1 /*
2 * Intel e7xxx Memory Controller kernel module
3 * (C) 2003 Linux Networx (http://lnxi.com)
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
6 *
7 * See "enum e7xxx_chips" below for supported chipsets
8 *
9 * Written by Thayne Harbaugh
10 * Based on work by Dan Hollis <goemon at anime dot net> and others.
11 * http://www.anime.net/~goemon/linux-ecc/
12 *
13 * Contributors:
14 * Eric Biederman (Linux Networx)
15 * Tom Zimmerman (Linux Networx)
16 * Jim Garlick (Lawrence Livermore National Labs)
17 * Dave Peterson (Lawrence Livermore National Labs)
18 * That One Guy (Some other place)
19 * Wang Zhenyu (intel.com)
20 *
21 * $Id: edac_e7xxx.c,v 1.5.2.9 2005/10/05 00:43:44 dsp_llnl Exp $
22 *
23 */
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/pci.h>
28 #include <linux/pci_ids.h>
29 #include <linux/edac.h>
30 #include "edac_core.h"
31
32 #define E7XXX_REVISION " Ver: 2.0.2"
33 #define EDAC_MOD_STR "e7xxx_edac"
34
35 #define e7xxx_printk(level, fmt, arg...) \
36 edac_printk(level, "e7xxx", fmt, ##arg)
37
38 #define e7xxx_mc_printk(mci, level, fmt, arg...) \
39 edac_mc_chipset_printk(mci, level, "e7xxx", fmt, ##arg)
40
41 #ifndef PCI_DEVICE_ID_INTEL_7205_0
42 #define PCI_DEVICE_ID_INTEL_7205_0 0x255d
43 #endif /* PCI_DEVICE_ID_INTEL_7205_0 */
44
45 #ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR
46 #define PCI_DEVICE_ID_INTEL_7205_1_ERR 0x2551
47 #endif /* PCI_DEVICE_ID_INTEL_7205_1_ERR */
48
49 #ifndef PCI_DEVICE_ID_INTEL_7500_0
50 #define PCI_DEVICE_ID_INTEL_7500_0 0x2540
51 #endif /* PCI_DEVICE_ID_INTEL_7500_0 */
52
53 #ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR
54 #define PCI_DEVICE_ID_INTEL_7500_1_ERR 0x2541
55 #endif /* PCI_DEVICE_ID_INTEL_7500_1_ERR */
56
57 #ifndef PCI_DEVICE_ID_INTEL_7501_0
58 #define PCI_DEVICE_ID_INTEL_7501_0 0x254c
59 #endif /* PCI_DEVICE_ID_INTEL_7501_0 */
60
61 #ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR
62 #define PCI_DEVICE_ID_INTEL_7501_1_ERR 0x2541
63 #endif /* PCI_DEVICE_ID_INTEL_7501_1_ERR */
64
65 #ifndef PCI_DEVICE_ID_INTEL_7505_0
66 #define PCI_DEVICE_ID_INTEL_7505_0 0x2550
67 #endif /* PCI_DEVICE_ID_INTEL_7505_0 */
68
69 #ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR
70 #define PCI_DEVICE_ID_INTEL_7505_1_ERR 0x2551
71 #endif /* PCI_DEVICE_ID_INTEL_7505_1_ERR */
72
73 #define E7XXX_NR_CSROWS 8 /* number of csrows */
74 #define E7XXX_NR_DIMMS 8 /* FIXME - is this correct? */
75
76 /* E7XXX register addresses - device 0 function 0 */
77 #define E7XXX_DRB 0x60 /* DRAM row boundary register (8b) */
78 #define E7XXX_DRA 0x70 /* DRAM row attribute register (8b) */
79 /*
80 * 31 Device width row 7 0=x8 1=x4
81 * 27 Device width row 6
82 * 23 Device width row 5
83 * 19 Device width row 4
84 * 15 Device width row 3
85 * 11 Device width row 2
86 * 7 Device width row 1
87 * 3 Device width row 0
88 */
89 #define E7XXX_DRC 0x7C /* DRAM controller mode reg (32b) */
90 /*
91 * 22 Number channels 0=1,1=2
92 * 19:18 DRB Granularity 32/64MB
93 */
94 #define E7XXX_TOLM 0xC4 /* DRAM top of low memory reg (16b) */
95 #define E7XXX_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */
96 #define E7XXX_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */
97
98 /* E7XXX register addresses - device 0 function 1 */
99 #define E7XXX_DRAM_FERR 0x80 /* DRAM first error register (8b) */
100 #define E7XXX_DRAM_NERR 0x82 /* DRAM next error register (8b) */
101 #define E7XXX_DRAM_CELOG_ADD 0xA0 /* DRAM first correctable memory */
102 /* error address register (32b) */
103 /*
104 * 31:28 Reserved
105 * 27:6 CE address (4k block 33:12)
106 * 5:0 Reserved
107 */
108 #define E7XXX_DRAM_UELOG_ADD 0xB0 /* DRAM first uncorrectable memory */
109 /* error address register (32b) */
110 /*
111 * 31:28 Reserved
112 * 27:6 CE address (4k block 33:12)
113 * 5:0 Reserved
