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28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/pci.h>
31#include <linux/pci_ids.h>
32#include <linux/edac.h>
33#include "edac_core.h"
34
35#define E7XXX_REVISION " Ver: 2.0.2"
36#define EDAC_MOD_STR "e7xxx_edac"
37
38#define e7xxx_printk(level, fmt, arg...) \
39 edac_printk(level, "e7xxx", fmt, ##arg)
40
41#define e7xxx_mc_printk(mci, level, fmt, arg...) \
42 edac_mc_chipset_printk(mci, level, "e7xxx", fmt, ##arg)
43
44#ifndef PCI_DEVICE_ID_INTEL_7205_0
45#define PCI_DEVICE_ID_INTEL_7205_0 0x255d
46#endif
47
48#ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR
49#define PCI_DEVICE_ID_INTEL_7205_1_ERR 0x2551
50#endif
51
52#ifndef PCI_DEVICE_ID_INTEL_7500_0
53#define PCI_DEVICE_ID_INTEL_7500_0 0x2540
54#endif
55
56#ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR
57#define PCI_DEVICE_ID_INTEL_7500_1_ERR 0x2541
58#endif
59
60#ifndef PCI_DEVICE_ID_INTEL_7501_0
61#define PCI_DEVICE_ID_INTEL_7501_0 0x254c
62#endif
63
64#ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR
65#define PCI_DEVICE_ID_INTEL_7501_1_ERR 0x2541
66#endif
67
68#ifndef PCI_DEVICE_ID_INTEL_7505_0
69#define PCI_DEVICE_ID_INTEL_7505_0 0x2550
70#endif
71
72#ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR
73#define PCI_DEVICE_ID_INTEL_7505_1_ERR 0x2551
74#endif
75
76#define E7XXX_NR_CSROWS 8
77#define E7XXX_NR_DIMMS 8
78
79
80#define E7XXX_DRB 0x60
81#define E7XXX_DRA 0x70
82
83
84
85
86
87
88
89
90
91
92#define E7XXX_DRC 0x7C
93
94
95
96
97#define E7XXX_TOLM 0xC4
98#define E7XXX_REMAPBASE 0xC6
99#define E7XXX_REMAPLIMIT 0xC8
100
101
102#define E7XXX_DRAM_FERR 0x80
103#define E7XXX_DRAM_NERR 0x82
104#define E7XXX_DRAM_CELOG_ADD 0xA0
105
106
107
108
109
110
111#define E7XXX_DRAM_UELOG_ADD 0xB0
112
113
114
115
116
117
118#define E7XXX_DRAM_CELOG_SYNDROME 0xD0
119
120
121enum e7xxx_chips {
122 E7500 = 0,
123 E7501,
124 E7505,
125 E7205,
126};
127
128struct e7xxx_pvt {
129 struct pci_dev *bridge_ck;
130 u32 tolm;
131 u32 remapbase;
132 u32 remaplimit;
133 const struct e7xxx_dev_info *dev_info;
134};
135
136struct e7xxx_dev_info {
137 u16 err_dev;
138 const char *ctl_name;
139};
140
141struct e7xxx_error_info {
142 u8 dram_ferr;
143 u8 dram_nerr;
144 u32 dram_celog_add;
145 u16 dram_celog_syndrome;
146 u32 dram_uelog_add;
147};
148
149static struct edac_pci_ctl_info *e7xxx_pci;
150
151static const struct e7xxx_dev_info e7xxx_devs[] = {
152 [E7500] = {
153 .err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR,
154 .ctl_name = "E7500"},
155 [E7501] = {
156 .err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR,
157 .ctl_name = "E7501"},
158 [E7505] = {
159 .err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR,
160 .ctl_name = "E7505"},
161 [E7205] = {
162 .err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR,
163 .ctl_name = "E7205"},
164};
165
166
167static inline int e7xxx_find_channel(u16 syndrome)
168{
169 edac_dbg(3, "\n");
170
171 if ((syndrome & 0xff00) == 0)
172 return 0;
173
174 if ((syndrome & 0x00ff) == 0)
175 return 1;
176
177 if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0)
178 return 0;
179
180 return 1;
181}
182
183static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
184 unsigned long page)
185{
186 u32 remap;
187 struct e7xxx_pvt *pvt = (struct e7xxx_pvt *)mci->pvt_info;
188
189 edac_dbg(3, "\n");
190
191 if ((page < pvt->tolm) ||
192 ((page >= 0x100000) && (page < pvt->remapbase)))
