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dmaengine: imx-sdma: Let the core do the device node validation
[linux/fpc-iii.git] / drivers / edac / i5100_edac.c
blobb506eef6b146d8570f6dcba9be5205d96ad9e9f9
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_module.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_recmemb_cas(u32 a)
283 {
284 return i5100_nrecmemb_cas(a);
285 }
286
287 static inline u32 i5100_recmemb_ras(u32 a)
288 {
289 return i5100_nrecmemb_ras(a);
290 }
291
292 /* some generic limits */
293 #define I5100_MAX_RANKS_PER_CHAN 6
294 #define I5100_CHANNELS 2
295 #define I5100_MAX_RANKS_PER_DIMM 4
296 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */
297 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4
298 #define I5100_MAX_RANK_INTERLEAVE 4
299 #define I5100_MAX_DMIRS 5
300 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ)
301
302 struct i5100_priv {
303 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */
304 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN];
305
306 /*
307 * mainboard chip select map -- maps i5100 chip selects to
308 * DIMM slot chip selects. In the case of only 4 ranks per
309 * channel, the mapping is fairly obvious but not unique.
310 * we map -1 -> NC and assume both channels use the same
311 * map...
312 *
313 */
314 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM];
315
316 /* memory interleave range */
317 struct {
318 u64 limit;
319 unsigned way[2];
320 } mir[I5100_CHANNELS];
321
322 /* adjusted memory interleave range register */
323 unsigned amir[I5100_CHANNELS];
324
325 /* dimm interleave range */
326 struct {
327 unsigned rank[I5100_MAX_RANK_INTERLEAVE];
328 u64 limit;
329 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS];
330
331 /* memory technology registers... */
332 struct {
333 unsigned present; /* 0 or 1 */
334 unsigned ethrottle; /* 0 or 1 */
335 unsigned width; /* 4 or 8 bits */
336 unsigned numbank; /* 2 or 3 lines */
337 unsigned numrow; /* 13 .. 16 lines */
338 unsigned numcol; /* 11 .. 12 lines */
339 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN];
340
341 u64 tolm; /* top of low memory in bytes */
342 unsigned ranksperchan; /* number of ranks per channel */
343
344 struct pci_dev *mc; /* device 16 func 1 */
345 struct pci_dev *einj; /* device 19 func 0 */
346 struct pci_dev *ch0mm; /* device 21 func 0 */
347 struct pci_dev *ch1mm; /* device 22 func 0 */
348
349 struct delayed_work i5100_scrubbing;
350 int scrub_enable;
351
352 /* Error injection */
353 u8 inject_channel;
354 u8 inject_hlinesel;
355 u8 inject_deviceptr1;
356 u8 inject_deviceptr2;
357 u16 inject_eccmask1;
358 u16 inject_eccmask2;
359
360 struct dentry *debugfs;
361 };
362
363 static struct dentry *i5100_debugfs;
364
365 /* map a rank/chan to a slot number on the mainboard */
366 static int i5100_rank_to_slot(const struct mem_ctl_info *mci,
367 int chan, int rank)
368 {
369 const struct i5100_priv *priv = mci->pvt_info;
370 int i;
371
372 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
373 int j;
374 const int numrank = priv->dimm_numrank[chan][i];
375
376 for (j = 0; j < numrank; j++)
377 if (priv->dimm_csmap[i][j] == rank)
378 return i * 2 + chan;
379 }
380
381 return -1;
382 }
383
384 static const char *i5100_err_msg(unsigned err)
385 {
386 static const char *merrs[] = {
387 "unknown", /* 0 */
388 "uncorrectable data ECC on replay", /* 1 */
389 "unknown", /* 2 */
390 "unknown", /* 3 */
391 "aliased uncorrectable demand data ECC", /* 4 */
392 "aliased uncorrectable spare-copy data ECC", /* 5 */
393 "aliased uncorrectable patrol data ECC", /* 6 */
394 "unknown", /* 7 */
395 "unknown", /* 8 */
396 "unknown", /* 9 */
397 "non-aliased uncorrectable demand data ECC", /* 10 */