114 */
115 #define E7XXX_DRAM_CELOG_SYNDROME 0xD0 /* DRAM first correctable memory */
116 /* error syndrome register (16b) */
117
118 enum e7xxx_chips {
119 E7500 = 0,
120 E7501,
121 E7505,
122 E7205,
123 };
124
125 struct e7xxx_pvt {
126 struct pci_dev *bridge_ck;
127 u32 tolm;
128 u32 remapbase;
129 u32 remaplimit;
130 const struct e7xxx_dev_info *dev_info;
131 };
132
133 struct e7xxx_dev_info {
134 u16 err_dev;
135 const char *ctl_name;
136 };
137
138 struct e7xxx_error_info {
139 u8 dram_ferr;
140 u8 dram_nerr;
141 u32 dram_celog_add;
142 u16 dram_celog_syndrome;
143 u32 dram_uelog_add;
144 };
145
146 static struct edac_pci_ctl_info *e7xxx_pci;
147
148 static const struct e7xxx_dev_info e7xxx_devs[] = {
149 [E7500] = {
150 .err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR,
151 .ctl_name = "E7500"},
152 [E7501] = {
153 .err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR,
154 .ctl_name = "E7501"},
155 [E7505] = {
156 .err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR,
157 .ctl_name = "E7505"},
158 [E7205] = {
159 .err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR,
160 .ctl_name = "E7205"},
161 };
162
163 /* FIXME - is this valid for both SECDED and S4ECD4ED? */
e7xxx_find_channel(u16 syndrome)164 static inline int e7xxx_find_channel(u16 syndrome)
165 {
166 debugf3("%s()\n", __func__);
167
168 if ((syndrome & 0xff00) == 0)
169 return 0;
170
171 if ((syndrome & 0x00ff) == 0)
172 return 1;
173
174 if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0)
175 return 0;
176
177 return 1;
178 }
179
ctl_page_to_phys(struct mem_ctl_info * mci,unsigned long page)180 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
181 unsigned long page)
182 {
183 u32 remap;
184 struct e7xxx_pvt *pvt = (struct e7xxx_pvt *)mci->pvt_info;
185
186 debugf3("%s()\n", __func__);
187
188 if ((page < pvt->tolm) ||
189 ((page >= 0x100000) && (page < pvt->remapbase)))
190 return page;
191
192 remap = (page - pvt->tolm) + pvt->remapbase;
193
194 if (remap < pvt->remaplimit)
195 return remap;
196
197 e7xxx_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
198 return pvt->tolm - 1;
199 }
200
process_ce(struct mem_ctl_info * mci,struct e7xxx_error_info * info)201 static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
202 {
203 u32 error_1b, page;
204 u16 syndrome;
205 int row;
206 int channel;
207
208 debugf3("%s()\n", __func__);
209 /* read the error address */
210 error_1b = info->dram_celog_add;
211 /* FIXME - should use PAGE_SHIFT */
212 page = error_1b >> 6; /* convert the address to 4k page */
213 /* read the syndrome */
214 syndrome = info->dram_celog_syndrome;
215 /* FIXME - check for -1 */
216 row = edac_mc_find_csrow_by_page(mci, page);
217 /* convert syndrome to channel */
218 channel = e7xxx_find_channel(syndrome);
219 edac_mc_handle_ce(mci, page, 0, syndrome, row, channel, "e7xxx CE");
220 }
221
process_ce_no_info(struct mem_ctl_info * mci)222 static void process_ce_no_info(struct mem_ctl_info *mci)
223 {
224 debugf3("%s()\n", __func__);
225 edac_mc_handle_ce_no_info(mci, "e7xxx CE log register overflow");
226 }
227
process_ue(struct mem_ctl_info * mci,struct e7xxx_error_info * info)228 static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
229 {
230 u32 error_2b, block_page;
231 int row;
232
233 debugf3("%s()\n", __func__);
234 /* read the error address */
235 error_2b = info->dram_uelog_add;
236 /* FIXME - should use PAGE_SHIFT */
237 block_page = error_2b >> 6; /* convert to 4k address */
238 row = edac_mc_find_csrow_by_page(mci, block_page);
239 edac_mc_handle_ue(mci, block_page, 0, row, "e7xxx UE");
240 }
241
process_ue_no_info(struct mem_ctl_info * mci)242 static void process_ue_no_info(struct mem_ctl_info *mci)
243 {
244 debugf3("%s()\n", __func__);