193 return page;
194
195 remap = (page - pvt->tolm) + pvt->remapbase;
196
197 if (remap < pvt->remaplimit)
198 return remap;
199
200 e7xxx_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
201 return pvt->tolm - 1;
202}
203
204static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
205{
206 u32 error_1b, page;
207 u16 syndrome;
208 int row;
209 int channel;
210
211 edac_dbg(3, "\n");
212
213 error_1b = info->dram_celog_add;
214
215 page = error_1b >> 6;
216
217 syndrome = info->dram_celog_syndrome;
218
219 row = edac_mc_find_csrow_by_page(mci, page);
220
221 channel = e7xxx_find_channel(syndrome);
222 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, page, 0, syndrome,
223 row, channel, -1, "e7xxx CE", "");
224}
225
226static void process_ce_no_info(struct mem_ctl_info *mci)
227{
228 edac_dbg(3, "\n");
229 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
230 "e7xxx CE log register overflow", "");
231}
232
233static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
234{
235 u32 error_2b, block_page;
236 int row;
237
238 edac_dbg(3, "\n");
239
240 error_2b = info->dram_uelog_add;
241
242 block_page = error_2b >> 6;
243 row = edac_mc_find_csrow_by_page(mci, block_page);
244
245 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, block_page, 0, 0,
246 row, -1, -1, "e7xxx UE", "");
247}
248
249static void process_ue_no_info(struct mem_ctl_info *mci)
250{
251 edac_dbg(3, "\n");
252
253 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
254 "e7xxx UE log register overflow", "");
255}
256
257static void e7xxx_get_error_info(struct mem_ctl_info *mci,
258 struct e7xxx_error_info *info)
259{
260 struct e7xxx_pvt *pvt;
261
262 pvt = (struct e7xxx_pvt *)mci->pvt_info;
263 pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR, &info->dram_ferr);
264 pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR, &info->dram_nerr);
265
266 if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) {
267 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD,
268 &info->dram_celog_add);
269 pci_read_config_word(pvt->bridge_ck,
270 E7XXX_DRAM_CELOG_SYNDROME,
271 &info->dram_celog_syndrome);
272 }
273
274 if ((info->dram_ferr & 2) || (info->dram_nerr & 2))
275 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD,
276 &info->dram_uelog_add);
277
278 if (info->dram_ferr & 3)
279 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03);
280
281 if (info->dram_nerr & 3)
282 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03);
283}
284
285static int e7xxx_process_error_info(struct mem_ctl_info *mci,
286 struct e7xxx_error_info *info,
287 int handle_errors)
288{
289 int error_found;
290
291 error_found = 0;
292
293
294 if (info->dram_ferr & 1) {
295 error_found = 1;
296
297 if (handle_errors)
298 process_ce(mci, info);
299 }
300
301 if (info->dram_ferr & 2) {
302 error_found = 1;
303
304 if (handle_errors)
305 process_ue(mci, info);
306 }
307
308 if (info->dram_nerr & 1) {
309 error_found = 1;
310
311 if (handle_errors) {
312 if (info->dram_ferr & 1)
313 process_ce_no_info(mci);
314 else
315 process_ce(mci, info);
316 }
317 }
318
319 if (info->dram_nerr & 2) {
320 error_found = 1;
321
322 if (handle_errors) {
323 if (info->dram_ferr & 2)
324 process_ue_no_info(mci);
325 else
326 process_ue(mci, info);
327 }
328 }
329
330 return error_found;
331}
332
333static void e7xxx_check(struct mem_ctl_info *mci)
334{
335 struct e7xxx_error_info info;
336
