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mm: vma_adjust: remove superfluous check for next not NULL
[linux/fpc-iii.git] / drivers / edac / e752x_edac.c
blobb2d71388172bc4082cff91483a4cc23ca1b85c4b
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
32 static int report_non_memory_errors;
33 static int force_function_unhide;
34 static int sysbus_parity = -1;
35
36 static 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
185 enum 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
211 struct e752x_pvt {
212 struct pci_dev *dev_d0f0;
213 struct pci_dev *dev_d0f1;
214 u32 tolm;
215 u32 remapbase;
216 u32 remaplimit;
217 int mc_symmetric;
218 u8 map[8];
219 int map_type;
220 const struct e752x_dev_info *dev_info;
221 };
222
223 struct e752x_dev_info {
224 u16 err_dev;
225 u16 ctl_dev;
226 const char *ctl_name;
227 };
228
229 struct e752x_error_info {
230 u32 ferr_global;
231 u32 nerr_global;
232 u32 nsi_ferr; /* 3100 only */
233 u32 nsi_nerr; /* 3100 only */
234 u8 hi_ferr; /* all but 3100 */
235 u8 hi_nerr; /* all but 3100 */
236 u16 sysbus_ferr;
237 u16 sysbus_nerr;
238 u8 buf_ferr;
239 u8 buf_nerr;
240 u16 dram_ferr;
241 u16 dram_nerr;
242 u32 dram_sec1_add;
243 u32 dram_sec2_add;
244 u16 dram_sec1_syndrome;
245 u16 dram_sec2_syndrome;
246 u32 dram_ded_add;
247 u32 dram_scrb_add;
248 u32 dram_retr_add;
249 };
250
251 static const struct e752x_dev_info e752x_devs[] = {
252 [E7520] = {
253 .err_dev = PCI_DEVICE_ID_INTEL_7520_1_ERR,
254 .ctl_dev = PCI_DEVICE_ID_INTEL_7520_0,
255 .ctl_name = "E7520"},
256 [E7525] = {
257 .err_dev = PCI_DEVICE_ID_INTEL_7525_1_ERR,
258 .ctl_dev = PCI_DEVICE_ID_INTEL_7525_0,
259 .ctl_name = "E7525"},
260 [E7320] = {
261 .err_dev = PCI_DEVICE_ID_INTEL_7320_1_ERR,
262 .ctl_dev = PCI_DEVICE_ID_INTEL_7320_0,
263 .ctl_name = "E7320"},
264 [I3100] = {
265 .err_dev = PCI_DEVICE_ID_INTEL_3100_1_ERR,
266 .ctl_dev = PCI_DEVICE_ID_INTEL_3100_0,
267 .ctl_name = "3100"},
268 };
269
270 /* Valid scrub rates for the e752x/3100 hardware memory scrubber. We
271 * map the scrubbing bandwidth to a hardware register value. The 'set'
272 * operation finds the 'matching or higher value'. Note that scrubbing
273 * on the e752x can only be enabled/disabled. The 3100 supports
274 * a normal and fast mode.
275 */
276
277 #define SDRATE_EOT 0xFFFFFFFF
278
279 struct scrubrate {
280 u32 bandwidth; /* bandwidth consumed by scrubbing in bytes/sec */
281 u16 scrubval; /* register value for scrub rate */
282 };
283
284 /* Rate below assumes same performance as i3100 using PC3200 DDR2 in
285 * normal mode. e752x bridges don't support choosing normal or fast mode,
286 * so the scrubbing bandwidth value isn't all that important - scrubbing is
287 * either on or off.
288 */
289 static const struct scrubrate scrubrates_e752x[] = {
290 {0, 0x00}, /* Scrubbing Off */
291 {500000, 0x02}, /* Scrubbing On */
292 {SDRATE_EOT, 0x00} /* End of Table */
293 };
294
295 /* Fast mode: 2 GByte PC3200 DDR2 scrubbed in 33s = 63161283 bytes/s
296 * Normal mode: 125 (32000 / 256) times slower than fast mode.