245 edac_mc_handle_ue_no_info(mci, "e7xxx UE log register overflow");
246 }
247
e7xxx_get_error_info(struct mem_ctl_info * mci,struct e7xxx_error_info * info)248 static void e7xxx_get_error_info(struct mem_ctl_info *mci,
249 struct e7xxx_error_info *info)
250 {
251 struct e7xxx_pvt *pvt;
252
253 pvt = (struct e7xxx_pvt *)mci->pvt_info;
254 pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR, &info->dram_ferr);
255 pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR, &info->dram_nerr);
256
257 if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) {
258 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD,
259 &info->dram_celog_add);
260 pci_read_config_word(pvt->bridge_ck,
261 E7XXX_DRAM_CELOG_SYNDROME,
262 &info->dram_celog_syndrome);
263 }
264
265 if ((info->dram_ferr & 2) || (info->dram_nerr & 2))
266 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD,
267 &info->dram_uelog_add);
268
269 if (info->dram_ferr & 3)
270 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03);
271
272 if (info->dram_nerr & 3)
273 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03);
274 }
275
e7xxx_process_error_info(struct mem_ctl_info * mci,struct e7xxx_error_info * info,int handle_errors)276 static int e7xxx_process_error_info(struct mem_ctl_info *mci,
277 struct e7xxx_error_info *info,
278 int handle_errors)
279 {
280 int error_found;
281
282 error_found = 0;
283
284 /* decode and report errors */
285 if (info->dram_ferr & 1) { /* check first error correctable */
286 error_found = 1;
287
288 if (handle_errors)
289 process_ce(mci, info);
290 }
291
292 if (info->dram_ferr & 2) { /* check first error uncorrectable */
293 error_found = 1;
294
295 if (handle_errors)
296 process_ue(mci, info);
297 }
298
299 if (info->dram_nerr & 1) { /* check next error correctable */
300 error_found = 1;
301
302 if (handle_errors) {
303 if (info->dram_ferr & 1)
304 process_ce_no_info(mci);
305 else
306 process_ce(mci, info);
307 }
308 }
309
310 if (info->dram_nerr & 2) { /* check next error uncorrectable */
311 error_found = 1;
312
313 if (handle_errors) {
314 if (info->dram_ferr & 2)
315 process_ue_no_info(mci);
316 else
317 process_ue(mci, info);
318 }
319 }
320
321 return error_found;
322 }
323
e7xxx_check(struct mem_ctl_info * mci)324 static void e7xxx_check(struct mem_ctl_info *mci)
325 {
326 struct e7xxx_error_info info;
327
328 debugf3("%s()\n", __func__);
329 e7xxx_get_error_info(mci, &info);
330 e7xxx_process_error_info(mci, &info, 1);
331 }
332
333 /* Return 1 if dual channel mode is active. Else return 0. */
dual_channel_active(u32 drc,int dev_idx)334 static inline int dual_channel_active(u32 drc, int dev_idx)
335 {
336 return (dev_idx == E7501) ? ((drc >> 22) & 0x1) : 1;
337 }
338
339 /* Return DRB granularity (0=32mb, 1=64mb). */
drb_granularity(u32 drc,int dev_idx)340 static inline int drb_granularity(u32 drc, int dev_idx)
341 {
342 /* only e7501 can be single channel */
343 return (dev_idx == E7501) ? ((drc >> 18) & 0x3) : 1;
344 }
345
e7xxx_init_csrows(struct mem_ctl_info * mci,struct pci_dev * pdev,int dev_idx,u32 drc)346 static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
347 int dev_idx, u32 drc)
348 {
349 unsigned long last_cumul_size;
350 int index;
351 u8 value;
352 u32 dra, cumul_size;
353 int drc_chan, drc_drbg, drc_ddim, mem_dev;
354 struct csrow_info *csrow;
355
356 pci_read_config_dword(pdev, E7XXX_DRA, &dra);
357 drc_chan = dual_channel_active(drc, dev_idx);
358 drc_drbg = drb_granularity(drc, dev_idx);
359 drc_ddim = (drc >> 20) & 0x3;
360 last_cumul_size = 0;
361
362 /* The dram row boundary (DRB) reg values are boundary address
363 * for each DRAM row with a granularity of 32 or 64MB (single/dual
364 * channel operation). DRB regs are cumulative; therefore DRB7 will
365 * contain the total memory contained in all eight rows.