398 "non-aliased uncorrectable spare-copy data ECC", /* 11 */
399 "non-aliased uncorrectable patrol data ECC", /* 12 */
400 "unknown", /* 13 */
401 "correctable demand data ECC", /* 14 */
402 "correctable spare-copy data ECC", /* 15 */
403 "correctable patrol data ECC", /* 16 */
404 "unknown", /* 17 */
405 "SPD protocol error", /* 18 */
406 "unknown", /* 19 */
407 "spare copy initiated", /* 20 */
408 "spare copy completed", /* 21 */
409 };
410 unsigned i;
411
412 for (i = 0; i < ARRAY_SIZE(merrs); i++)
413 if (1 << i & err)
414 return merrs[i];
415
416 return "none";
417 }
418
419 /* convert csrow index into a rank (per channel -- 0..5) */
420 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow)
421 {
422 const struct i5100_priv *priv = mci->pvt_info;
423
424 return csrow % priv->ranksperchan;
425 }
426
427 /* convert csrow index into a channel (0..1) */
428 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow)
429 {
430 const struct i5100_priv *priv = mci->pvt_info;
431
432 return csrow / priv->ranksperchan;
433 }
434
435 static void i5100_handle_ce(struct mem_ctl_info *mci,
436 int chan,
437 unsigned bank,
438 unsigned rank,
439 unsigned long syndrome,
440 unsigned cas,
441 unsigned ras,
442 const char *msg)
443 {
444 char detail[80];
445
446 /* Form out message */
447 snprintf(detail, sizeof(detail),
448 "bank %u, cas %u, ras %u\n",
449 bank, cas, ras);
450
451 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
452 0, 0, syndrome,
453 chan, rank, -1,
454 msg, detail);
455 }
456
457 static void i5100_handle_ue(struct mem_ctl_info *mci,
458 int chan,
459 unsigned bank,
460 unsigned rank,
461 unsigned long syndrome,
462 unsigned cas,
463 unsigned ras,
464 const char *msg)
465 {
466 char detail[80];
467
468 /* Form out message */
469 snprintf(detail, sizeof(detail),
470 "bank %u, cas %u, ras %u\n",
471 bank, cas, ras);
472
473 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
474 0, 0, syndrome,
475 chan, rank, -1,
476 msg, detail);
477 }
478
479 static void i5100_read_log(struct mem_ctl_info *mci, int chan,
480 u32 ferr, u32 nerr)
481 {
482 struct i5100_priv *priv = mci->pvt_info;
483 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm;
484 u32 dw;
485 u32 dw2;
486 unsigned syndrome = 0;
487 unsigned ecc_loc = 0;
488 unsigned merr;
489 unsigned bank;
490 unsigned rank;
491 unsigned cas;
492 unsigned ras;
493
494 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw);
495
496 if (i5100_validlog_redmemvalid(dw)) {
497 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2);
498 syndrome = dw2;
499 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2);
500 ecc_loc = i5100_redmemb_ecc_locator(dw2);
501 }
502
503 if (i5100_validlog_recmemvalid(dw)) {
504 const char *msg;
505
506 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2);
507 merr = i5100_recmema_merr(dw2);
508 bank = i5100_recmema_bank(dw2);
509 rank = i5100_recmema_rank(dw2);
510
511 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2);
512 cas = i5100_recmemb_cas(dw2);
513 ras = i5100_recmemb_ras(dw2);
514
515 /* FIXME: not really sure if this is what merr is...
516 */
517 if (!merr)
518 msg = i5100_err_msg(ferr);
519 else
520 msg = i5100_err_msg(nerr);
521
522 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg);
523 }
524
525 if (i5100_validlog_nrecmemvalid(dw)) {
526 const char *msg;
527
528 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2);
529 merr = i5100_nrecmema_merr(dw2);
530 bank = i5100_nrecmema_bank(dw2);
531 rank = i5100_nrecmema_rank(dw2);
532
533 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2);
534 cas = i5100_nrecmemb_cas(dw2);
535 ras = i5100_nrecmemb_ras(dw2);
536
537 /* FIXME: not really sure if this is what merr is...