297 */
298 static const struct scrubrate scrubrates_i3100[] = {
299 {0, 0x00}, /* Scrubbing Off */
300 {500000, 0x0a}, /* Normal mode - 32k clocks */
301 {62500000, 0x06}, /* Fast mode - 256 clocks */
302 {SDRATE_EOT, 0x00} /* End of Table */
303 };
304
305 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
306 unsigned long page)
307 {
308 u32 remap;
309 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
310
311 edac_dbg(3, "\n");
312
313 if (page < pvt->tolm)
314 return page;
315
316 if ((page >= 0x100000) && (page < pvt->remapbase))
317 return page;
318
319 remap = (page - pvt->tolm) + pvt->remapbase;
320
321 if (remap < pvt->remaplimit)
322 return remap;
323
324 e752x_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
325 return pvt->tolm - 1;
326 }
327
328 static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
329 u32 sec1_add, u16 sec1_syndrome)
330 {
331 u32 page;
332 int row;
333 int channel;
334 int i;
335 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
336
337 edac_dbg(3, "\n");
338
339 /* convert the addr to 4k page */
340 page = sec1_add >> (PAGE_SHIFT - 4);
341
342 /* FIXME - check for -1 */
343 if (pvt->mc_symmetric) {
344 /* chip select are bits 14 & 13 */
345 row = ((page >> 1) & 3);
346 e752x_printk(KERN_WARNING,
347 "Test row %d Table %d %d %d %d %d %d %d %d\n", row,
348 pvt->map[0], pvt->map[1], pvt->map[2], pvt->map[3],
349 pvt->map[4], pvt->map[5], pvt->map[6],
350 pvt->map[7]);
351
352 /* test for channel remapping */
353 for (i = 0; i < 8; i++) {
354 if (pvt->map[i] == row)
355 break;
356 }
357
358 e752x_printk(KERN_WARNING, "Test computed row %d\n", i);
359
360 if (i < 8)
361 row = i;
362 else
363 e752x_mc_printk(mci, KERN_WARNING,
364 "row %d not found in remap table\n",
365 row);
366 } else
367 row = edac_mc_find_csrow_by_page(mci, page);
368
369 /* 0 = channel A, 1 = channel B */
370 channel = !(error_one & 1);
371
372 /* e752x mc reads 34:6 of the DRAM linear address */
373 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
374 page, offset_in_page(sec1_add << 4), sec1_syndrome,
375 row, channel, -1,
376 "e752x CE", "");
377 }
378
379 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
380 u32 sec1_add, u16 sec1_syndrome, int *error_found,
381 int handle_error)
382 {
383 *error_found = 1;
384
385 if (handle_error)
386 do_process_ce(mci, error_one, sec1_add, sec1_syndrome);
387 }
388
389 static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
390 u32 ded_add, u32 scrb_add)
391 {
392 u32 error_2b, block_page;
393 int row;
394 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
395
396 edac_dbg(3, "\n");
397
398 if (error_one & 0x0202) {
399 error_2b = ded_add;
400
401 /* convert to 4k address */
402 block_page = error_2b >> (PAGE_SHIFT - 4);
403
404 row = pvt->mc_symmetric ?
405 /* chip select are bits 14 & 13 */
406 ((block_page >> 1) & 3) :
407 edac_mc_find_csrow_by_page(mci, block_page);
408
409 /* e752x mc reads 34:6 of the DRAM linear address */
410 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
411 block_page,
412 offset_in_page(error_2b << 4), 0,
413 row, -1, -1,
414 "e752x UE from Read", "");
415
416 }
417 if (error_one & 0x0404) {
418 error_2b = scrb_add;
419
420 /* convert to 4k address */
421 block_page = error_2b >> (PAGE_SHIFT - 4);
422
423 row = pvt->mc_symmetric ?