366 */
367 for (index = 0; index < mci->nr_csrows; index++) {
368 /* mem_dev 0=x8, 1=x4 */
369 mem_dev = (dra >> (index * 4 + 3)) & 0x1;
370 csrow = &mci->csrows[index];
371
372 pci_read_config_byte(pdev, E7XXX_DRB + index, &value);
373 /* convert a 64 or 32 MiB DRB to a page size. */
374 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
375 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
376 cumul_size);
377 if (cumul_size == last_cumul_size)
378 continue; /* not populated */
379
380 csrow->first_page = last_cumul_size;
381 csrow->last_page = cumul_size - 1;
382 csrow->nr_pages = cumul_size - last_cumul_size;
383 last_cumul_size = cumul_size;
384 csrow->grain = 1 << 12; /* 4KiB - resolution of CELOG */
385 csrow->mtype = MEM_RDDR; /* only one type supported */
386 csrow->dtype = mem_dev ? DEV_X4 : DEV_X8;
387
388 /*
389 * if single channel or x8 devices then SECDED
390 * if dual channel and x4 then S4ECD4ED
391 */
392 if (drc_ddim) {
393 if (drc_chan && mem_dev) {
394 csrow->edac_mode = EDAC_S4ECD4ED;
395 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
396 } else {
397 csrow->edac_mode = EDAC_SECDED;
398 mci->edac_cap |= EDAC_FLAG_SECDED;
399 }
400 } else
401 csrow->edac_mode = EDAC_NONE;
402 }
403 }
404
e7xxx_probe1(struct pci_dev * pdev,int dev_idx)405 static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
406 {
407 u16 pci_data;
408 struct mem_ctl_info *mci = NULL;
409 struct e7xxx_pvt *pvt = NULL;
410 u32 drc;
411 int drc_chan;
412 struct e7xxx_error_info discard;
413
414 debugf0("%s(): mci\n", __func__);
415
416 pci_read_config_dword(pdev, E7XXX_DRC, &drc);
417
418 drc_chan = dual_channel_active(drc, dev_idx);
419 mci = edac_mc_alloc(sizeof(*pvt), E7XXX_NR_CSROWS, drc_chan + 1, 0);
420
421 if (mci == NULL)
422 return -ENOMEM;
423
424 debugf3("%s(): init mci\n", __func__);
425 mci->mtype_cap = MEM_FLAG_RDDR;
426 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED |
427 EDAC_FLAG_S4ECD4ED;
428 /* FIXME - what if different memory types are in different csrows? */
429 mci->mod_name = EDAC_MOD_STR;
430 mci->mod_ver = E7XXX_REVISION;
431 mci->dev = &pdev->dev;
432 debugf3("%s(): init pvt\n", __func__);
433 pvt = (struct e7xxx_pvt *)mci->pvt_info;
434 pvt->dev_info = &e7xxx_devs[dev_idx];
435 pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
436 pvt->dev_info->err_dev, pvt->bridge_ck);
437
438 if (!pvt->bridge_ck) {
439 e7xxx_printk(KERN_ERR, "error reporting device not found:"
440 "vendor %x device 0x%x (broken BIOS?)\n",
441 PCI_VENDOR_ID_INTEL, e7xxx_devs[dev_idx].err_dev);
442 goto fail0;
443 }
444
445 debugf3("%s(): more mci init\n", __func__);
446 mci->ctl_name = pvt->dev_info->ctl_name;
447 mci->dev_name = pci_name(pdev);
448 mci->edac_check = e7xxx_check;
449 mci->ctl_page_to_phys = ctl_page_to_phys;
450 e7xxx_init_csrows(mci, pdev, dev_idx, drc);
451 mci->edac_cap |= EDAC_FLAG_NONE;
452 debugf3("%s(): tolm, remapbase, remaplimit\n", __func__);
453 /* load the top of low memory, remap base, and remap limit vars */
454 pci_read_config_word(pdev, E7XXX_TOLM, &pci_data);
455 pvt->tolm = ((u32) pci_data) << 4;
456 pci_read_config_word(pdev, E7XXX_REMAPBASE, &pci_data);
457 pvt->remapbase = ((u32) pci_data) << 14;
458 pci_read_config_word(pdev, E7XXX_REMAPLIMIT, &pci_data);
459 pvt->remaplimit = ((u32) pci_data) << 14;
460 e7xxx_printk(KERN_INFO,
461 "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
462 pvt->remapbase, pvt->remaplimit);
463
464 /* clear any pending errors, or initial state bits */
465 e7xxx_get_error_info(mci, &discard);
466
467 /* Here we assume that we will never see multiple instances of this
468 * type of memory controller. The ID is therefore hardcoded to 0.
