 pci_disable_device(einj);
1156
1157 bail_einj:
1158 pci_dev_put(einj);
1159
1160 bail_disable_ch1:
1161 pci_disable_device(ch1mm);
1162
1163 bail_ch1:
1164 pci_dev_put(ch1mm);
1165
1166 bail_disable_ch0:
1167 pci_disable_device(ch0mm);
1168
1169 bail_ch0:
1170 pci_dev_put(ch0mm);
1171
1172 bail_pdev:
1173 pci_disable_device(pdev);
1174
1175 bail:
1176 return ret;
1177 }
1178
1179 static void i5100_remove_one(struct pci_dev *pdev)
1180 {
1181 struct mem_ctl_info *mci;
1182 struct i5100_priv *priv;
1183
1184 mci = edac_mc_del_mc(&pdev->dev);
1185
1186 if (!mci)
1187 return;
1188
1189 priv = mci->pvt_info;
1190
1191 edac_debugfs_remove_recursive(priv->debugfs);
1192
1193 priv->scrub_enable = 0;
1194 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1195
1196 pci_disable_device(pdev);
1197 pci_disable_device(priv->ch0mm);
1198 pci_disable_device(priv->ch1mm);
1199 pci_disable_device(priv->einj);
1200 pci_dev_put(priv->ch0mm);
1201 pci_dev_put(priv->ch1mm);
1202 pci_dev_put(priv->einj);
1203
1204 edac_mc_free(mci);
1205 }
1206
1207 static const struct pci_device_id i5100_pci_tbl[] = {
1208 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */
1209 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) },
1210 { 0, }
1211 };
1212 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl);
1213
1214 static struct pci_driver i5100_driver = {
1215 .name = KBUILD_BASENAME,
1216 .probe = i5100_init_one,
1217 .remove = i5100_remove_one,
1218 .id_table = i5100_pci_tbl,
1219 };
1220
1221 static int __init i5100_init(void)
1222 {
1223 int pci_rc;
1224
1225 i5100_debugfs = edac_debugfs_create_dir_at("i5100_edac", NULL);
1226
1227 pci_rc = pci_register_driver(&i5100_driver);
1228 return (pci_rc < 0) ? pci_rc : 0;
1229 }
1230
1231 static void __exit i5100_exit(void)
1232 {
1233 edac_debugfs_remove(i5100_debugfs);
1234
1235 pci_unregister_driver(&i5100_driver);
1236 }
1237
1238 module_init(i5100_init);
1239 module_exit(i5100_exit);
1240
1241 MODULE_LICENSE("GPL");
1242 MODULE_AUTHOR
1243 ("Arthur Jones <ajones@riverbed.com>");
1244 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers");
Linux with added FPC-III support