538 */
539 if (!merr)
540 msg = i5100_err_msg(ferr);
541 else
542 msg = i5100_err_msg(nerr);
543
544 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg);
545 }
546
547 pci_write_config_dword(pdev, I5100_VALIDLOG, dw);
548 }
549
550 static void i5100_check_error(struct mem_ctl_info *mci)
551 {
552 struct i5100_priv *priv = mci->pvt_info;
553 u32 dw, dw2;
554
555 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw);
556 if (i5100_ferr_nf_mem_any(dw)) {
557
558 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2);
559
560 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw),
561 i5100_ferr_nf_mem_any(dw),
562 i5100_nerr_nf_mem_any(dw2));
563
564 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, dw2);
565 }
566 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw);
567 }
568
569 /* The i5100 chipset will scrub the entire memory once, then
570 * set a done bit. Continuous scrubbing is achieved by enqueing
571 * delayed work to a workqueue, checking every few minutes if
572 * the scrubbing has completed and if so reinitiating it.
573 */
574
575 static void i5100_refresh_scrubbing(struct work_struct *work)
576 {
577 struct delayed_work *i5100_scrubbing = to_delayed_work(work);
578 struct i5100_priv *priv = container_of(i5100_scrubbing,
579 struct i5100_priv,
580 i5100_scrubbing);
581 u32 dw;
582
583 pci_read_config_dword(priv->mc, I5100_MC, &dw);
584
585 if (priv->scrub_enable) {
586
587 pci_read_config_dword(priv->mc, I5100_MC, &dw);
588
589 if (i5100_mc_scrbdone(dw)) {
590 dw |= I5100_MC_SCRBEN_MASK;
591 pci_write_config_dword(priv->mc, I5100_MC, dw);
592 pci_read_config_dword(priv->mc, I5100_MC, &dw);
593 }
594
595 schedule_delayed_work(&(priv->i5100_scrubbing),
596 I5100_SCRUB_REFRESH_RATE);
597 }
598 }
599 /*
600 * The bandwidth is based on experimentation, feel free to refine it.
601 */
602 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth)
603 {
604 struct i5100_priv *priv = mci->pvt_info;
605 u32 dw;
606
607 pci_read_config_dword(priv->mc, I5100_MC, &dw);
608 if (bandwidth) {
609 priv->scrub_enable = 1;
610 dw |= I5100_MC_SCRBEN_MASK;
611 schedule_delayed_work(&(priv->i5100_scrubbing),
612 I5100_SCRUB_REFRESH_RATE);
613 } else {
614 priv->scrub_enable = 0;
615 dw &= ~I5100_MC_SCRBEN_MASK;
616 cancel_delayed_work(&(priv->i5100_scrubbing));
617 }
618 pci_write_config_dword(priv->mc, I5100_MC, dw);
619
620 pci_read_config_dword(priv->mc, I5100_MC, &dw);
621
622 bandwidth = 5900000 * i5100_mc_scrben(dw);
623
624 return bandwidth;
625 }
626
627 static int i5100_get_scrub_rate(struct mem_ctl_info *mci)
628 {
629 struct i5100_priv *priv = mci->pvt_info;
630 u32 dw;
631
632 pci_read_config_dword(priv->mc, I5100_MC, &dw);
633
634 return 5900000 * i5100_mc_scrben(dw);
635 }
636
637 static struct pci_dev *pci_get_device_func(unsigned vendor,
638 unsigned device,
639 unsigned func)
640 {
641 struct pci_dev *ret = NULL;
642
643 while (1) {
644 ret = pci_get_device(vendor, device, ret);
645
646 if (!ret)
647 break;
648
649 if (PCI_FUNC(ret->devfn) == func)
650 break;
651 }
652
653 return ret;
654 }
655
656 static unsigned long i5100_npages(struct mem_ctl_info *mci, int csrow)
657 {
658 struct i5100_priv *priv = mci->pvt_info;
659 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow);
660 const unsigned chan = i5100_csrow_to_chan(mci, csrow);
661 unsigned addr_lines;
662
663 /* dimm present? */
664 if (!priv->mtr[chan][chan_rank].present)
665 return 0ULL;
666
667 addr_lines =
668 I5100_DIMM_ADDR_LINES +
669 priv->mtr[chan][chan_rank].numcol +
670 priv->mtr[chan][chan_rank].numrow +
671 priv->mtr[chan][chan_rank].numbank;
672
673 return (unsigned long)