469 */
470 if (edac_mc_add_mc(mci)) {
471 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
472 goto fail1;
473 }
474
475 /* allocating generic PCI control info */
476 e7xxx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
477 if (!e7xxx_pci) {
478 printk(KERN_WARNING
479 "%s(): Unable to create PCI control\n",
480 __func__);
481 printk(KERN_WARNING
482 "%s(): PCI error report via EDAC not setup\n",
483 __func__);
484 }
485
486 /* get this far and it's successful */
487 debugf3("%s(): success\n", __func__);
488 return 0;
489
490 fail1:
491 pci_dev_put(pvt->bridge_ck);
492
493 fail0:
494 edac_mc_free(mci);
495
496 return -ENODEV;
497 }
498
499 /* returns count (>= 0), or negative on error */
e7xxx_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)500 static int __devinit e7xxx_init_one(struct pci_dev *pdev,
501 const struct pci_device_id *ent)
502 {
503 debugf0("%s()\n", __func__);
504
505 /* wake up and enable device */
506 return pci_enable_device(pdev) ?
507 -EIO : e7xxx_probe1(pdev, ent->driver_data);
508 }
509
e7xxx_remove_one(struct pci_dev * pdev)510 static void __devexit e7xxx_remove_one(struct pci_dev *pdev)
511 {
512 struct mem_ctl_info *mci;
513 struct e7xxx_pvt *pvt;
514
515 debugf0("%s()\n", __func__);
516
517 if (e7xxx_pci)
518 edac_pci_release_generic_ctl(e7xxx_pci);
519
520 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
521 return;
522
523 pvt = (struct e7xxx_pvt *)mci->pvt_info;
524 pci_dev_put(pvt->bridge_ck);
525 edac_mc_free(mci);
526 }
527
528 static DEFINE_PCI_DEVICE_TABLE(e7xxx_pci_tbl) = {
529 {
530 PCI_VEND_DEV(INTEL, 7205_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
531 E7205},
532 {
533 PCI_VEND_DEV(INTEL, 7500_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
534 E7500},
535 {
536 PCI_VEND_DEV(INTEL, 7501_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
537 E7501},
538 {
539 PCI_VEND_DEV(INTEL, 7505_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
540 E7505},
541 {
542 0,
543 } /* 0 terminated list. */
544 };
545
546 MODULE_DEVICE_TABLE(pci, e7xxx_pci_tbl);
547
548 static struct pci_driver e7xxx_driver = {
549 .name = EDAC_MOD_STR,
550 .probe = e7xxx_init_one,
551 .remove = __devexit_p(e7xxx_remove_one),
552 .id_table = e7xxx_pci_tbl,
553 };
554
e7xxx_init(void)555 static int __init e7xxx_init(void)
556 {
557 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
558 opstate_init();
559
560 return pci_register_driver(&e7xxx_driver);
561 }
562
e7xxx_exit(void)563 static void __exit e7xxx_exit(void)
564 {
565 pci_unregister_driver(&e7xxx_driver);
566 }
567
568 module_init(e7xxx_init);
569 module_exit(e7xxx_exit);
570
571 MODULE_LICENSE("GPL");
572 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n"
573 "Based on.work by Dan Hollis et al");
574 MODULE_DESCRIPTION("MC support for Intel e7xxx memory controllers");
575 module_param(edac_op_state, int, 0444);
576 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
577