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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / edac / i5100_edac.c
blobbcbdeeca48b8910b3d365547c394d46193e5b464
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 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/pci.h>
21 #include <linux/pci_ids.h>
22 #include <linux/edac.h>
23 #include <linux/delay.h>
24 #include <linux/mmzone.h>
25
26 #include "edac_core.h"
27
28 /* register addresses */
29
30 /* device 16, func 1 */
31 #define I5100_MC 0x40 /* Memory Control Register */
32 #define I5100_MC_SCRBEN_MASK (1 << 7)
33 #define I5100_MC_SCRBDONE_MASK (1 << 4)
34 #define I5100_MS 0x44 /* Memory Status Register */
35 #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */
36 #define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */
37 #define I5100_TOLM 0x6c /* Top of Low Memory */
38 #define I5100_MIR0 0x80 /* Memory Interleave Range 0 */
39 #define I5100_MIR1 0x84 /* Memory Interleave Range 1 */
40 #define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */
41 #define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */
42 #define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */
43 #define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16)
44 #define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15)
45 #define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14)
46 #define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12)
47 #define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11)
48 #define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10)
49 #define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6)
50 #define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5)
51 #define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4)
52 #define I5100_FERR_NF_MEM_M1ERR_MASK 1
53 #define I5100_FERR_NF_MEM_ANY_MASK \
54 (I5100_FERR_NF_MEM_M16ERR_MASK | \
55 I5100_FERR_NF_MEM_M15ERR_MASK | \
56 I5100_FERR_NF_MEM_M14ERR_MASK | \
57 I5100_FERR_NF_MEM_M12ERR_MASK | \
58 I5100_FERR_NF_MEM_M11ERR_MASK | \
59 I5100_FERR_NF_MEM_M10ERR_MASK | \
60 I5100_FERR_NF_MEM_M6ERR_MASK | \
61 I5100_FERR_NF_MEM_M5ERR_MASK | \
62 I5100_FERR_NF_MEM_M4ERR_MASK | \
63 I5100_FERR_NF_MEM_M1ERR_MASK)
64 #define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */
65 #define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */
66
67 /* device 21 and 22, func 0 */
68 #define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */
69 #define I5100_DMIR 0x15c /* DIMM Interleave Range */
70 #define I5100_VALIDLOG 0x18c /* Valid Log Markers */
71 #define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */
72 #define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */
73 #define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */
74 #define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */
75 #define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */
76 #define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */
77 #define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */
78
79 /* bit field accessors */
80
81 static inline u32 i5100_mc_scrben(u32 mc)
82 {
83 return mc >> 7 & 1;
84 }
85
86 static inline u32 i5100_mc_errdeten(u32 mc)
87 {
88 return mc >> 5 & 1;
89 }
90
91 static inline u32 i5100_mc_scrbdone(u32 mc)
92 {
93 return mc >> 4 & 1;
94 }
95
96 static inline u16 i5100_spddata_rdo(u16 a)
97 {
98 return a >> 15 & 1;
99 }
100
101 static inline u16 i5100_spddata_sbe(u16 a)
102 {
103 return a >> 13 & 1;
104 }
105
106 static inline u16 i5100_spddata_busy(u16 a)
107 {
108 return a >> 12 & 1;
109 }
110
111 static inline u16 i5100_spddata_data(u16 a)
112 {
113 return a & ((1 << 8) - 1);
114 }
115
116 static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba,
117 u32 data, u32 cmd)
118 {
119 return ((dti & ((1 << 4) - 1)) << 28) |
120 ((ckovrd & 1) << 27) |
121 ((sa & ((1 << 3) - 1)) << 24) |