674 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE);
675 }
676
677 static void i5100_init_mtr(struct mem_ctl_info *mci)
678 {
679 struct i5100_priv *priv = mci->pvt_info;
680 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
681 int i;
682
683 for (i = 0; i < I5100_CHANNELS; i++) {
684 int j;
685 struct pci_dev *pdev = mms[i];
686
687 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) {
688 const unsigned addr =
689 (j < 4) ? I5100_MTR_0 + j * 2 :
690 I5100_MTR_4 + (j - 4) * 2;
691 u16 w;
692
693 pci_read_config_word(pdev, addr, &w);
694
695 priv->mtr[i][j].present = i5100_mtr_present(w);
696 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w);
697 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w);
698 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w);
699 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w);
700 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w);
701 }
702 }
703 }
704
705 /*
706 * FIXME: make this into a real i2c adapter (so that dimm-decode
707 * will work)?
708 */
709 static int i5100_read_spd_byte(const struct mem_ctl_info *mci,
710 u8 ch, u8 slot, u8 addr, u8 *byte)
711 {
712 struct i5100_priv *priv = mci->pvt_info;
713 u16 w;
714 unsigned long et;
715
716 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
717 if (i5100_spddata_busy(w))
718 return -1;
719
720 pci_write_config_dword(priv->mc, I5100_SPDCMD,
721 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr,
722 0, 0));
723
724 /* wait up to 100ms */
725 et = jiffies + HZ / 10;
726 udelay(100);
727 while (1) {
728 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
729 if (!i5100_spddata_busy(w))
730 break;
731 udelay(100);
732 }
733
734 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w))
735 return -1;
736
737 *byte = i5100_spddata_data(w);
738
739 return 0;
740 }
741
742 /*
743 * fill dimm chip select map
744 *
745 * FIXME:
746 * o not the only way to may chip selects to dimm slots
747 * o investigate if there is some way to obtain this map from the bios
748 */
749 static void i5100_init_dimm_csmap(struct mem_ctl_info *mci)
750 {
751 struct i5100_priv *priv = mci->pvt_info;
752 int i;
753
754 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
755 int j;
756
757 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++)
758 priv->dimm_csmap[i][j] = -1; /* default NC */
759 }
760
761 /* only 2 chip selects per slot... */
762 if (priv->ranksperchan == 4) {
763 priv->dimm_csmap[0][0] = 0;
764 priv->dimm_csmap[0][1] = 3;
765 priv->dimm_csmap[1][0] = 1;
766 priv->dimm_csmap[1][1] = 2;
767 priv->dimm_csmap[2][0] = 2;
768 priv->dimm_csmap[3][0] = 3;
769 } else {
770 priv->dimm_csmap[0][0] = 0;
771 priv->dimm_csmap[0][1] = 1;
772 priv->dimm_csmap[1][0] = 2;
773 priv->dimm_csmap[1][1] = 3;
774 priv->dimm_csmap[2][0] = 4;
775 priv->dimm_csmap[2][1] = 5;
776 }
777 }
778
779 static void i5100_init_dimm_layout(struct pci_dev *pdev,
780 struct mem_ctl_info *mci)
781 {
782 struct i5100_priv *priv = mci->pvt_info;
783 int i;
784
785 for (i = 0; i < I5100_CHANNELS; i++) {
786 int j;
787
788 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) {
789 u8 rank;
790
791 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0)
792 priv->dimm_numrank[i][j] = 0;
793 else
794 priv->dimm_numrank[i][j] = (rank & 3) + 1;
795 }
796 }
797
798 i5100_init_dimm_csmap(mci);
799 }
800
801 static void i5100_init_interleaving(struct pci_dev *pdev,
802 struct mem_ctl_info *mci)
803 {
804 u16 w;
805 u32 dw;
806 struct i5100_priv *priv = mci->pvt_info;
807 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
808 int i;
809
810 pci_read_config_word(pdev, I5100_TOLM, &w);
