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1/*
2 * Intel e752x Memory Controller kernel module
3 * (C) 2004 Linux Networx (http://lnxi.com)
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
6 *
7 * Implement support for the e7520, E7525, e7320 and i3100 memory controllers.
8 *
9 * Datasheets:
10 * http://www.intel.in/content/www/in/en/chipsets/e7525-memory-controller-hub-datasheet.html
11 * ftp://download.intel.com/design/intarch/datashts/31345803.pdf
12 *
13 * Written by Tom Zimmerman
14 *
15 * Contributors:
16 * Thayne Harbaugh at realmsys.com (?)
17 * Wang Zhenyu at intel.com
18 * Dave Jiang at mvista.com
19 *
20 */
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/pci.h>
25#include <linux/pci_ids.h>
26#include <linux/edac.h>
27#include "edac_core.h"
28
29#define E752X_REVISION " Ver: 2.0.2"
30#define EDAC_MOD_STR "e752x_edac"
31
32static int report_non_memory_errors;
33static int force_function_unhide;
34static int sysbus_parity = -1;
35
36static struct edac_pci_ctl_info *e752x_pci;
37
38#define e752x_printk(level, fmt, arg...) \
39 edac_printk(level, "e752x", fmt, ##arg)
40
41#define e752x_mc_printk(mci, level, fmt, arg...) \
42 edac_mc_chipset_printk(mci, level, "e752x", fmt, ##arg)
43
44#ifndef PCI_DEVICE_ID_INTEL_7520_0
45#define PCI_DEVICE_ID_INTEL_7520_0 0x3590
46#endif /* PCI_DEVICE_ID_INTEL_7520_0 */
47
48#ifndef PCI_DEVICE_ID_INTEL_7520_1_ERR
49#define PCI_DEVICE_ID_INTEL_7520_1_ERR 0x3591
50#endif /* PCI_DEVICE_ID_INTEL_7520_1_ERR */
51
52#ifndef PCI_DEVICE_ID_INTEL_7525_0
53#define PCI_DEVICE_ID_INTEL_7525_0 0x359E
54#endif /* PCI_DEVICE_ID_INTEL_7525_0 */
55
56#ifndef PCI_DEVICE_ID_INTEL_7525_1_ERR
57#define PCI_DEVICE_ID_INTEL_7525_1_ERR 0x3593
58#endif /* PCI_DEVICE_ID_INTEL_7525_1_ERR */
59
60#ifndef PCI_DEVICE_ID_INTEL_7320_0
61#define PCI_DEVICE_ID_INTEL_7320_0 0x3592
62#endif /* PCI_DEVICE_ID_INTEL_7320_0 */
63
64#ifndef PCI_DEVICE_ID_INTEL_7320_1_ERR
65#define PCI_DEVICE_ID_INTEL_7320_1_ERR 0x3593
66#endif /* PCI_DEVICE_ID_INTEL_7320_1_ERR */
67
68#ifndef PCI_DEVICE_ID_INTEL_3100_0
69#define PCI_DEVICE_ID_INTEL_3100_0 0x35B0
70#endif /* PCI_DEVICE_ID_INTEL_3100_0 */
71
72#ifndef PCI_DEVICE_ID_INTEL_3100_1_ERR
73#define PCI_DEVICE_ID_INTEL_3100_1_ERR 0x35B1
74#endif /* PCI_DEVICE_ID_INTEL_3100_1_ERR */
75
76#define E752X_NR_CSROWS 8 /* number of csrows */
77
78/* E752X register addresses - device 0 function 0 */
79#define E752X_MCHSCRB 0x52 /* Memory Scrub register (16b) */
80 /*
81 * 6:5 Scrub Completion Count
82 * 3:2 Scrub Rate (i3100 only)
83 * 01=fast 10=normal
84 * 1:0 Scrub Mode enable
85 * 00=off 10=on
86 */
87#define E752X_DRB 0x60 /* DRAM row boundary register (8b) */
88#define E752X_DRA 0x70 /* DRAM row attribute register (8b) */
89 /*
90 * 31:30 Device width row 7
91 * 01=x8 10=x4 11=x8 DDR2
92 * 27:26 Device width row 6
93 * 23:22 Device width row 5
94 * 19:20 Device width row 4
95 * 15:14 Device width row 3
96 * 11:10 Device width row 2
97 * 7:6 Device width row 1
98 * 3:2 Device width row 0
99 */
100#define E752X_DRC 0x7C /* DRAM controller mode reg (32b) */
101 /* FIXME:IS THIS RIGHT? */
102 /*
103 * 22 Number channels 0=1,1=2
104 * 19:18 DRB Granularity 32/64MB
105 */
106#define E752X_DRM 0x80 /* Dimm mapping register */
107#define E752X_DDRCSR 0x9A /* DDR control and status reg (16b) */
108 /*
109 * 14:12 1 single A, 2 single B, 3 dual
110 */
111#define E752X_TOLM 0xC4 /* DRAM top of low memory reg (16b) */
112#define E752X_REMAPBASE 0xC6 /* DRAM remap base address reg (16b) */
113#define E752X_REMAPLIMIT 0xC8 /* DRAM remap limit address reg (16b) */
114#define E752X_REMAPOFFSET 0xCA /* DRAM remap limit offset reg (16b) */
115
116/* E752X register addresses - device 0 function 1 */
117#define E752X_FERR_GLOBAL 0x40 /* Global first error register (32b) */
118#define E752X_NERR_GLOBAL 0x44 /* Global next error register (32b) */
119#define E752X_HI_FERR 0x50 /* Hub interface first error reg (8b) */
120#define E752X_HI_NERR 0x52 /* Hub interface next error reg (8b) */
121#define E752X_HI_ERRMASK 0x54 /* Hub interface error mask reg (8b) */
122#define E752X_HI_SMICMD 0x5A /* Hub interface SMI command reg (8b) */
123#define E752X_SYSBUS_FERR 0x60 /* System buss first error reg (16b) */
124#define E752X_SYSBUS_NERR 0x62 /* System buss next error reg (16b) */
125#define E752X_SYSBUS_ERRMASK 0x64 /* System buss error mask reg (16b) */
126#define E752X_SYSBUS_SMICMD 0x6A /* System buss SMI command reg (16b) */
127#define E752X_BUF_FERR 0x70 /* Memory buffer first error reg (8b) */
128#define E752X_BUF_NERR 0x72 /* Memory buffer next error reg (8b) */
129#define E752X_BUF_ERRMASK 0x74 /* Memory buffer error mask reg (8b) */
130#define E752X_BUF_SMICMD 0x7A /* Memory buffer SMI cmd reg (8b) */
131#define E752X_DRAM_FERR 0x80 /* DRAM first error register (16b) */
132#define E752X_DRAM_NERR 0x82 /* DRAM next error register (16b) */
133#define E752X_DRAM_ERRMASK 0x84 /* DRAM error mask register (8b) */
134#define E752X_DRAM_SMICMD 0x8A /* DRAM SMI command register (8b) */
135#define E752X_DRAM_RETR_ADD 0xAC /* DRAM Retry address register (32b) */
136#define E752X_DRAM_SEC1_ADD 0xA0 /* DRAM first correctable memory */