424 /* chip select are bits 14 & 13 */
425 ((block_page >> 1) & 3) :
426 edac_mc_find_csrow_by_page(mci, block_page);
427
428 /* e752x mc reads 34:6 of the DRAM linear address */
429 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
430 block_page,
431 offset_in_page(error_2b << 4), 0,
432 row, -1, -1,
433 "e752x UE from Scruber", "");
434 }
435 }
436
437 static inline void process_ue(struct mem_ctl_info *mci, u16 error_one,
438 u32 ded_add, u32 scrb_add, int *error_found,
439 int handle_error)
440 {
441 *error_found = 1;
442
443 if (handle_error)
444 do_process_ue(mci, error_one, ded_add, scrb_add);
445 }
446
447 static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
448 int *error_found, int handle_error)
449 {
450 *error_found = 1;
451
452 if (!handle_error)
453 return;
454
455 edac_dbg(3, "\n");
456 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
457 -1, -1, -1,
458 "e752x UE log memory write", "");
459 }
460
461 static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
462 u32 retry_add)
463 {
464 u32 error_1b, page;
465 int row;
466 struct e752x_pvt *pvt = (struct e752x_pvt *)mci->pvt_info;
467
468 error_1b = retry_add;
469 page = error_1b >> (PAGE_SHIFT - 4); /* convert the addr to 4k page */
470
471 /* chip select are bits 14 & 13 */
472 row = pvt->mc_symmetric ? ((page >> 1) & 3) :
473 edac_mc_find_csrow_by_page(mci, page);
474
475 e752x_mc_printk(mci, KERN_WARNING,
476 "CE page 0x%lx, row %d : Memory read retry\n",
477 (long unsigned int)page, row);
478 }
479
480 static inline void process_ded_retry(struct mem_ctl_info *mci, u16 error,
481 u32 retry_add, int *error_found,
482 int handle_error)
483 {
484 *error_found = 1;
485
486 if (handle_error)
487 do_process_ded_retry(mci, error, retry_add);
488 }
489
490 static inline void process_threshold_ce(struct mem_ctl_info *mci, u16 error,
491 int *error_found, int handle_error)
492 {
493 *error_found = 1;
494
495 if (handle_error)
496 e752x_mc_printk(mci, KERN_WARNING, "Memory threshold CE\n");
497 }
498
499 static char *global_message[11] = {
500 "PCI Express C1",
501 "PCI Express C",
502 "PCI Express B1",
503 "PCI Express B",
504 "PCI Express A1",
505 "PCI Express A",
506 "DMA Controller",
507 "HUB or NS Interface",
508 "System Bus",
509 "DRAM Controller", /* 9th entry */
510 "Internal Buffer"
511 };
512
513 #define DRAM_ENTRY 9
514
515 static char *fatal_message[2] = { "Non-Fatal ", "Fatal " };
516
517 static void do_global_error(int fatal, u32 errors)
518 {
519 int i;
520
521 for (i = 0; i < 11; i++) {
522 if (errors & (1 << i)) {
523 /* If the error is from DRAM Controller OR
524 * we are to report ALL errors, then
525 * report the error
526 */
527 if ((i == DRAM_ENTRY) || report_non_memory_errors)
528 e752x_printk(KERN_WARNING, "%sError %s\n",
529 fatal_message[fatal],
530 global_message[i]);
531 }
532 }
533 }
534
535 static inline void global_error(int fatal, u32 errors, int *error_found,
536 int handle_error)
537 {
538 *error_found = 1;
539
540 if (handle_error)
541 do_global_error(fatal, errors);
542 }
543
544 static char *hub_message[7] = {
545 "HI Address or Command Parity", "HI Illegal Access",
546 "HI Internal Parity", "Out of Range Access",
547 "HI Data Parity", "Enhanced Config Access",
548 "Hub Interface Target Abort"
549 };
550
551 static void do_hub_error(int fatal, u8 errors)
552 {
553 int i;
554
555 for (i = 0; i < 7; i++) {
556 if (errors & (1 << i))
557 e752x_printk(KERN_WARNING, "%sError %s\n",
558 fatal_message[fatal], hub_message[i]);
559 }
560 }
561
562 static inline void hub_error(int fatal, u8 errors, int *error_found,
563 int handle_error)
564 {
565 *error_found = 1;
566
567 if (handle_error)
568 do_hub_error(fatal, errors);
569 }
570