122 ((ba & ((1 << 8) - 1)) << 16) |
123 ((data & ((1 << 8) - 1)) << 8) |
124 (cmd & 1);
125 }
126
127 static inline u16 i5100_tolm_tolm(u16 a)
128 {
129 return a >> 12 & ((1 << 4) - 1);
130 }
131
132 static inline u16 i5100_mir_limit(u16 a)
133 {
134 return a >> 4 & ((1 << 12) - 1);
135 }
136
137 static inline u16 i5100_mir_way1(u16 a)
138 {
139 return a >> 1 & 1;
140 }
141
142 static inline u16 i5100_mir_way0(u16 a)
143 {
144 return a & 1;
145 }
146
147 static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a)
148 {
149 return a >> 28 & 1;
150 }
151
152 static inline u32 i5100_ferr_nf_mem_any(u32 a)
153 {
154 return a & I5100_FERR_NF_MEM_ANY_MASK;
155 }
156
157 static inline u32 i5100_nerr_nf_mem_any(u32 a)
158 {
159 return i5100_ferr_nf_mem_any(a);
160 }
161
162 static inline u32 i5100_dmir_limit(u32 a)
163 {
164 return a >> 16 & ((1 << 11) - 1);
165 }
166
167 static inline u32 i5100_dmir_rank(u32 a, u32 i)
168 {
169 return a >> (4 * i) & ((1 << 2) - 1);
170 }
171
172 static inline u16 i5100_mtr_present(u16 a)
173 {
174 return a >> 10 & 1;
175 }
176
177 static inline u16 i5100_mtr_ethrottle(u16 a)
178 {
179 return a >> 9 & 1;
180 }
181
182 static inline u16 i5100_mtr_width(u16 a)
183 {
184 return a >> 8 & 1;
185 }
186
187 static inline u16 i5100_mtr_numbank(u16 a)
188 {
189 return a >> 6 & 1;
190 }
191
192 static inline u16 i5100_mtr_numrow(u16 a)
193 {
194 return a >> 2 & ((1 << 2) - 1);
195 }
196
197 static inline u16 i5100_mtr_numcol(u16 a)
198 {
199 return a & ((1 << 2) - 1);
200 }
201
202
203 static inline u32 i5100_validlog_redmemvalid(u32 a)
204 {
205 return a >> 2 & 1;
206 }
207
208 static inline u32 i5100_validlog_recmemvalid(u32 a)
209 {
210 return a >> 1 & 1;
211 }
212
213 static inline u32 i5100_validlog_nrecmemvalid(u32 a)
214 {
215 return a & 1;
216 }
217
218 static inline u32 i5100_nrecmema_merr(u32 a)
219 {
220 return a >> 15 & ((1 << 5) - 1);
221 }
222
223 static inline u32 i5100_nrecmema_bank(u32 a)
224 {
225 return a >> 12 & ((1 << 3) - 1);
226 }
227
228 static inline u32 i5100_nrecmema_rank(u32 a)
229 {
230 return a >> 8 & ((1 << 3) - 1);
231 }
232
233 static inline u32 i5100_nrecmema_dm_buf_id(u32 a)
234 {
235 return a & ((1 << 8) - 1);
236 }
237
238 static inline u32 i5100_nrecmemb_cas(u32 a)
239 {
240 return a >> 16 & ((1 << 13) - 1);
241 }
242
243 static inline u32 i5100_nrecmemb_ras(u32 a)
244 {
245 return a & ((1 << 16) - 1);
246 }
247
248 static inline u32 i5100_redmemb_ecc_locator(u32 a)
249 {
250 return a & ((1 << 18) - 1);
251 }
252
253 static inline u32 i5100_recmema_merr(u32 a)
254 {
255 return i5100_nrecmema_merr(a);
256 }
257
258 static inline u32 i5100_recmema_bank(u32 a)
259 {
260 return i5100_nrecmema_bank(a);
261 }
262
263 static inline u32 i5100_recmema_rank(u32 a)
264 {
265 return i5100_nrecmema_rank(a);
266 }
267
268 static inline u32 i5100_recmema_dm_buf_id(u32 a)
269 {
270 return i5100_nrecmema_dm_buf_id(a);
271 }
272
273 static inline u32 i5100_recmemb_cas(u32 a)
274 {
275 return i5100_nrecmemb_cas(a);
276 }
277
278 static inline u32 i5100_recmemb_ras(u32 a)
279 {
280 return i5100_nrecmemb_ras(a);
281 }
282
283 /* some generic limits */
284 #define I5100_MAX_RANKS_PER_CHAN 6
285 #define I5100_CHANNELS 2
286 #define I5100_MAX_RANKS_PER_DIMM 4
287 #define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */
288 #define I5100_MAX_DIMM_SLOTS_PER_CHAN 4
289 #define I5100_MAX_RANK_INTERLEAVE 4
290 #define I5100_MAX_DMIRS 5
291 #define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ)
292
293 struct i5100_priv {
294 /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */
295 int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN];
296
297 /*
298 * mainboard chip select map -- maps i5100 chip selects to
299 * DIMM slot chip selects. In the case of only 4 ranks per
300 * channel, the mapping is fairly obvious but not unique.