137 /* error address register (32b) */
138 /*
139 * 31 Reserved
140 * 30:2 CE address (64 byte block 34:6
141 * 1 Reserved
142 * 0 HiLoCS
143 */
144#define E752X_DRAM_SEC2_ADD 0xC8 /* DRAM first correctable memory */
145 /* error address register (32b) */
146 /*
147 * 31 Reserved
148 * 30:2 CE address (64 byte block 34:6)
149 * 1 Reserved
150 * 0 HiLoCS
151 */
152#define E752X_DRAM_DED_ADD 0xA4 /* DRAM first uncorrectable memory */
153 /* error address register (32b) */
154 /*
155 * 31 Reserved
156 * 30:2 CE address (64 byte block 34:6)
157 * 1 Reserved
158 * 0 HiLoCS
159 */
160#define E752X_DRAM_SCRB_ADD 0xA8 /* DRAM 1st uncorrectable scrub mem */
161 /* error address register (32b) */
162 /*
163 * 31 Reserved
164 * 30:2 CE address (64 byte block 34:6
165 * 1 Reserved
166 * 0 HiLoCS
167 */
168#define E752X_DRAM_SEC1_SYNDROME 0xC4 /* DRAM first correctable memory */
169 /* error syndrome register (16b) */
170#define E752X_DRAM_SEC2_SYNDROME 0xC6 /* DRAM second correctable memory */
171 /* error syndrome register (16b) */
172#define E752X_DEVPRES1 0xF4 /* Device Present 1 register (8b) */
173
174/* 3100 IMCH specific register addresses - device 0 function 1 */
175#define I3100_NSI_FERR 0x48 /* NSI first error reg (32b) */
176#define I3100_NSI_NERR 0x4C /* NSI next error reg (32b) */
177#define I3100_NSI_SMICMD 0x54 /* NSI SMI command register (32b) */
178#define I3100_NSI_EMASK 0x90 /* NSI error mask register (32b) */
179
180/* ICH5R register addresses - device 30 function 0 */
181#define ICH5R_PCI_STAT 0x06 /* PCI status register (16b) */
182#define ICH5R_PCI_2ND_STAT 0x1E /* PCI status secondary reg (16b) */
183#define ICH5R_PCI_BRIDGE_CTL 0x3E /* PCI bridge control register (16b) */
184
185enum e752x_chips {
186 E7520 = 0,
187 E7525 = 1,
188 E7320 = 2,
189 I3100 = 3
190};
191
192/*
193 * Those chips Support single-rank and dual-rank memories only.
194 *
195 * On e752x chips, the odd rows are present only on dual-rank memories.
196 * Dividing the rank by two will provide the dimm#
197 *
198 * i3100 MC has a different mapping: it supports only 4 ranks.
199 *
200 * The mapping is (from 1 to n):
201 * slot single-ranked double-ranked
202 * dimm #1 -> rank #4 NA
203 * dimm #2 -> rank #3 NA
204 * dimm #3 -> rank #2 Ranks 2 and 3
205 * dimm #4 -> rank $1 Ranks 1 and 4
206 *
207 * FIXME: The current mapping for i3100 considers that it supports up to 8
208 * ranks/chanel, but datasheet says that the MC supports only 4 ranks.
209 */
210
211struct e752x_pvt {
212 struct pci_dev *bridge_ck;
213 struct pci_dev *dev_d0f0;
214 struct pci_dev *dev_d0f1;
215 u32 tolm;
216 u32 remapbase;
217 u32 remaplimit;
218 int mc_symmetric;
219 u8 map[8];
220 int map_type;
221 const struct e752x_dev_info *dev_info;
222};
223
224struct e752x_dev_info {
225 u16 err_dev;
226 u16 ctl_dev;
227 const char *ctl_name;
228};
229
230struct e752x_error_info {
231 u32 ferr_global;
232 u32 nerr_global;
233 u32 nsi_ferr; /* 3100 only */
234 u32 nsi_nerr; /* 3100 only */
235 u8 hi_ferr; /* all but 3100 */
236 u8 hi_nerr; /* all but 3100 */
237 u16 sysbus_ferr;
238 u16 sysbus_nerr;
239 u8 buf_ferr;
240 u8 buf_nerr;
241 u16 dram_ferr;
242 u16 dram_nerr;
243 u32 dram_sec1_add;
244 u32 dram_sec2_add;
245 u16 dram_sec1_syndrome;
246 u16 dram_sec2_syndrome;
247 u32 dram_ded_add;
248 u32 dram_scrb_add;
249 u32 dram_retr_add;
250};
251
252static const struct e752x_dev_info e752x_devs[] = {
253 [E7520] = {
254 .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR,
255 .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0,
256 .ctl_name = "E7520"},
257 [E7525] = {
258 .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
259 .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0,
260 .ctl_name = "E7525"},
261 [E7320] = {
262 .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
263 .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0,
264 .ctl_name = "E7320"},
265 [I3100] = {
266 .err_dev = PCI_DEVICE_ID_INTEL_3100_1_ERR,
267 .ctl_dev = PCI_DEVICE_ID_INTEL_3100_0,
268 .ctl_name = "3100"},
269};
270
271/* Valid scrub rates for the e752x/3100 hardware memory scrubber. We
272 * map the scrubbing bandwidth to a hardware register value. The 'set'
273 * operation finds the 'matching or higher value'. Note that scrubbing
274 * on the e752x can only be enabled/disabled. The 3100 supports
275 * a normal and fast mode.
276 */
277
278#define SDRATE_EOT 0xFFFFFFFF
279
280struct scrubrate {
281 u32 bandwidth; /* bandwidth consumed by scrubbing in bytes/sec */
282 u16 scrubval; /* register value for scrub rate */
283};
284
285/* Rate below assumes same performance as i3100 using PC3200 DDR2 in
286 * normal mode. e752x bridges don't support choosing normal or fast mode,
287 * so the scrubbing bandwidth value isn't all that important - scrubbing is
288 * either on or off.
289 */
290static const struct scrubrate scrubrates_e752x[] = {
291 {0, 0x00}, /* Scrubbing Off */
292 {500000, 0x02}, /* Scrubbing On */
293 {SDRATE_EOT, 0x00} /* End of Table */
294};
295
296/* Fast mode: 2 GByte PC3200 DDR2 scrubbed in 33s = 63161283 bytes/s
297 * Normal mode: 125 (32000 / 256) times slower than fast mode.