811 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024;
812
813 pci_read_config_word(pdev, I5100_MIR0, &w);
814 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28;
815 priv->mir[0].way[1] = i5100_mir_way1(w);
816 priv->mir[0].way[0] = i5100_mir_way0(w);
817
818 pci_read_config_word(pdev, I5100_MIR1, &w);
819 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28;
820 priv->mir[1].way[1] = i5100_mir_way1(w);
821 priv->mir[1].way[0] = i5100_mir_way0(w);
822
823 pci_read_config_word(pdev, I5100_AMIR_0, &w);
824 priv->amir[0] = w;
825 pci_read_config_word(pdev, I5100_AMIR_1, &w);
826 priv->amir[1] = w;
827
828 for (i = 0; i < I5100_CHANNELS; i++) {
829 int j;
830
831 for (j = 0; j < 5; j++) {
832 int k;
833
834 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw);
835
836 priv->dmir[i][j].limit =
837 (u64) i5100_dmir_limit(dw) << 28;
838 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++)
839 priv->dmir[i][j].rank[k] =
840 i5100_dmir_rank(dw, k);
841 }
842 }
843
844 i5100_init_mtr(mci);
845 }
846
847 static void i5100_init_csrows(struct mem_ctl_info *mci)
848 {
849 int i;
850 struct i5100_priv *priv = mci->pvt_info;
851
852 for (i = 0; i < mci->tot_dimms; i++) {
853 struct dimm_info *dimm;
854 const unsigned long npages = i5100_npages(mci, i);
855 const unsigned chan = i5100_csrow_to_chan(mci, i);
856 const unsigned rank = i5100_csrow_to_rank(mci, i);
857
858 if (!npages)
859 continue;
860
861 dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
862 chan, rank, 0);
863
864 dimm->nr_pages = npages;
865 dimm->grain = 32;
866 dimm->dtype = (priv->mtr[chan][rank].width == 4) ?
867 DEV_X4 : DEV_X8;
868 dimm->mtype = MEM_RDDR2;
869 dimm->edac_mode = EDAC_SECDED;
870 snprintf(dimm->label, sizeof(dimm->label), "DIMM%u",
871 i5100_rank_to_slot(mci, chan, rank));
872
873 edac_dbg(2, "dimm channel %d, rank %d, size %ld\n",
874 chan, rank, (long)PAGES_TO_MiB(npages));
875 }
876 }
877
878 /****************************************************************************
879 * Error injection routines
880 ****************************************************************************/
881
882 static void i5100_do_inject(struct mem_ctl_info *mci)
883 {
884 struct i5100_priv *priv = mci->pvt_info;
885 u32 mask0;
886 u16 mask1;
887
888 /* MEM[1:0]EINJMSK0
889 * 31 - ADDRMATCHEN
890 * 29:28 - HLINESEL
891 * 00 Reserved
892 * 01 Lower half of cache line
893 * 10 Upper half of cache line
894 * 11 Both upper and lower parts of cache line
895 * 27 - EINJEN
896 * 25:19 - XORMASK1 for deviceptr1
897 * 9:5 - SEC2RAM for deviceptr2
898 * 4:0 - FIR2RAM for deviceptr1
899 */
900 mask0 = ((priv->inject_hlinesel & 0x3) << 28) |
901 I5100_MEMXEINJMSK0_EINJEN |
902 ((priv->inject_eccmask1 & 0xffff) << 10) |
903 ((priv->inject_deviceptr2 & 0x1f) << 5) |
904 (priv->inject_deviceptr1 & 0x1f);
905
906 /* MEM[1:0]EINJMSK1
907 * 15:0 - XORMASK2 for deviceptr2
908 */
909 mask1 = priv->inject_eccmask2;
910
911 if (priv->inject_channel == 0) {
912 pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0);
913 pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1);
914 } else {
915 pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0);
916 pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1);
917 }
918
919 /* Error Injection Response Function
920 * Intel 5100 Memory Controller Hub Chipset (318378) datasheet
921 * hints about this register but carry no data about them. All
922 * data regarding device 19 is based on experimentation and the
923 * Intel 7300 Chipset Memory Controller Hub (318082) datasheet
924 * which appears to be accurate for the i5100 in this area.