301 * we map -1 -> NC and assume both channels use the same
302 * map...
303 *
304 */
305 int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM];
306
307 /* memory interleave range */
308 struct {
309 u64 limit;
310 unsigned way[2];
311 } mir[I5100_CHANNELS];
312
313 /* adjusted memory interleave range register */
314 unsigned amir[I5100_CHANNELS];
315
316 /* dimm interleave range */
317 struct {
318 unsigned rank[I5100_MAX_RANK_INTERLEAVE];
319 u64 limit;
320 } dmir[I5100_CHANNELS][I5100_MAX_DMIRS];
321
322 /* memory technology registers... */
323 struct {
324 unsigned present; /* 0 or 1 */
325 unsigned ethrottle; /* 0 or 1 */
326 unsigned width; /* 4 or 8 bits */
327 unsigned numbank; /* 2 or 3 lines */
328 unsigned numrow; /* 13 .. 16 lines */
329 unsigned numcol; /* 11 .. 12 lines */
330 } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN];
331
332 u64 tolm; /* top of low memory in bytes */
333 unsigned ranksperchan; /* number of ranks per channel */
334
335 struct pci_dev *mc; /* device 16 func 1 */
336 struct pci_dev *ch0mm; /* device 21 func 0 */
337 struct pci_dev *ch1mm; /* device 22 func 0 */
338
339 struct delayed_work i5100_scrubbing;
340 int scrub_enable;
341 };
342
343 /* map a rank/chan to a slot number on the mainboard */
344 static int i5100_rank_to_slot(const struct mem_ctl_info *mci,
345 int chan, int rank)
346 {
347 const struct i5100_priv *priv = mci->pvt_info;
348 int i;
349
350 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
351 int j;
352 const int numrank = priv->dimm_numrank[chan][i];
353
354 for (j = 0; j < numrank; j++)
355 if (priv->dimm_csmap[i][j] == rank)
356 return i * 2 + chan;
357 }
358
359 return -1;
360 }
361
362 static const char *i5100_err_msg(unsigned err)
363 {
364 static const char *merrs[] = {
365 "unknown", /* 0 */
366 "uncorrectable data ECC on replay", /* 1 */
367 "unknown", /* 2 */
368 "unknown", /* 3 */
369 "aliased uncorrectable demand data ECC", /* 4 */
370 "aliased uncorrectable spare-copy data ECC", /* 5 */
371 "aliased uncorrectable patrol data ECC", /* 6 */
372 "unknown", /* 7 */
373 "unknown", /* 8 */
374 "unknown", /* 9 */
375 "non-aliased uncorrectable demand data ECC", /* 10 */
376 "non-aliased uncorrectable spare-copy data ECC", /* 11 */
377 "non-aliased uncorrectable patrol data ECC", /* 12 */
378 "unknown", /* 13 */
379 "correctable demand data ECC", /* 14 */
380 "correctable spare-copy data ECC", /* 15 */
381 "correctable patrol data ECC", /* 16 */
382 "unknown", /* 17 */
383 "SPD protocol error", /* 18 */
384 "unknown", /* 19 */
385 "spare copy initiated", /* 20 */
386 "spare copy completed", /* 21 */
387 };
388 unsigned i;
389
390 for (i = 0; i < ARRAY_SIZE(merrs); i++)
391 if (1 << i & err)
392 return merrs[i];
393
394 return "none";
395 }
396
397 /* convert csrow index into a rank (per channel -- 0..5) */
398 static int i5100_csrow_to_rank(const struct mem_ctl_info *mci, int csrow)
399 {
400 const struct i5100_priv *priv = mci->pvt_info;
401
402 return csrow % priv->ranksperchan;
403 }
404
405 /* convert csrow index into a channel (0..1) */
406 static int i5100_csrow_to_chan(const struct mem_ctl_info *mci, int csrow)
407 {
408 const struct i5100_priv *priv = mci->pvt_info;
409
410 return csrow / priv->ranksperchan;
411 }
412
413 static unsigned i5100_rank_to_csrow(const struct mem_ctl_info *mci,
414 int chan, int rank)
415 {
416 const struct i5100_priv *priv = mci->pvt_info;
417
418 return chan * priv->ranksperchan + rank;
419 }
420
421 static void i5100_handle_ce(struct mem_ctl_info *mci,
422 int chan,
423 unsigned bank,
424 unsigned rank,
425 unsigned long syndrome,
426 unsigned cas,
427 unsigned ras,
428 const char *msg)
429 {
430 const int csrow = i5100_rank_to_csrow(mci, chan, rank);