298 */
299static const struct scrubrate scrubrates_i3100[] = {
300 {0, 0x00}, /* Scrubbing Off */
301 {500000, 0x0a}, /* Normal mode - 32k clocks */
302 {62500000, 0x06}, /* Fast mode - 256 clocks */
303 {SDRATE_EOT, 0x00} /* End of Table */
304};
305
306static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
307 unsigned long page)
308{
309 u32 remap;
310 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
311
312 debugf3("%s()\n", __func__);
313
314 if (page < pvt->tolm)
315 return page;
316
317 if ((page >= 0x100000) && (page < pvt->remapbase))
318 return page;
319
320 remap = (page - pvt->tolm) + pvt->remapbase;
321
322 if (remap < pvt->remaplimit)
323 return remap;
324
325 e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
326 return pvt->tolm - 1;
327}
328
329static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
330 u32 sec1_add, u16 sec1_syndrome)
331{
332 u32 page;
333 int row;
334 int channel;
335 int i;
336 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
337
338 debugf3("%s()\n", __func__);
339
340 /* convert the addr to 4k page */
341 page = sec1_add >> (PAGE_SHIFT - 4);
342
343 /* FIXME - check for -1 */
344 if (pvt->mc_symmetric) {
345 /* chip select are bits 14 & 13 */
346 row = ((page >> 1) & 3);
347 e752x_printk(KERN_WARNING,
348 "Test row %d Table %d %d %d %d %d %d %d %d\n", row,
349 pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3],
350 pvt->map[4], pvt->map[5], pvt->map[6],
351 pvt->map[7]);
352
353 /* test for channel remapping */
354 for (i = 0; i < 8; i++) {
355 if (pvt->map[i] == row)
356 break;
357 }
358
359 e752x_printk(KERN_WARNING, "Test computed row %d\n", i);
360
361 if (i < 8)
362 row = i;
363 else
364 e752x_mc_printk(mci, KERN_WARNING,
365 "row %d not found in remap table\n",
366 row);
367 } else
368 row = edac_mc_find_csrow_by_page(mci, page);
369
370 /* 0 = channel A, 1 = channel B */
371 channel = !(error_one & 1);
372
373 /* e752x mc reads 34:6 of the DRAM linear address */
374 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
375 page, offset_in_page(sec1_add << 4), sec1_syndrome,
376 row, channel, -1,
377 "e752x CE", "", NULL);
378}
379
380static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
381 u32 sec1_add, u16 sec1_syndrome, int *error_found,
382 int handle_error)
383{
384 *error_found = 1;
385
386 if (handle_error)
387 do_process_ce(mci, error_one, sec1_add, sec1_syndrome);
388}
389
390static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
391 u32 ded_add, u32 scrb_add)
392{
393 u32 error_2b, block_page;
394 int row;
395 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
396
397 debugf3("%s()\n", __func__);
398
399 if (error_one & 0x0202) {
400 error_2b = ded_add;
401
402 /* convert to 4k address */
403 block_page = error_2b >> (PAGE_SHIFT - 4);
404
405 row = pvt->mc_symmetric ?
406 /* chip select are bits 14 & 13 */
407 ((block_page >> 1) & 3) :
408 edac_mc_find_csrow_by_page(mci, block_page);
409
410 /* e752x mc reads 34:6 of the DRAM linear address */
411 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
412 block_page,
413 offset_in_page(error_2b << 4), 0,
414 row, -1, -1,
415 "e752x UE from Read", "", NULL);
416
417 }
418 if (error_one & 0x0404) {
419 error_2b = scrb_add;
420
421 /* convert to 4k address */
422 block_page = error_2b >> (PAGE_SHIFT - 4);
423
424 row = pvt->mc_symmetric ?
425 /* chip select are bits 14 & 13 */
426 ((block_page >> 1) & 3) :
427 edac_mc_find_csrow_by_page(mci, block_page);
428
429 /* e752x mc reads 34:6 of the DRAM linear address */
430 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
431 block_page,
432 offset_in_page(error_2b << 4), 0,
433 row, -1, -1,
434 "e752x UE from Scruber", "", NULL);
435 }
436}
437
438static inline void process_ue(struct mem_ctl_info *mci, u16 error_one,
439 u32 ded_add, u32 scrb_add, int *error_found,
440 int handle_error)
441{
442 *error_found = 1;
443
444 if (handle_error)
445 do_process_ue(mci, error_one, ded_add, scrb_add);
446}
447
448static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
449 int *error_found, int handle_error)
450{
451 *error_found = 1;
452
453 if (!handle_error)
454 return;
455
456 debugf3("%s()\n", __func__);
457 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 0, 0, 0,
458 -1, -1, -1,
459 "e752x UE log memory write", "", NULL);
460}
461
462static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
463 u32 retry_add)
464{
465 u32 error_1b, page;
466 int row;
467 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
468
469 error_1b = retry_add;
470 page = error_1b >> (PAGE_SHIFT - 4); /* convert the addr to 4k page */
471
472 /* chip select are bits 14 & 13 */
473 row = pvt->mc_symmetric ? ((page >> 1) & 3) :
474 edac_mc_find_csrow_by_page(mci, page);
475
476 e752x_mc_printk(mci, KERN_WARNING,
477 "CE page 0x%lx, row %d : Memory read retry\n",
478 (long unsigned int)page, row);
479}
480
481static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error,
482 u32 retry_add, int *error_found,
483 int handle_error)
484{
485 *error_found = 1;
486
487 if (handle_error)
488 do_process_ded_retry(mci, error, retry_add);
489}
490
491static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error,
492 int *error_found, int handle_error)
493{
494 *error_found = 1;
495
496 if (handle_error)
497 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n");
498}
499
500static char *global_message[11] = {
501 "PCI Express C1",
502 "PCI Express C",
503 "PCI Express B1",
504 "PCI Express B",
505 "PCI Express A1",
506 "PCI Express A",
507 "DMA Controller",
508 "HUB or NS Interface",
509 "System Bus",
510 "DRAM Controller", /* 9th entry */
511 "Internal Buffer"