925 *
926 * The injection code don't work without setting this register.
927 * The register needs to be flipped off then on else the hardware
928 * will only preform the first injection.
929 *
930 * Stop condition bits 7:4
931 * 1010 - Stop after one injection
932 * 1011 - Never stop injecting faults
933 *
934 * Start condition bits 3:0
935 * 1010 - Never start
936 * 1011 - Start immediately
937 */
938 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa);
939 pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab);
940 }
941
942 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
943 static ssize_t inject_enable_write(struct file *file, const char __user *data,
944 size_t count, loff_t *ppos)
945 {
946 struct device *dev = file->private_data;
947 struct mem_ctl_info *mci = to_mci(dev);
948
949 i5100_do_inject(mci);
950
951 return count;
952 }
953
954 static const struct file_operations i5100_inject_enable_fops = {
955 .open = simple_open,
956 .write = inject_enable_write,
957 .llseek = generic_file_llseek,
958 };
959
960 static int i5100_setup_debugfs(struct mem_ctl_info *mci)
961 {
962 struct i5100_priv *priv = mci->pvt_info;
963
964 if (!i5100_debugfs)
965 return -ENODEV;
966
967 priv->debugfs = edac_debugfs_create_dir_at(mci->bus->name, i5100_debugfs);
968
969 if (!priv->debugfs)
970 return -ENOMEM;
971
972 edac_debugfs_create_x8("inject_channel", S_IRUGO | S_IWUSR, priv->debugfs,
973 &priv->inject_channel);
974 edac_debugfs_create_x8("inject_hlinesel", S_IRUGO | S_IWUSR, priv->debugfs,
975 &priv->inject_hlinesel);
976 edac_debugfs_create_x8("inject_deviceptr1", S_IRUGO | S_IWUSR, priv->debugfs,
977 &priv->inject_deviceptr1);
978 edac_debugfs_create_x8("inject_deviceptr2", S_IRUGO | S_IWUSR, priv->debugfs,
979 &priv->inject_deviceptr2);
980 edac_debugfs_create_x16("inject_eccmask1", S_IRUGO | S_IWUSR, priv->debugfs,
981 &priv->inject_eccmask1);
982 edac_debugfs_create_x16("inject_eccmask2", S_IRUGO | S_IWUSR, priv->debugfs,
983 &priv->inject_eccmask2);
984 edac_debugfs_create_file("inject_enable", S_IWUSR, priv->debugfs,
985 &mci->dev, &i5100_inject_enable_fops);
986
987 return 0;
988
989 }
990
991 static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
992 {
993 int rc;
994 struct mem_ctl_info *mci;
995 struct edac_mc_layer layers[2];
996 struct i5100_priv *priv;
997 struct pci_dev *ch0mm, *ch1mm, *einj;
998 int ret = 0;
999 u32 dw;
1000 int ranksperch;
1001
1002 if (PCI_FUNC(pdev->devfn) != 1)
1003 return -ENODEV;
1004
1005 rc = pci_enable_device(pdev);
1006 if (rc < 0) {
1007 ret = rc;
1008 goto bail;
1009 }
1010
1011 /* ECC enabled? */
1012 pci_read_config_dword(pdev, I5100_MC, &dw);
1013 if (!i5100_mc_errdeten(dw)) {
1014 printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
1015 ret = -ENODEV;
1016 goto bail_pdev;
1017 }
1018
1019 /* figure out how many ranks, from strapped state of 48GB_Mode input */