431
432 printk(KERN_ERR
433 "CE chan %d, bank %u, rank %u, syndrome 0x%lx, "
434 "cas %u, ras %u, csrow %u, label \"%s\": %s\n",
435 chan, bank, rank, syndrome, cas, ras,
436 csrow, mci->csrows[csrow].channels[0].label, msg);
437
438 mci->ce_count++;
439 mci->csrows[csrow].ce_count++;
440 mci->csrows[csrow].channels[0].ce_count++;
441 }
442
443 static void i5100_handle_ue(struct mem_ctl_info *mci,
444 int chan,
445 unsigned bank,
446 unsigned rank,
447 unsigned long syndrome,
448 unsigned cas,
449 unsigned ras,
450 const char *msg)
451 {
452 const int csrow = i5100_rank_to_csrow(mci, chan, rank);
453
454 printk(KERN_ERR
455 "UE chan %d, bank %u, rank %u, syndrome 0x%lx, "
456 "cas %u, ras %u, csrow %u, label \"%s\": %s\n",
457 chan, bank, rank, syndrome, cas, ras,
458 csrow, mci->csrows[csrow].channels[0].label, msg);
459
460 mci->ue_count++;
461 mci->csrows[csrow].ue_count++;
462 }
463
464 static void i5100_read_log(struct mem_ctl_info *mci, int chan,
465 u32 ferr, u32 nerr)
466 {
467 struct i5100_priv *priv = mci->pvt_info;
468 struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm;
469 u32 dw;
470 u32 dw2;
471 unsigned syndrome = 0;
472 unsigned ecc_loc = 0;
473 unsigned merr;
474 unsigned bank;
475 unsigned rank;
476 unsigned cas;
477 unsigned ras;
478
479 pci_read_config_dword(pdev, I5100_VALIDLOG, &dw);
480
481 if (i5100_validlog_redmemvalid(dw)) {
482 pci_read_config_dword(pdev, I5100_REDMEMA, &dw2);
483 syndrome = dw2;
484 pci_read_config_dword(pdev, I5100_REDMEMB, &dw2);
485 ecc_loc = i5100_redmemb_ecc_locator(dw2);
486 }
487
488 if (i5100_validlog_recmemvalid(dw)) {
489 const char *msg;
490
491 pci_read_config_dword(pdev, I5100_RECMEMA, &dw2);
492 merr = i5100_recmema_merr(dw2);
493 bank = i5100_recmema_bank(dw2);
494 rank = i5100_recmema_rank(dw2);
495
496 pci_read_config_dword(pdev, I5100_RECMEMB, &dw2);
497 cas = i5100_recmemb_cas(dw2);
498 ras = i5100_recmemb_ras(dw2);
499
500 /* FIXME: not really sure if this is what merr is...
501 */
502 if (!merr)
503 msg = i5100_err_msg(ferr);
504 else
505 msg = i5100_err_msg(nerr);
506
507 i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg);
508 }
509
510 if (i5100_validlog_nrecmemvalid(dw)) {
511 const char *msg;
512
513 pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2);
514 merr = i5100_nrecmema_merr(dw2);
515 bank = i5100_nrecmema_bank(dw2);
516 rank = i5100_nrecmema_rank(dw2);
517
518 pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2);
519 cas = i5100_nrecmemb_cas(dw2);
520 ras = i5100_nrecmemb_ras(dw2);
521
522 /* FIXME: not really sure if this is what merr is...
523 */
524 if (!merr)
525 msg = i5100_err_msg(ferr);
526 else
527 msg = i5100_err_msg(nerr);
528
529 i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg);
530 }
531
532 pci_write_config_dword(pdev, I5100_VALIDLOG, dw);
533 }
534
535 static void i5100_check_error(struct mem_ctl_info *mci)
536 {
537 struct i5100_priv *priv = mci->pvt_info;
538 u32 dw;
539
540
541 pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw);
542 if (i5100_ferr_nf_mem_any(dw)) {
543 u32 dw2;
544
545 pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2);
546 if (dw2)
547 pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM,
548 dw2);
549 pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw);
550
551 i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw),
552 i5100_ferr_nf_mem_any(dw),
553 i5100_nerr_nf_mem_any(dw2));
554 }
555 }
556
557 /* The i5100 chipset will scrub the entire memory once, then
558 * set a done bit. Continuous scrubbing is achieved by enqueing
559 * delayed work to a workqueue, checking every few minutes if
560 * the scrubbing has completed and if so reinitiating it.