512};
513
514#define DRAM_ENTRY 9
515
516static char *fatal_message[2] = { "Non-Fatal ", "Fatal " };
517
518static void do_global_error(int fatal, u32 errors)
519{
520 int i;
521
522 for (i = 0; i < 11; i++) {
523 if (errors & (1 << i)) {
524 /* If the error is from DRAM Controller OR
525 * we are to report ALL errors, then
526 * report the error
527 */
528 if ((i == DRAM_ENTRY) || report_non_memory_errors)
529 e752x_printk(KERN_WARNING, "%sError %s\n",
530 fatal_message[fatal],
531 global_message[i]);
532 }
533 }
534}
535
536static inline void global_error(int fatal, u32 errors, int *error_found,
537 int handle_error)
538{
539 *error_found = 1;
540
541 if (handle_error)
542 do_global_error(fatal, errors);
543}
544
545static char *hub_message[7] = {
546 "HI Address or Command Parity", "HI Illegal Access",
547 "HI Internal Parity", "Out of Range Access",
548 "HI Data Parity", "Enhanced Config Access",
549 "Hub Interface Target Abort"
550};
551
552static void do_hub_error(int fatal, u8 errors)
553{
554 int i;
555
556 for (i = 0; i < 7; i++) {
557 if (errors & (1 << i))
558 e752x_printk(KERN_WARNING, "%sError %s\n",
559 fatal_message[fatal], hub_message[i]);
560 }
561}
562
563static inline void hub_error(int fatal, u8 errors, int *error_found,
564 int handle_error)
565{
566 *error_found = 1;
567
568 if (handle_error)
569 do_hub_error(fatal, errors);
570}
571
572#define NSI_FATAL_MASK 0x0c080081
573#define NSI_NON_FATAL_MASK 0x23a0ba64
574#define NSI_ERR_MASK (NSI_FATAL_MASK | NSI_NON_FATAL_MASK)
575
576static char *nsi_message[30] = {
577 "NSI Link Down", /* NSI_FERR/NSI_NERR bit 0, fatal error */
578 "", /* reserved */
579 "NSI Parity Error", /* bit 2, non-fatal */
580 "", /* reserved */
581 "", /* reserved */
582 "Correctable Error Message", /* bit 5, non-fatal */
583 "Non-Fatal Error Message", /* bit 6, non-fatal */
584 "Fatal Error Message", /* bit 7, fatal */
585 "", /* reserved */
586 "Receiver Error", /* bit 9, non-fatal */
587 "", /* reserved */
588 "Bad TLP", /* bit 11, non-fatal */
589 "Bad DLLP", /* bit 12, non-fatal */
590 "REPLAY_NUM Rollover", /* bit 13, non-fatal */
591 "", /* reserved */
592 "Replay Timer Timeout", /* bit 15, non-fatal */
593 "", /* reserved */
594 "", /* reserved */
595 "", /* reserved */
596 "Data Link Protocol Error", /* bit 19, fatal */
597 "", /* reserved */
598 "Poisoned TLP", /* bit 21, non-fatal */
599 "", /* reserved */
600 "Completion Timeout", /* bit 23, non-fatal */
601 "Completer Abort", /* bit 24, non-fatal */
602 "Unexpected Completion", /* bit 25, non-fatal */
603 "Receiver Overflow", /* bit 26, fatal */
604 "Malformed TLP", /* bit 27, fatal */
605 "", /* reserved */
606 "Unsupported Request" /* bit 29, non-fatal */
607};
608
609static void do_nsi_error(int fatal, u32 errors)
610{
611 int i;
612
613 for (i = 0; i < 30; i++) {
614 if (errors & (1 << i))
615 printk(KERN_WARNING "%sError %s\n",
616 fatal_message[fatal], nsi_message[i]);
617 }
618}
619
620static inline void nsi_error(int fatal, u32 errors, int *error_found,
621 int handle_error)
622{
623 *error_found = 1;
624
625 if (handle_error)
626 do_nsi_error(fatal, errors);
627}
628
629static char *membuf_message[4] = {
630 "Internal PMWB to DRAM parity",
631 "Internal PMWB to System Bus Parity",
632 "Internal System Bus or IO to PMWB Parity",
633 "Internal DRAM to PMWB Parity"
634};
635
636static void do_membuf_error(u8 errors)
637{
638 int i;
639
640 for (i = 0; i < 4; i++) {
641 if (errors & (1 << i))
642 e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n",
643 membuf_message[i]);
644 }
645}
646
647static inline void membuf_error(u8 errors, int *error_found, int handle_error)
648{
649 *error_found = 1;
650
651 if (handle_error)
652 do_membuf_error(errors);
653}
654
655static char *sysbus_message[10] = {
656 "Addr or Request Parity",
657 "Data Strobe Glitch",
658 "Addr Strobe Glitch",
659 "Data Parity",
660 "Addr Above TOM",
661 "Non DRAM Lock Error",
662 "MCERR", "BINIT",
663 "Memory Parity",
664 "IO Subsystem Parity"
665};
666
667static void do_sysbus_error(int fatal, u32 errors)
668{
669 int i;
670
671 for (i = 0; i < 10; i++) {
672 if (errors & (1 << i))
673 e752x_printk(KERN_WARNING, "%sError System Bus %s\n",
674 fatal_message[fatal], sysbus_message[i]);
675 }
676}
677
678static inline void sysbus_error(int fatal, u32 errors, int *error_found,
679 int handle_error)
680{
681 *error_found = 1;
682
683 if (handle_error)
684 do_sysbus_error(fatal, errors);
685}
686
687static void e752x_check_hub_interface(struct e752x_error_info *info,
688 int *error_found, int handle_error)
689{
690 u8 stat8;
691
692 //pci_read_config_byte(dev,E752X_HI_FERR,&stat8);
693
694 stat8 = info->hi_ferr;
695
696 if (stat8 & 0x7f) { /* Error, so process */
697 stat8 &= 0x7f;
698
699 if (stat8 & 0x2b)
700 hub_error(1, stat8 & 0x2b, error_found, handle_error);
701
702 if (stat8 & 0x54)
703 hub_error(0, stat8 & 0x54, error_found, handle_error);
704 }
705 //pci_read_config_byte(dev,E752X_HI_NERR,&stat8);
706
707 stat8 = info->hi_nerr;
708
709 if (stat8 & 0x7f) { /* Error, so process */
710 stat8 &= 0x7f;
711
712 if (stat8 & 0x2b)
713 hub_error(1, stat8 & 0x2b, error_found, handle_error);
714
715 if (stat8 & 0x54)
716 hub_error(0, stat8 & 0x54, error_found, handle_error);
717 }
718}
719
720static void e752x_check_ns_interface(struct e752x_error_info *info,
721 int *error_found, int handle_error)
722{
723 u32 stat32;
724
725 stat32 = info->nsi_ferr;
726 if (stat32 & NSI_ERR_MASK) { /* Error, so process */
727 if (stat32 & NSI_FATAL_MASK) /* check for fatal errors */
728 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
729 handle_error);