1020 pci_read_config_dword(pdev, I5100_MS, &dw);
1021 ranksperch = !!(dw & (1 << 8)) * 2 + 4;
1022
1023 /* enable error reporting... */
1024 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw);
1025 dw &= ~I5100_FERR_NF_MEM_ANY_MASK;
1026 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw);
1027
1028 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */
1029 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1030 PCI_DEVICE_ID_INTEL_5100_21, 0);
1031 if (!ch0mm) {
1032 ret = -ENODEV;
1033 goto bail_pdev;
1034 }
1035
1036 rc = pci_enable_device(ch0mm);
1037 if (rc < 0) {
1038 ret = rc;
1039 goto bail_ch0;
1040 }
1041
1042 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */
1043 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1044 PCI_DEVICE_ID_INTEL_5100_22, 0);
1045 if (!ch1mm) {
1046 ret = -ENODEV;
1047 goto bail_disable_ch0;
1048 }
1049
1050 rc = pci_enable_device(ch1mm);
1051 if (rc < 0) {
1052 ret = rc;
1053 goto bail_ch1;
1054 }
1055
1056 layers[0].type = EDAC_MC_LAYER_CHANNEL;
1057 layers[0].size = 2;
1058 layers[0].is_virt_csrow = false;
1059 layers[1].type = EDAC_MC_LAYER_SLOT;
1060 layers[1].size = ranksperch;
1061 layers[1].is_virt_csrow = true;
1062 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers,
1063 sizeof(*priv));
1064 if (!mci) {
1065 ret = -ENOMEM;
1066 goto bail_disable_ch1;
1067 }
1068
1069
1070 /* device 19, func 0, Error injection */
1071 einj = pci_get_device_func(PCI_VENDOR_ID_INTEL,
1072 PCI_DEVICE_ID_INTEL_5100_19, 0);
1073 if (!einj) {
1074 ret = -ENODEV;
1075 goto bail_einj;
1076 }
1077
1078 rc = pci_enable_device(einj);
1079 if (rc < 0) {
1080 ret = rc;
1081 goto bail_disable_einj;
1082 }
1083
1084
1085 mci->pdev = &pdev->dev;
1086
1087 priv = mci->pvt_info;
1088 priv->ranksperchan = ranksperch;
1089 priv->mc = pdev;
1090 priv->ch0mm = ch0mm;
1091 priv->ch1mm = ch1mm;
1092 priv->einj = einj;
1093
1094 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing);
1095
1096 /* If scrubbing was already enabled by the bios, start maintaining it */
1097 pci_read_config_dword(pdev, I5100_MC, &dw);
1098 if (i5100_mc_scrben(dw)) {
1099 priv->scrub_enable = 1;
1100 schedule_delayed_work(&(priv->i5100_scrubbing),
1101 I5100_SCRUB_REFRESH_RATE);
1102 }
1103
1104 i5100_init_dimm_layout(pdev, mci);
1105 i5100_init_interleaving(pdev, mci);
1106
1107 mci->mtype_cap = MEM_FLAG_FB_DDR2;
1108 mci->edac_ctl_cap = EDAC_FLAG_SECDED;
1109 mci->edac_cap = EDAC_FLAG_SECDED;
1110 mci->mod_name = "i5100_edac.c";
1111 mci->ctl_name = "i5100";
1112 mci->dev_name = pci_name(pdev);
1113 mci->ctl_page_to_phys = NULL;
1114
1115 mci->edac_check = i5100_check_error;
1116 mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
1117 mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
1118
1119 priv->inject_channel = 0;
1120 priv->inject_hlinesel = 0;