561 */
562
563 static void i5100_refresh_scrubbing(struct work_struct *work)
564 {
565 struct delayed_work *i5100_scrubbing = container_of(work,
566 struct delayed_work,
567 work);
568 struct i5100_priv *priv = container_of(i5100_scrubbing,
569 struct i5100_priv,
570 i5100_scrubbing);
571 u32 dw;
572
573 pci_read_config_dword(priv->mc, I5100_MC, &dw);
574
575 if (priv->scrub_enable) {
576
577 pci_read_config_dword(priv->mc, I5100_MC, &dw);
578
579 if (i5100_mc_scrbdone(dw)) {
580 dw |= I5100_MC_SCRBEN_MASK;
581 pci_write_config_dword(priv->mc, I5100_MC, dw);
582 pci_read_config_dword(priv->mc, I5100_MC, &dw);
583 }
584
585 schedule_delayed_work(&(priv->i5100_scrubbing),
586 I5100_SCRUB_REFRESH_RATE);
587 }
588 }
589 /*
590 * The bandwidth is based on experimentation, feel free to refine it.
591 */
592 static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth)
593 {
594 struct i5100_priv *priv = mci->pvt_info;
595 u32 dw;
596
597 pci_read_config_dword(priv->mc, I5100_MC, &dw);
598 if (bandwidth) {
599 priv->scrub_enable = 1;
600 dw |= I5100_MC_SCRBEN_MASK;
601 schedule_delayed_work(&(priv->i5100_scrubbing),
602 I5100_SCRUB_REFRESH_RATE);
603 } else {
604 priv->scrub_enable = 0;
605 dw &= ~I5100_MC_SCRBEN_MASK;
606 cancel_delayed_work(&(priv->i5100_scrubbing));
607 }
608 pci_write_config_dword(priv->mc, I5100_MC, dw);
609
610 pci_read_config_dword(priv->mc, I5100_MC, &dw);
611
612 bandwidth = 5900000 * i5100_mc_scrben(dw);
613
614 return bandwidth;
615 }
616
617 static int i5100_get_scrub_rate(struct mem_ctl_info *mci)
618 {
619 struct i5100_priv *priv = mci->pvt_info;
620 u32 dw;
621
622 pci_read_config_dword(priv->mc, I5100_MC, &dw);
623
624 return 5900000 * i5100_mc_scrben(dw);
625 }
626
627 static struct pci_dev *pci_get_device_func(unsigned vendor,
628 unsigned device,
629 unsigned func)
630 {
631 struct pci_dev *ret = NULL;
632
633 while (1) {
634 ret = pci_get_device(vendor, device, ret);
635
636 if (!ret)
637 break;
638
639 if (PCI_FUNC(ret->devfn) == func)
640 break;
641 }
642
643 return ret;
644 }
645
646 static unsigned long __devinit i5100_npages(struct mem_ctl_info *mci,
647 int csrow)
648 {
649 struct i5100_priv *priv = mci->pvt_info;
650 const unsigned chan_rank = i5100_csrow_to_rank(mci, csrow);
651 const unsigned chan = i5100_csrow_to_chan(mci, csrow);
652 unsigned addr_lines;
653
654 /* dimm present? */
655 if (!priv->mtr[chan][chan_rank].present)
656 return 0ULL;
657
658 addr_lines =
659 I5100_DIMM_ADDR_LINES +
660 priv->mtr[chan][chan_rank].numcol +
661 priv->mtr[chan][chan_rank].numrow +
662 priv->mtr[chan][chan_rank].numbank;
663
664 return (unsigned long)
665 ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE);
666 }
667
668 static void __devinit i5100_init_mtr(struct mem_ctl_info *mci)
669 {
670 struct i5100_priv *priv = mci->pvt_info;
671 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
672 int i;
673
674 for (i = 0; i < I5100_CHANNELS; i++) {
675 int j;
676 struct pci_dev *pdev = mms[i];
677
678 for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) {
679 const unsigned addr =
680 (j < 4) ? I5100_MTR_0 + j * 2 :
681 I5100_MTR_4 + (j - 4) * 2;
682 u16 w;
683
684 pci_read_config_word(pdev, addr, &w);
685
686 priv->mtr[i][j].present = i5100_mtr_present(w);
687 priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w);
688 priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w);
689 priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w);
690 priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w);
691 priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w);
692 }
693 }
694 }
695
696 /*
697 * FIXME: make this into a real i2c adapter (so that dimm-decode
698 * will work)?