730 if (stat32 & NSI_NON_FATAL_MASK) /* check for non-fatal ones */
731 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
732 handle_error);
733 }
734 stat32 = info->nsi_nerr;
735 if (stat32 & NSI_ERR_MASK) {
736 if (stat32 & NSI_FATAL_MASK)
737 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
738 handle_error);
739 if (stat32 & NSI_NON_FATAL_MASK)
740 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
741 handle_error);
742 }
743}
744
745static void e752x_check_sysbus(struct e752x_error_info *info,
746 int *error_found, int handle_error)
747{
748 u32 stat32, error32;
749
750 //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32);
751 stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16);
752
753 if (stat32 == 0)
754 return; /* no errors */
755
756 error32 = (stat32 >> 16) & 0x3ff;
757 stat32 = stat32 & 0x3ff;
758
759 if (stat32 & 0x087)
760 sysbus_error(1, stat32 & 0x087, error_found, handle_error);
761
762 if (stat32 & 0x378)
763 sysbus_error(0, stat32 & 0x378, error_found, handle_error);
764
765 if (error32 & 0x087)
766 sysbus_error(1, error32 & 0x087, error_found, handle_error);
767
768 if (error32 & 0x378)
769 sysbus_error(0, error32 & 0x378, error_found, handle_error);
770}
771
772static void e752x_check_membuf(struct e752x_error_info *info,
773 int *error_found, int handle_error)
774{
775 u8 stat8;
776
777 stat8 = info->buf_ferr;
778
779 if (stat8 & 0x0f) { /* Error, so process */
780 stat8 &= 0x0f;
781 membuf_error(stat8, error_found, handle_error);
782 }
783
784 stat8 = info->buf_nerr;
785
786 if (stat8 & 0x0f) { /* Error, so process */
787 stat8 &= 0x0f;
788 membuf_error(stat8, error_found, handle_error);
789 }
790}
791
792static void e752x_check_dram(struct mem_ctl_info *mci,
793 struct e752x_error_info *info, int *error_found,
794 int handle_error)
795{
796 u16 error_one, error_next;
797
798 error_one = info->dram_ferr;
799 error_next = info->dram_nerr;
800
801 /* decode and report errors */
802 if (error_one & 0x0101) /* check first error correctable */
803 process_ce(mci, error_one, info->dram_sec1_add,
804 info->dram_sec1_syndrome, error_found, handle_error);
805
806 if (error_next & 0x0101) /* check next error correctable */
807 process_ce(mci, error_next, info->dram_sec2_add,
808 info->dram_sec2_syndrome, error_found, handle_error);
809
810 if (error_one & 0x4040)
811 process_ue_no_info_wr(mci, error_found, handle_error);
812
813 if (error_next & 0x4040)
814 process_ue_no_info_wr(mci, error_found, handle_error);
815
816 if (error_one & 0x2020)
817 process_ded_retry(mci, error_one, info->dram_retr_add,
818 error_found, handle_error);
819
820 if (error_next & 0x2020)
821 process_ded_retry(mci, error_next, info->dram_retr_add,
822 error_found, handle_error);
823
824 if (error_one & 0x0808)
825 process_threshold_ce(mci, error_one, error_found, handle_error);
826
827 if (error_next & 0x0808)
828 process_threshold_ce(mci, error_next, error_found,
829 handle_error);
830
831 if (error_one & 0x0606)
832 process_ue(mci, error_one, info->dram_ded_add,
833 info->dram_scrb_add, error_found, handle_error);
834
835 if (error_next & 0x0606)
836 process_ue(mci, error_next, info->dram_ded_add,
837 info->dram_scrb_add, error_found, handle_error);
838}
839
840static void e752x_get_error_info(struct mem_ctl_info *mci,
841 struct e752x_error_info *info)
842{
843 struct pci_dev *dev;
844 struct e752x_pvt *pvt;
845
846 memset(info, 0, sizeof(*info));
847 pvt = (struct e752x_pvt *)mci->pvt_info;
848 dev = pvt->dev_d0f1;
849 pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global);
850
851 if (info->ferr_global) {
852 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
853 pci_read_config_dword(dev, I3100_NSI_FERR,
854 &info->nsi_ferr);
855 info->hi_ferr = 0;
856 } else {
857 pci_read_config_byte(dev, E752X_HI_FERR,
858 &info->hi_ferr);
859 info->nsi_ferr = 0;
860 }
861 pci_read_config_word(dev, E752X_SYSBUS_FERR,
862 &info->sysbus_ferr);
863 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr);
864 pci_read_config_word(dev, E752X_DRAM_FERR, &info->dram_ferr);
865 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD,
866 &info->dram_sec1_add);
867 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME,
868 &info->dram_sec1_syndrome);
869 pci_read_config_dword(dev, E752X_DRAM_DED_ADD,
870 &info->dram_ded_add);
871 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD,
872 &info->dram_scrb_add);
873 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD,
874 &info->dram_retr_add);
875
876 /* ignore the reserved bits just in case */
877 if (info->hi_ferr & 0x7f)
878 pci_write_config_byte(dev, E752X_HI_FERR,
879 info->hi_ferr);
880
881 if (info->nsi_ferr & NSI_ERR_MASK)
882 pci_write_config_dword(dev, I3100_NSI_FERR,
883 info->nsi_ferr);
884
885 if (info->sysbus_ferr)
886 pci_write_config_word(dev, E752X_SYSBUS_FERR,
887 info->sysbus_ferr);
888
889 if (info->buf_ferr & 0x0f)
890 pci_write_config_byte(dev, E752X_BUF_FERR,
891 info->buf_ferr);
892
893 if (info->dram_ferr)
894 pci_write_bits16(pvt->bridge_ck, E752X_DRAM_FERR,
895 info->dram_ferr, info->dram_ferr);
896
897 pci_write_config_dword(dev, E752X_FERR_GLOBAL,
898 info->ferr_global);
899 }
900
901 pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global);
902
903 if (info->nerr_global) {
904 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
905 pci_read_config_dword(dev, I3100_NSI_NERR,
906 &info->nsi_nerr);
907 info->hi_nerr = 0;
908 } else {
909 pci_read_config_byte(dev, E752X_HI_NERR,
910 &info->hi_nerr);
911 info->nsi_nerr = 0;
912 }
913 pci_read_config_word(dev, E752X_SYSBUS_NERR,
914 &info->sysbus_nerr);