337 edac_dbg(3, "\n");
338 e7xxx_get_error_info(mci, &info);
339 e7xxx_process_error_info(mci, &info, 1);
340}
341
342
343static inline int dual_channel_active(u32 drc, int dev_idx)
344{
345 return (dev_idx == E7501) ? ((drc >> 22) & 0x1) : 1;
346}
347
348
349static inline int drb_granularity(u32 drc, int dev_idx)
350{
351
352 return (dev_idx == E7501) ? ((drc >> 18) & 0x3) : 1;
353}
354
355static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
356 int dev_idx, u32 drc)
357{
358 unsigned long last_cumul_size;
359 int index, j;
360 u8 value;
361 u32 dra, cumul_size, nr_pages;
362 int drc_chan, drc_drbg, drc_ddim, mem_dev;
363 struct csrow_info *csrow;
364 struct dimm_info *dimm;
365 enum edac_type edac_mode;
366
367 pci_read_config_dword(pdev, E7XXX_DRA, &dra);
368 drc_chan = dual_channel_active(drc, dev_idx);
369 drc_drbg = drb_granularity(drc, dev_idx);
370 drc_ddim = (drc >> 20) & 0x3;
371 last_cumul_size = 0;
372
373
374
375
376
377
378 for (index = 0; index < mci->nr_csrows; index++) {
379
380 mem_dev = (dra >> (index * 4 + 3)) & 0x1;
381 csrow = mci->csrows[index];
382
383 pci_read_config_byte(pdev, E7XXX_DRB + index, &value);
384
385 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
386 edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
387 if (cumul_size == last_cumul_size)
388 continue;
389
390 csrow->first_page = last_cumul_size;
391 csrow->last_page = cumul_size - 1;
392 nr_pages = cumul_size - last_cumul_size;
393 last_cumul_size = cumul_size;
394
395
396
397
398
399 if (drc_ddim) {
400 if (drc_chan && mem_dev) {
401 edac_mode = EDAC_S4ECD4ED;
402 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
403 } else {
404 edac_mode = EDAC_SECDED;
405 mci->edac_cap |= EDAC_FLAG_SECDED;
406 }
407 } else
408 edac_mode = EDAC_NONE;
409
410 for (j = 0; j < drc_chan + 1; j++) {
411 dimm = csrow->channels[j]->dimm;
412
413 dimm->nr_pages = nr_pages / (drc_chan + 1);
414 dimm->grain = 1 << 12;
415 dimm->mtype = MEM_RDDR;
416 dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
417 dimm->edac_mode = edac_mode;
418 }
419 }
420}
421
422static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
423{
424 u16 pci_data;
425 struct mem_ctl_info *mci = NULL;
426 struct edac_mc_layer layers[2];
427 struct e7xxx_pvt *pvt = NULL;
428 u32 drc;
429 int drc_chan;
430 struct e7xxx_error_info discard;
431
432 edac_dbg(0, "mci\n");
433
434 pci_read_config_dword(pdev, E7XXX_DRC, &drc);
435
436 drc_chan = dual_channel_active(drc, dev_idx);
437
438
439
440
441
442
443
444
445 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
446 layers[0].size = E7XXX_NR_CSROWS;
447 layers[0].is_virt_csrow = true;
448 layers[1].type = EDAC_MC_LAYER_CHANNEL;
449 layers[1].size = drc_chan + 1;
450 layers[1].is_virt_csrow = false;
451 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
452 if (mci == NULL)
453 return -ENOMEM;
454
455 edac_dbg(3, "init mci\n");
456 mci->mtype_cap = MEM_FLAG_RDDR;
457 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED |
458 EDAC_FLAG_S4ECD4ED;
459
460 mci->mod_name = EDAC_MOD_STR;
461 mci->mod_ver = E7XXX_REVISION;
462 mci->pdev = &pdev->dev;
463 edac_dbg(3, "init pvt\n");
464 pvt = (struct e7xxx_pvt *)mci->pvt_info;
465 pvt->dev_info = &e7xxx_devs[dev_idx];
466 pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
467 pvt->dev_info->err_dev, pvt->bridge_ck);
468
469 if (!pvt->bridge_ck) {
470 e7xxx_printk(KERN_ERR, "error reporting device not found:"