699 */
700 static int i5100_read_spd_byte(const struct mem_ctl_info *mci,
701 u8 ch, u8 slot, u8 addr, u8 *byte)
702 {
703 struct i5100_priv *priv = mci->pvt_info;
704 u16 w;
705 unsigned long et;
706
707 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
708 if (i5100_spddata_busy(w))
709 return -1;
710
711 pci_write_config_dword(priv->mc, I5100_SPDCMD,
712 i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr,
713 0, 0));
714
715 /* wait up to 100ms */
716 et = jiffies + HZ / 10;
717 udelay(100);
718 while (1) {
719 pci_read_config_word(priv->mc, I5100_SPDDATA, &w);
720 if (!i5100_spddata_busy(w))
721 break;
722 udelay(100);
723 }
724
725 if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w))
726 return -1;
727
728 *byte = i5100_spddata_data(w);
729
730 return 0;
731 }
732
733 /*
734 * fill dimm chip select map
735 *
736 * FIXME:
737 * o not the only way to may chip selects to dimm slots
738 * o investigate if there is some way to obtain this map from the bios
739 */
740 static void __devinit i5100_init_dimm_csmap(struct mem_ctl_info *mci)
741 {
742 struct i5100_priv *priv = mci->pvt_info;
743 int i;
744
745 for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) {
746 int j;
747
748 for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++)
749 priv->dimm_csmap[i][j] = -1; /* default NC */
750 }
751
752 /* only 2 chip selects per slot... */
753 if (priv->ranksperchan == 4) {
754 priv->dimm_csmap[0][0] = 0;
755 priv->dimm_csmap[0][1] = 3;
756 priv->dimm_csmap[1][0] = 1;
757 priv->dimm_csmap[1][1] = 2;
758 priv->dimm_csmap[2][0] = 2;
759 priv->dimm_csmap[3][0] = 3;
760 } else {
761 priv->dimm_csmap[0][0] = 0;
762 priv->dimm_csmap[0][1] = 1;
763 priv->dimm_csmap[1][0] = 2;
764 priv->dimm_csmap[1][1] = 3;
765 priv->dimm_csmap[2][0] = 4;
766 priv->dimm_csmap[2][1] = 5;
767 }
768 }
769
770 static void __devinit i5100_init_dimm_layout(struct pci_dev *pdev,
771 struct mem_ctl_info *mci)
772 {
773 struct i5100_priv *priv = mci->pvt_info;
774 int i;
775
776 for (i = 0; i < I5100_CHANNELS; i++) {
777 int j;
778
779 for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) {
780 u8 rank;
781
782 if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0)
783 priv->dimm_numrank[i][j] = 0;
784 else
785 priv->dimm_numrank[i][j] = (rank & 3) + 1;
786 }
787 }
788
789 i5100_init_dimm_csmap(mci);
790 }
791
792 static void __devinit i5100_init_interleaving(struct pci_dev *pdev,
793 struct mem_ctl_info *mci)
794 {
795 u16 w;
796 u32 dw;
797 struct i5100_priv *priv = mci->pvt_info;
798 struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm };
799 int i;
800
801 pci_read_config_word(pdev, I5100_TOLM, &w);
802 priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024;
803
804 pci_read_config_word(pdev, I5100_MIR0, &w);
805 priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28;
806 priv->mir[0].way[1] = i5100_mir_way1(w);
807 priv->mir[0].way[0] = i5100_mir_way0(w);
808
809 pci_read_config_word(pdev, I5100_MIR1, &w);
810 priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28;
811 priv->mir[1].way[1] = i5100_mir_way1(w);
812 priv->mir[1].way[0] = i5100_mir_way0(w);
813
814 pci_read_config_word(pdev, I5100_AMIR_0, &w);
815 priv->amir[0] = w;
816 pci_read_config_word(pdev, I5100_AMIR_1, &w);
817 priv->amir[1] = w;
818
819 for (i = 0; i < I5100_CHANNELS; i++) {
820 int j;
821
822 for (j = 0; j < 5; j++) {
823 int k;
824
825 pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw);
826
827 priv->dmir[i][j].limit =
828 (u64) i5100_dmir_limit(dw) << 28;
829 for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++)
830 priv->dmir[i][j].rank[k] =
831 i5100_dmir_rank(dw, k);
832 }
833 }
834
835 i5100_init_mtr(mci);
836 }
837
838 static void __devinit i5100_init_csrows(struct mem_ctl_info *mci)
839 {
840 int i;
841 unsigned long total_pages = 0UL;
842 struct i5100_priv *priv = mci->pvt_info;
843
844 for (i = 0; i < mci->nr_csrows; i++) {
845 const unsigned long npages = i5100_npages(mci, i);
846 const unsigned chan = i5100_csrow_to_chan(mci, i);
847 const unsigned rank = i5100_csrow_to_rank(mci, i);
848
849 if (!npages)
850 continue;
851
852 /*
853 * FIXME: these two are totally bogus -- I don't see how to
854 * map them correctly to this structure...