915 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr);
916 pci_read_config_word(dev, E752X_DRAM_NERR, &info->dram_nerr);
917 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD,
918 &info->dram_sec2_add);
919 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME,
920 &info->dram_sec2_syndrome);
921
922 if (info->hi_nerr & 0x7f)
923 pci_write_config_byte(dev, E752X_HI_NERR,
924 info->hi_nerr);
925
926 if (info->nsi_nerr & NSI_ERR_MASK)
927 pci_write_config_dword(dev, I3100_NSI_NERR,
928 info->nsi_nerr);
929
930 if (info->sysbus_nerr)
931 pci_write_config_word(dev, E752X_SYSBUS_NERR,
932 info->sysbus_nerr);
933
934 if (info->buf_nerr & 0x0f)
935 pci_write_config_byte(dev, E752X_BUF_NERR,
936 info->buf_nerr);
937
938 if (info->dram_nerr)
939 pci_write_bits16(pvt->bridge_ck, E752X_DRAM_NERR,
940 info->dram_nerr, info->dram_nerr);
941
942 pci_write_config_dword(dev, E752X_NERR_GLOBAL,
943 info->nerr_global);
944 }
945}
946
947static int e752x_process_error_info(struct mem_ctl_info *mci,
948 struct e752x_error_info *info,
949 int handle_errors)
950{
951 u32 error32, stat32;
952 int error_found;
953
954 error_found = 0;
955 error32 = (info->ferr_global >> 18) & 0x3ff;
956 stat32 = (info->ferr_global >> 4) & 0x7ff;
957
958 if (error32)
959 global_error(1, error32, &error_found, handle_errors);
960
961 if (stat32)
962 global_error(0, stat32, &error_found, handle_errors);
963
964 error32 = (info->nerr_global >> 18) & 0x3ff;
965 stat32 = (info->nerr_global >> 4) & 0x7ff;
966
967 if (error32)
968 global_error(1, error32, &error_found, handle_errors);
969
970 if (stat32)
971 global_error(0, stat32, &error_found, handle_errors);
972
973 e752x_check_hub_interface(info, &error_found, handle_errors);
974 e752x_check_ns_interface(info, &error_found, handle_errors);
975 e752x_check_sysbus(info, &error_found, handle_errors);
976 e752x_check_membuf(info, &error_found, handle_errors);
977 e752x_check_dram(mci, info, &error_found, handle_errors);
978 return error_found;
979}
980
981static void e752x_check(struct mem_ctl_info *mci)
982{
983 struct e752x_error_info info;
984
985 debugf3("%s()\n", __func__);
986 e752x_get_error_info(mci, &info);
987 e752x_process_error_info(mci, &info, 1);
988}
989
990/* Program byte/sec bandwidth scrub rate to hardware */
991static int set_sdram_scrub_rate(struct mem_ctl_info *mci, u32 new_bw)
992{
993 const struct scrubrate *scrubrates;
994 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
995 struct pci_dev *pdev = pvt->dev_d0f0;
996 int i;
997
998 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
999 scrubrates = scrubrates_i3100;
1000 else
1001 scrubrates = scrubrates_e752x;
1002
1003 /* Translate the desired scrub rate to a e752x/3100 register value.
1004 * Search for the bandwidth that is equal or greater than the
1005 * desired rate and program the cooresponding register value.
1006 */
1007 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1008 if (scrubrates[i].bandwidth >= new_bw)
1009 break;
1010
1011 if (scrubrates[i].bandwidth == SDRATE_EOT)
1012 return -1;
1013
1014 pci_write_config_word(pdev, E752X_MCHSCRB, scrubrates[i].scrubval);
1015
1016 return scrubrates[i].bandwidth;
1017}
1018
1019/* Convert current scrub rate value into byte/sec bandwidth */
1020static int get_sdram_scrub_rate(struct mem_ctl_info *mci)
1021{
1022 const struct scrubrate *scrubrates;
1023 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
1024 struct pci_dev *pdev = pvt->dev_d0f0;
1025 u16 scrubval;
1026 int i;
1027
1028 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
1029 scrubrates = scrubrates_i3100;
1030 else
1031 scrubrates = scrubrates_e752x;
1032
1033 /* Find the bandwidth matching the memory scrubber configuration */
1034 pci_read_config_word(pdev, E752X_MCHSCRB, &scrubval);
1035 scrubval = scrubval & 0x0f;
1036
1037 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1038 if (scrubrates[i].scrubval == scrubval)
1039 break;
1040
1041 if (scrubrates[i].bandwidth == SDRATE_EOT) {
1042 e752x_printk(KERN_WARNING,
1043 "Invalid sdram scrub control value: 0x%x\n", scrubval);
1044 return -1;
1045 }
1046 return scrubrates[i].bandwidth;
1047
1048}
1049
1050/* Return 1 if dual channel mode is active. Else return 0. */
1051static inline int dual_channel_active(u16 ddrcsr)
1052{
1053 return (((ddrcsr >> 12) & 3) == 3);
1054}
1055
1056/* Remap csrow index numbers if map_type is "reverse"
1057 */
1058static inline int remap_csrow_index(struct mem_ctl_info *mci, int index)
1059{
1060 struct e752x_pvt *pvt = mci->pvt_info;
1061
1062 if (!pvt->map_type)
1063 return (7 - index);
1064
1065 return (index);
1066}
1067
1068static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
1069 u16 ddrcsr)
1070{
1071 struct csrow_info *csrow;
1072 unsigned long last_cumul_size;
1073 int index, mem_dev, drc_chan;
1074 int drc_drbg; /* DRB granularity 0=64mb, 1=128mb */
1075 int drc_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */
1076 u8 value;
1077 u32 dra, drc, cumul_size, i, nr_pages;
1078
1079 dra = 0;
1080 for (index = 0; index < 4; index++) {
1081 u8 dra_reg;
1082 pci_read_config_byte(pdev, E752X_DRA + index, &dra_reg);
1083 dra |= dra_reg << (index * 8);
1084 }
1085 pci_read_config_dword(pdev, E752X_DRC, &drc);
1086 drc_chan = dual_channel_active(ddrcsr) ? 1 : 0;
1087 drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */
1088 drc_ddim = (drc >> 20) & 0x3;
1089
1090 /* The dram row boundary (DRB) reg values are boundary address for
1091 * each DRAM row with a granularity of 64 or 128MB (single/dual
1092 * channel operation). DRB regs are cumulative; therefore DRB7 will
1093 * contain the total memory contained in all eight rows.