1121 priv->inject_deviceptr1 = 0;
1122 priv->inject_deviceptr2 = 0;
1123 priv->inject_eccmask1 = 0;
1124 priv->inject_eccmask2 = 0;
1125
1126 i5100_init_csrows(mci);
1127
1128 /* this strange construction seems to be in every driver, dunno why */
1129 switch (edac_op_state) {
1130 case EDAC_OPSTATE_POLL:
1131 case EDAC_OPSTATE_NMI:
1132 break;
1133 default:
1134 edac_op_state = EDAC_OPSTATE_POLL;
1135 break;
1136 }
1137
1138 if (edac_mc_add_mc(mci)) {
1139 ret = -ENODEV;
1140 goto bail_scrub;
1141 }
1142
1143 i5100_setup_debugfs(mci);
1144
1145 return ret;
1146
1147 bail_scrub:
1148 priv->scrub_enable = 0;
1149 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1150 edac_mc_free(mci);
1151
1152 bail_disable_einj:
1153 pci_disable_device(einj);
1154
1155 bail_einj:
1156 pci_dev_put(einj);
1157
1158 bail_disable_ch1:
1159 pci_disable_device(ch1mm);
1160
1161 bail_ch1:
1162 pci_dev_put(ch1mm);
1163
1164 bail_disable_ch0:
1165 pci_disable_device(ch0mm);
1166
1167 bail_ch0:
1168 pci_dev_put(ch0mm);
1169
1170 bail_pdev:
1171 pci_disable_device(pdev);
1172
1173 bail:
1174 return ret;
1175 }
1176
1177 static void i5100_remove_one(struct pci_dev *pdev)
1178 {
1179 struct mem_ctl_info *mci;
1180 struct i5100_priv *priv;
1181
1182 mci = edac_mc_del_mc(&pdev->dev);
1183
1184 if (!mci)
1185 return;
1186
1187 priv = mci->pvt_info;
1188
1189 edac_debugfs_remove_recursive(priv->debugfs);
1190
1191 priv->scrub_enable = 0;
1192 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1193
1194 pci_disable_device(pdev);
1195 pci_disable_device(priv->ch0mm);
1196 pci_disable_device(priv->ch1mm);
1197 pci_disable_device(priv->einj);
1198 pci_dev_put(priv->ch0mm);
1199 pci_dev_put(priv->ch1mm);
1200 pci_dev_put(priv->einj);
1201
1202 edac_mc_free(mci);
1203 }
1204
1205 static const struct pci_device_id i5100_pci_tbl[] = {
1206 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */
1207 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) },
1208 { 0, }
1209 };
1210 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl);
1211
1212 static struct pci_driver i5100_driver = {
1213 .name = KBUILD_BASENAME,
1214 .probe = i5100_init_one,
1215 .remove = i5100_remove_one,
1216 .id_table = i5100_pci_tbl,
1217 };
1218
1219 static int __init i5100_init(void)
1220 {
1221 int pci_rc;
1222
1223 i5100_debugfs = edac_debugfs_create_dir_at("i5100_edac", NULL);
1224
1225 pci_rc = pci_register_driver(&i5100_driver);
1226 return (pci_rc < 0) ? pci_rc : 0;
1227 }
1228
1229 static void __exit i5100_exit(void)
1230 {
1231 edac_debugfs_remove(i5100_debugfs);
1232
1233 pci_unregister_driver(&i5100_driver);
1234 }
1235
1236 module_init(i5100_init);
1237 module_exit(i5100_exit);
1238
1239 MODULE_LICENSE("GPL");
1240 MODULE_AUTHOR
1241 ("Arthur Jones <ajones@riverbed.com>");
1242 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers");
Linux with added FPC-III support