855 */
856 mci->csrows[i].first_page = total_pages;
857 mci->csrows[i].last_page = total_pages + npages - 1;
858 mci->csrows[i].page_mask = 0UL;
859
860 mci->csrows[i].nr_pages = npages;
861 mci->csrows[i].grain = 32;
862 mci->csrows[i].csrow_idx = i;
863 mci->csrows[i].dtype =
864 (priv->mtr[chan][rank].width == 4) ? DEV_X4 : DEV_X8;
865 mci->csrows[i].ue_count = 0;
866 mci->csrows[i].ce_count = 0;
867 mci->csrows[i].mtype = MEM_RDDR2;
868 mci->csrows[i].edac_mode = EDAC_SECDED;
869 mci->csrows[i].mci = mci;
870 mci->csrows[i].nr_channels = 1;
871 mci->csrows[i].channels[0].chan_idx = 0;
872 mci->csrows[i].channels[0].ce_count = 0;
873 mci->csrows[i].channels[0].csrow = mci->csrows + i;
874 snprintf(mci->csrows[i].channels[0].label,
875 sizeof(mci->csrows[i].channels[0].label),
876 "DIMM%u", i5100_rank_to_slot(mci, chan, rank));
877
878 total_pages += npages;
879 }
880 }
881
882 static int __devinit i5100_init_one(struct pci_dev *pdev,
883 const struct pci_device_id *id)
884 {
885 int rc;
886 struct mem_ctl_info *mci;
887 struct i5100_priv *priv;
888 struct pci_dev *ch0mm, *ch1mm;
889 int ret = 0;
890 u32 dw;
891 int ranksperch;
892
893 if (PCI_FUNC(pdev->devfn) != 1)
894 return -ENODEV;
895
896 rc = pci_enable_device(pdev);
897 if (rc < 0) {
898 ret = rc;
899 goto bail;
900 }
901
902 /* ECC enabled? */
903 pci_read_config_dword(pdev, I5100_MC, &dw);
904 if (!i5100_mc_errdeten(dw)) {
905 printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
906 ret = -ENODEV;
907 goto bail_pdev;
908 }
909
910 /* figure out how many ranks, from strapped state of 48GB_Mode input */
911 pci_read_config_dword(pdev, I5100_MS, &dw);
912 ranksperch = !!(dw & (1 << 8)) * 2 + 4;
913
914 /* enable error reporting... */
915 pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw);
916 dw &= ~I5100_FERR_NF_MEM_ANY_MASK;
917 pci_write_config_dword(pdev, I5100_EMASK_MEM, dw);
918
919 /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */
920 ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
921 PCI_DEVICE_ID_INTEL_5100_21, 0);
922 if (!ch0mm) {
923 ret = -ENODEV;
924 goto bail_pdev;
925 }
926
927 rc = pci_enable_device(ch0mm);
928 if (rc < 0) {
929 ret = rc;
930 goto bail_ch0;
931 }
932
933 /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */
934 ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL,
935 PCI_DEVICE_ID_INTEL_5100_22, 0);
936 if (!ch1mm) {
937 ret = -ENODEV;
938 goto bail_disable_ch0;
939 }
940
941 rc = pci_enable_device(ch1mm);
942 if (rc < 0) {
943 ret = rc;
944 goto bail_ch1;
945 }
946
947 mci = edac_mc_alloc(sizeof(*priv), ranksperch * 2, 1, 0);
948 if (!mci) {
949 ret = -ENOMEM;
950 goto bail_disable_ch1;
951 }
952
953 mci->dev = &pdev->dev;
954
955 priv = mci->pvt_info;
956 priv->ranksperchan = ranksperch;
957 priv->mc = pdev;
958 priv->ch0mm = ch0mm;
959 priv->ch1mm = ch1mm;
960
961 INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing);
962
963 /* If scrubbing was already enabled by the bios, start maintaining it */
964 pci_read_config_dword(pdev, I5100_MC, &dw);
965 if (i5100_mc_scrben(dw)) {