1094 */
1095 for (last_cumul_size = index = 0; index < mci->nr_csrows; index++) {
1096 /* mem_dev 0=x8, 1=x4 */
1097 mem_dev = (dra >> (index * 4 + 2)) & 0x3;
1098 csrow = &mci->csrows[remap_csrow_index(mci, index)];
1099
1100 mem_dev = (mem_dev == 2);
1101 pci_read_config_byte(pdev, E752X_DRB + index, &value);
1102 /* convert a 128 or 64 MiB DRB to a page size. */
1103 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
1104 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
1105 cumul_size);
1106 if (cumul_size == last_cumul_size)
1107 continue; /* not populated */
1108
1109 csrow->first_page = last_cumul_size;
1110 csrow->last_page = cumul_size - 1;
1111 nr_pages = cumul_size - last_cumul_size;
1112 last_cumul_size = cumul_size;
1113
1114 for (i = 0; i < csrow->nr_channels; i++) {
1115 struct dimm_info *dimm = csrow->channels[i].dimm;
1116
1117 debugf3("Initializing rank at (%i,%i)\n", index, i);
1118 dimm->nr_pages = nr_pages / csrow->nr_channels;
1119 dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
1120 dimm->mtype = MEM_RDDR; /* only one type supported */
1121 dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
1122
1123 /*
1124 * if single channel or x8 devices then SECDED
1125 * if dual channel and x4 then S4ECD4ED
1126 */
1127 if (drc_ddim) {
1128 if (drc_chan && mem_dev) {
1129 dimm->edac_mode = EDAC_S4ECD4ED;
1130 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
1131 } else {
1132 dimm->edac_mode = EDAC_SECDED;
1133 mci->edac_cap |= EDAC_FLAG_SECDED;
1134 }
1135 } else
1136 dimm->edac_mode = EDAC_NONE;
1137 }
1138 }
1139}
1140
1141static void e752x_init_mem_map_table(struct pci_dev *pdev,
1142 struct e752x_pvt *pvt)
1143{
1144 int index;
1145 u8 value, last, row;
1146
1147 last = 0;
1148 row = 0;
1149
1150 for (index = 0; index < 8; index += 2) {
1151 pci_read_config_byte(pdev, E752X_DRB + index, &value);
1152 /* test if there is a dimm in this slot */
1153 if (value == last) {
1154 /* no dimm in the slot, so flag it as empty */
1155 pvt->map[index] = 0xff;
1156 pvt->map[index + 1] = 0xff;
1157 } else { /* there is a dimm in the slot */
1158 pvt->map[index] = row;
1159 row++;
1160 last = value;
1161 /* test the next value to see if the dimm is double
1162 * sided
1163 */
1164 pci_read_config_byte(pdev, E752X_DRB + index + 1,
1165 &value);
1166
1167 /* the dimm is single sided, so flag as empty */
1168 /* this is a double sided dimm to save the next row #*/
1169 pvt->map[index + 1] = (value == last) ? 0xff : row;
1170 row++;
1171 last = value;
1172 }
1173 }
1174}
1175
1176/* Return 0 on success or 1 on failure. */
1177static int e752x_get_devs(struct pci_dev *pdev, int dev_idx,
1178 struct e752x_pvt *pvt)
1179{
1180 struct pci_dev *dev;
1181
1182 pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
1183 pvt->dev_info->err_dev, pvt->bridge_ck);
1184
1185 if (pvt->bridge_ck == NULL)
1186 pvt->bridge_ck = pci_scan_single_device(pdev->bus,
1187 PCI_DEVFN(0, 1));
1188
1189 if (pvt->bridge_ck == NULL) {
1190 e752x_printk(KERN_ERR, "error reporting device not found:"
1191 "vendor %x device 0x%x (broken BIOS?)\n",
1192 PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
1193 return 1;
1194 }
1195
1196 dev = pci_get_device(PCI_VENDOR_ID_INTEL,
1197 e752x_devs[dev_idx].ctl_dev,
1198 NULL);
1199
1200 if (dev == NULL)
1201 goto fail;
1202
1203 pvt->dev_d0f0 = dev;
1204 pvt->dev_d0f1 = pci_dev_get(pvt->bridge_ck);
1205
1206 return 0;
1207
1208fail:
1209 pci_dev_put(pvt->bridge_ck);
1210 return 1;
1211}
1212
1213/* Setup system bus parity mask register.
1214 * Sysbus parity supported on:
1215 * e7320/e7520/e7525 + Xeon
1216 */
1217static void e752x_init_sysbus_parity_mask(struct e752x_pvt *pvt)
1218{
1219 char *cpu_id = cpu_data(0).x86_model_id;
1220 struct pci_dev *dev = pvt->dev_d0f1;
1221 int enable = 1;
1222
1223 /* Allow module parameter override, else see if CPU supports parity */
1224 if (sysbus_parity != -1) {
1225 enable = sysbus_parity;
1226 } else if (cpu_id[0] && !strstr(cpu_id, "Xeon")) {
1227 e752x_printk(KERN_INFO, "System Bus Parity not "
1228 "supported by CPU, disabling\n");
1229 enable = 0;
1230 }
1231
1232 if (enable)
1233 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0000);
1234 else
1235 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0309);
1236}
1237
1238static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt)
1239{
1240 struct pci_dev *dev;
1241
1242 dev = pvt->dev_d0f1;
1243 /* Turn off error disable & SMI in case the BIOS turned it on */
1244 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
1245 pci_write_config_dword(dev, I3100_NSI_EMASK, 0);
1246 pci_write_config_dword(dev, I3100_NSI_SMICMD, 0);
1247 } else {
1248 pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00);
1249 pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00);
1250 }
1251
1252 e752x_init_sysbus_parity_mask(pvt);
1253
1254 pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00);
1255 pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00);
1256 pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00);
1257 pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00);
1258 pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00);
1259}
1260
1261static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
1262{
1263 u16 pci_data;
1264 u8 stat8;
1265 struct mem_ctl_info *mci;
1266 struct edac_mc_layer layers[2];
1267 struct e752x_pvt *pvt;
1268 u16 ddrcsr;
1269 int drc_chan; /* Number of channels 0=1chan,1=2chan */
1270 struct e752x_error_info discard;
1271
1272 debugf0("%s(): mci\n", __func__);
1273 debugf0("Starting Probe1\n");
1274
1275 /* check to see if device 0 function 1 is enabled; if it isn't, we
1276 * assume the BIOS has reserved it for a reason and is expecting
1277 * exclusive access, we take care not to violate that assumption and
1278 * fail the probe. */
1279 pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
1280 if (!force_function_unhide && !(stat8 & (1 << 5))) {
1281 printk(KERN_INFO "Contact your BIOS vendor to see if the "
1282 "E752x error registers can be safely un-hidden\n");
1283 return -ENODEV;
1284 }
1285 stat8 |= (1 << 5);
1286 pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
1287
1288 pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr);
1289 /* FIXME: should check >>12 or 0xf, true for all? */
1290 /* Dual channel = 1, Single channel = 0 */
1291 drc_chan = dual_channel_active(ddrcsr);
1292
1293 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
1294 layers[0].size = E752X_NR_CSROWS;
1295 layers[0].is_virt_csrow = true;
1296 layers[1].type = EDAC_MC_LAYER_CHANNEL;
1297 layers[1].size = drc_chan + 1;
1298 layers[1].is_virt_csrow = false;
1299 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
1300 if (mci == NULL)
1301 return -ENOMEM;
1302
1303 debugf3("%s(): init mci\n", __func__);
1304 mci->mtype_cap = MEM_FLAG_RDDR;
1305 /* 3100 IMCH supports SECDEC only */
1306 mci->edac_ctl_cap = (dev_idx == I3100) ? EDAC_FLAG_SECDED :
1307 (EDAC_FLAG_NONE | EDAC_FLAG_SECDED | EDAC_FLAG_S4ECD4ED);
1308 /* FIXME - what if different memory types are in different csrows? */
1309 mci->mod_name = EDAC_MOD_STR;
1310 mci->mod_ver = E752X_REVISION;
1311 mci->dev = &pdev->dev;
1312
1313 debugf3("%s(): init pvt\n", __func__);
1314 pvt = (struct e752x_pvt *)mci->pvt_info;
1315 pvt->dev_info = &e752x_devs[dev_idx];
1316 pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
1317
1318 if (e752x_get_devs(pdev, dev_idx, pvt)) {
1319 edac_mc_free(mci);
1320 return -ENODEV;
1321 }
1322
1323 debugf3("%s(): more mci init\n", __func__);
1324 mci->ctl_name = pvt->dev_info->ctl_name;
1325 mci->dev_name = pci_name(pdev);
1326 mci->edac_check = e752x_check;
1327 mci->ctl_page_to_phys = ctl_page_to_phys;
1328 mci->set_sdram_scrub_rate = set_sdram_scrub_rate;
1329 mci->get_sdram_scrub_rate = get_sdram_scrub_rate;
1330
1331 /* set the map type. 1 = normal, 0 = reversed
1332 * Must be set before e752x_init_csrows in case csrow mapping
1333 * is reversed.