471 "vendor %x device 0x%x (broken BIOS?)\n",
472 PCI_VENDOR_ID_INTEL, e7xxx_devs[dev_idx].err_dev);
473 goto fail0;
474 }
475
476 edac_dbg(3, "more mci init\n");
477 mci->ctl_name = pvt->dev_info->ctl_name;
478 mci->dev_name = pci_name(pdev);
479 mci->edac_check = e7xxx_check;
480 mci->ctl_page_to_phys = ctl_page_to_phys;
481 e7xxx_init_csrows(mci, pdev, dev_idx, drc);
482 mci->edac_cap |= EDAC_FLAG_NONE;
483 edac_dbg(3, "tolm, remapbase, remaplimit\n");
484
485 pci_read_config_word(pdev, E7XXX_TOLM, &pci_data);
486 pvt->tolm = ((u32) pci_data) << 4;
487 pci_read_config_word(pdev, E7XXX_REMAPBASE, &pci_data);
488 pvt->remapbase = ((u32) pci_data) << 14;
489 pci_read_config_word(pdev, E7XXX_REMAPLIMIT, &pci_data);
490 pvt->remaplimit = ((u32) pci_data) << 14;
491 e7xxx_printk(KERN_INFO,
492 "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
493 pvt->remapbase, pvt->remaplimit);
494
495
496 e7xxx_get_error_info(mci, &discard);
497
498
499
500
501 if (edac_mc_add_mc(mci)) {
502 edac_dbg(3, "failed edac_mc_add_mc()\n");
503 goto fail1;
504 }
505
506
507 e7xxx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
508 if (!e7xxx_pci) {
509 printk(KERN_WARNING
510 "%s(): Unable to create PCI control\n",
511 __func__);
512 printk(KERN_WARNING
513 "%s(): PCI error report via EDAC not setup\n",
514 __func__);
515 }
516
517
518 edac_dbg(3, "success\n");
519 return 0;
520
521fail1:
522 pci_dev_put(pvt->bridge_ck);
523
524fail0:
525 edac_mc_free(mci);
526
527 return -ENODEV;
528}
529
530
531static int e7xxx_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
532{
533 edac_dbg(0, "\n");
534
535
536 return pci_enable_device(pdev) ?
537 -EIO : e7xxx_probe1(pdev, ent->driver_data);
538}
539
540static void e7xxx_remove_one(struct pci_dev *pdev)
541{
542 struct mem_ctl_info *mci;
543 struct e7xxx_pvt *pvt;
544
545 edac_dbg(0, "\n");
546
547 if (e7xxx_pci)
548 edac_pci_release_generic_ctl(e7xxx_pci);
549
550 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
551 return;
552
553 pvt = (struct e7xxx_pvt *)mci->pvt_info;
554 pci_dev_put(pvt->bridge_ck);
555 edac_mc_free(mci);
556}
557
558static const struct pci_device_id e7xxx_pci_tbl[] = {
559 {
560 PCI_VEND_DEV(INTEL, 7205_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
561 E7205},
562 {
563 PCI_VEND_DEV(INTEL, 7500_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
564 E7500},
565 {
566 PCI_VEND_DEV(INTEL, 7501_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
567 E7501},
568 {
569 PCI_VEND_DEV(INTEL, 7505_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
570 E7505},
571 {
572 0,
573 }
574};
575
576MODULE_DEVICE_TABLE(pci, e7xxx_pci_tbl);
577
578static struct pci_driver e7xxx_driver = {
579 .name = EDAC_MOD_STR,
580 .probe = e7xxx_init_one,
581 .remove = e7xxx_remove_one,
582 .id_table = e7xxx_pci_tbl,
583};
584
585static int __init e7xxx_init(void)
586{
587
588 opstate_init();
589
590 return pci_register_driver(&e7xxx_driver);
591}
592
593static void __exit e7xxx_exit(void)
594{
595 pci_unregister_driver(&e7xxx_driver);
596}
597
598module_init(e7xxx_init);
599module_exit(e7xxx_exit);
600
601MODULE_LICENSE("GPL");
602MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n"
603 "Based on.work by Dan Hollis et al");
604MODULE_DESCRIPTION("MC support for Intel e7xxx memory controllers");
605module_param(edac_op_state, int, 0444);
606MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
607