966 priv->scrub_enable = 1;
967 schedule_delayed_work(&(priv->i5100_scrubbing),
968 I5100_SCRUB_REFRESH_RATE);
969 }
970
971 i5100_init_dimm_layout(pdev, mci);
972 i5100_init_interleaving(pdev, mci);
973
974 mci->mtype_cap = MEM_FLAG_FB_DDR2;
975 mci->edac_ctl_cap = EDAC_FLAG_SECDED;
976 mci->edac_cap = EDAC_FLAG_SECDED;
977 mci->mod_name = "i5100_edac.c";
978 mci->mod_ver = "not versioned";
979 mci->ctl_name = "i5100";
980 mci->dev_name = pci_name(pdev);
981 mci->ctl_page_to_phys = NULL;
982
983 mci->edac_check = i5100_check_error;
984 mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
985 mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
986
987 i5100_init_csrows(mci);
988
989 /* this strange construction seems to be in every driver, dunno why */
990 switch (edac_op_state) {
991 case EDAC_OPSTATE_POLL:
992 case EDAC_OPSTATE_NMI:
993 break;
994 default:
995 edac_op_state = EDAC_OPSTATE_POLL;
996 break;
997 }
998
999 if (edac_mc_add_mc(mci)) {
1000 ret = -ENODEV;
1001 goto bail_scrub;
1002 }
1003
1004 return ret;
1005
1006 bail_scrub:
1007 priv->scrub_enable = 0;
1008 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1009 edac_mc_free(mci);
1010
1011 bail_disable_ch1:
1012 pci_disable_device(ch1mm);
1013
1014 bail_ch1:
1015 pci_dev_put(ch1mm);
1016
1017 bail_disable_ch0:
1018 pci_disable_device(ch0mm);
1019
1020 bail_ch0:
1021 pci_dev_put(ch0mm);
1022
1023 bail_pdev:
1024 pci_disable_device(pdev);
1025
1026 bail:
1027 return ret;
1028 }
1029
1030 static void __devexit i5100_remove_one(struct pci_dev *pdev)
1031 {
1032 struct mem_ctl_info *mci;
1033 struct i5100_priv *priv;
1034
1035 mci = edac_mc_del_mc(&pdev->dev);
1036
1037 if (!mci)
1038 return;
1039
1040 priv = mci->pvt_info;
1041
1042 priv->scrub_enable = 0;
1043 cancel_delayed_work_sync(&(priv->i5100_scrubbing));
1044
1045 pci_disable_device(pdev);
1046 pci_disable_device(priv->ch0mm);
1047 pci_disable_device(priv->ch1mm);
1048 pci_dev_put(priv->ch0mm);
1049 pci_dev_put(priv->ch1mm);
1050
1051 edac_mc_free(mci);
1052 }
1053
1054 static const struct pci_device_id i5100_pci_tbl[] __devinitdata = {
1055 /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */
1056 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) },
1057 { 0, }
1058 };
1059 MODULE_DEVICE_TABLE(pci, i5100_pci_tbl);
1060
1061 static struct pci_driver i5100_driver = {
1062 .name = KBUILD_BASENAME,
1063 .probe = i5100_init_one,
1064 .remove = __devexit_p(i5100_remove_one),
1065 .id_table = i5100_pci_tbl,
1066 };
1067
1068 static int __init i5100_init(void)
1069 {
1070 int pci_rc;
1071
1072 pci_rc = pci_register_driver(&i5100_driver);
1073
1074 return (pci_rc < 0) ? pci_rc : 0;
1075 }
1076
1077 static void __exit i5100_exit(void)
1078 {
1079 pci_unregister_driver(&i5100_driver);
1080 }
1081
1082 module_init(i5100_init);
1083 module_exit(i5100_exit);
1084
1085 MODULE_LICENSE("GPL");
1086 MODULE_AUTHOR
1087 ("Arthur Jones <ajones@riverbed.com>");
1088 MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers");
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