1334 */
1335 pci_read_config_byte(pdev, E752X_DRM, &stat8);
1336 pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
1337
1338 e752x_init_csrows(mci, pdev, ddrcsr);
1339 e752x_init_mem_map_table(pdev, pvt);
1340
1341 if (dev_idx == I3100)
1342 mci->edac_cap = EDAC_FLAG_SECDED; /* the only mode supported */
1343 else
1344 mci->edac_cap |= EDAC_FLAG_NONE;
1345 debugf3("%s(): tolm, remapbase, remaplimit\n", __func__);
1346
1347 /* load the top of low memory, remap base, and remap limit vars */
1348 pci_read_config_word(pdev, E752X_TOLM, &pci_data);
1349 pvt->tolm = ((u32) pci_data) << 4;
1350 pci_read_config_word(pdev, E752X_REMAPBASE, &pci_data);
1351 pvt->remapbase = ((u32) pci_data) << 14;
1352 pci_read_config_word(pdev, E752X_REMAPLIMIT, &pci_data);
1353 pvt->remaplimit = ((u32) pci_data) << 14;
1354 e752x_printk(KERN_INFO,
1355 "tolm = %x, remapbase = %x, remaplimit = %x\n",
1356 pvt->tolm, pvt->remapbase, pvt->remaplimit);
1357
1358 /* Here we assume that we will never see multiple instances of this
1359 * type of memory controller. The ID is therefore hardcoded to 0.
1360 */
1361 if (edac_mc_add_mc(mci)) {
1362 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
1363 goto fail;
1364 }
1365
1366 e752x_init_error_reporting_regs(pvt);
1367 e752x_get_error_info(mci, &discard); /* clear other MCH errors */
1368
1369 /* allocating generic PCI control info */
1370 e752x_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
1371 if (!e752x_pci) {
1372 printk(KERN_WARNING
1373 "%s(): Unable to create PCI control\n", __func__);
1374 printk(KERN_WARNING
1375 "%s(): PCI error report via EDAC not setup\n",
1376 __func__);
1377 }
1378
1379 /* get this far and it's successful */
1380 debugf3("%s(): success\n", __func__);
1381 return 0;
1382
1383fail:
1384 pci_dev_put(pvt->dev_d0f0);
1385 pci_dev_put(pvt->dev_d0f1);
1386 pci_dev_put(pvt->bridge_ck);
1387 edac_mc_free(mci);
1388
1389 return -ENODEV;
1390}
1391
1392/* returns count (>= 0), or negative on error */
1393static int __devinit e752x_init_one(struct pci_dev *pdev,
1394 const struct pci_device_id *ent)
1395{
1396 debugf0("%s()\n", __func__);
1397
1398 /* wake up and enable device */
1399 if (pci_enable_device(pdev) < 0)
1400 return -EIO;
1401
1402 return e752x_probe1(pdev, ent->driver_data);
1403}
1404
1405static void __devexit e752x_remove_one(struct pci_dev *pdev)
1406{
1407 struct mem_ctl_info *mci;
1408 struct e752x_pvt *pvt;
1409
1410 debugf0("%s()\n", __func__);
1411
1412 if (e752x_pci)
1413 edac_pci_release_generic_ctl(e752x_pci);
1414
1415 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
1416 return;
1417
1418 pvt = (struct e752x_pvt *)mci->pvt_info;
1419 pci_dev_put(pvt->dev_d0f0);
1420 pci_dev_put(pvt->dev_d0f1);
1421 pci_dev_put(pvt->bridge_ck);
1422 edac_mc_free(mci);
1423}
1424
1425static DEFINE_PCI_DEVICE_TABLE(e752x_pci_tbl) = {
1426 {
1427 PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1428 E7520},
1429 {
1430 PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1431 E7525},
1432 {
1433 PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1434 E7320},
1435 {
1436 PCI_VEND_DEV(INTEL, 3100_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1437 I3100},
1438 {
1439 0,
1440 } /* 0 terminated list. */
1441};
1442
1443MODULE_DEVICE_TABLE(pci, e752x_pci_tbl);
1444
1445static struct pci_driver e752x_driver = {
1446 .name = EDAC_MOD_STR,
1447 .probe = e752x_init_one,
1448 .remove = __devexit_p(e752x_remove_one),
1449 .id_table = e752x_pci_tbl,
1450};
1451
1452static int __init e752x_init(void)
1453{
1454 int pci_rc;
1455
1456 debugf3("%s()\n", __func__);
1457
1458 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
1459 opstate_init();
1460
1461 pci_rc = pci_register_driver(&e752x_driver);
1462 return (pci_rc < 0) ? pci_rc : 0;
1463}
1464
1465static void __exit e752x_exit(void)
1466{
1467 debugf3("%s()\n", __func__);
1468 pci_unregister_driver(&e752x_driver);
1469}
1470
1471module_init(e752x_init);
1472module_exit(e752x_exit);
1473
1474MODULE_LICENSE("GPL");
1475MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n");
1476MODULE_DESCRIPTION("MC support for Intel e752x/3100 memory controllers");
1477
1478module_param(force_function_unhide, int, 0444);
1479MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:"
1480 " 1=force unhide and hope BIOS doesn't fight driver for "
1481 "Dev0:Fun1 access");
1482
1483module_param(edac_op_state, int, 0444);
1484MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
1485
1486module_param(sysbus_parity, int, 0444);
1487MODULE_PARM_DESC(sysbus_parity, "0=disable system bus parity checking,"
1488 " 1=enable system bus parity checking, default=auto-detect");
1489module_param(report_non_memory_errors, int, 0644);
1490MODULE_PARM_DESC(report_non_memory_errors, "0=disable non-memory error "
1491 "reporting, 1=enable non-memory error reporting");