571 #define NSI_FATAL_MASK 0x0c080081
572 #define NSI_NON_FATAL_MASK 0x23a0ba64
573 #define NSI_ERR_MASK (NSI_FATAL_MASK | NSI_NON_FATAL_MASK)
574
575 static char *nsi_message[30] = {
576 "NSI Link Down", /* NSI_FERR/NSI_NERR bit 0, fatal error */
577 "", /* reserved */
578 "NSI Parity Error", /* bit 2, non-fatal */
579 "", /* reserved */
580 "", /* reserved */
581 "Correctable Error Message", /* bit 5, non-fatal */
582 "Non-Fatal Error Message", /* bit 6, non-fatal */
583 "Fatal Error Message", /* bit 7, fatal */
584 "", /* reserved */
585 "Receiver Error", /* bit 9, non-fatal */
586 "", /* reserved */
587 "Bad TLP", /* bit 11, non-fatal */
588 "Bad DLLP", /* bit 12, non-fatal */
589 "REPLAY_NUM Rollover", /* bit 13, non-fatal */
590 "", /* reserved */
591 "Replay Timer Timeout", /* bit 15, non-fatal */
592 "", /* reserved */
593 "", /* reserved */
594 "", /* reserved */
595 "Data Link Protocol Error", /* bit 19, fatal */
596 "", /* reserved */
597 "Poisoned TLP", /* bit 21, non-fatal */
598 "", /* reserved */
599 "Completion Timeout", /* bit 23, non-fatal */
600 "Completer Abort", /* bit 24, non-fatal */
601 "Unexpected Completion", /* bit 25, non-fatal */
602 "Receiver Overflow", /* bit 26, fatal */
603 "Malformed TLP", /* bit 27, fatal */
604 "", /* reserved */
605 "Unsupported Request" /* bit 29, non-fatal */
606 };
607
608 static void do_nsi_error(int fatal, u32 errors)
609 {
610 int i;
611
612 for (i = 0; i < 30; i++) {
613 if (errors & (1 << i))
614 printk(KERN_WARNING "%sError %s\n",
615 fatal_message[fatal], nsi_message[i]);
616 }
617 }
618
619 static inline void nsi_error(int fatal, u32 errors, int *error_found,
620 int handle_error)
621 {
622 *error_found = 1;
623
624 if (handle_error)
625 do_nsi_error(fatal, errors);
626 }
627
628 static char *membuf_message[4] = {
629 "Internal PMWB to DRAM parity",
630 "Internal PMWB to System Bus Parity",
631 "Internal System Bus or IO to PMWB Parity",
632 "Internal DRAM to PMWB Parity"
633 };
634
635 static void do_membuf_error(u8 errors)
636 {
637 int i;
638
639 for (i = 0; i < 4; i++) {
640 if (errors & (1 << i))
641 e752x_printk(KERN_WARNING, "Non-Fatal Error %s\n",
642 membuf_message[i]);
643 }
644 }
645
646 static inline void membuf_error(u8 errors, int *error_found, int handle_error)
647 {
648 *error_found = 1;
649
650 if (handle_error)
651 do_membuf_error(errors);
652 }
653
654 static char *sysbus_message[10] = {
655 "Addr or Request Parity",
656 "Data Strobe Glitch",
657 "Addr Strobe Glitch",
658 "Data Parity",
659 "Addr Above TOM",
660 "Non DRAM Lock Error",
661 "MCERR", "BINIT",
662 "Memory Parity",
663 "IO Subsystem Parity"
664 };
665
666 static void do_sysbus_error(int fatal, u32 errors)
667 {
668 int i;
669
670 for (i = 0; i < 10; i++) {
671 if (errors & (1 << i))
672 e752x_printk(KERN_WARNING, "%sError System Bus %s\n",
673 fatal_message[fatal], sysbus_message[i]);
674 }
675 }
676
677 static inline void sysbus_error(int fatal, u32 errors, int *error_found,
678 int handle_error)
679 {
680 *error_found = 1;
681
682 if (handle_error)
683 do_sysbus_error(fatal, errors);
684 }
685
686 static void e752x_check_hub_interface(struct e752x_error_info *info,
687 int *error_found, int handle_error)
688 {
689 u8 stat8;
690
691 //pci_read_config_byte(dev,E752X_HI_FERR,&stat8);
692
693 stat8 = info->hi_ferr;
694
695 if (stat8 & 0x7f) { /* Error, so process */
696 stat8 &= 0x7f;
697
698 if (stat8 & 0x2b)
699 hub_error(1, stat8 & 0x2b, error_found, handle_error);
700
701 if (stat8 & 0x54)
702 hub_error(0, stat8 & 0x54, error_found, handle_error);
703 }
704 //pci_read_config_byte(dev,E752X_HI_NERR,&stat8);
705
706 stat8 = info->hi_nerr;
707
708 if (stat8 & 0x7f) { /* Error, so process */
709 stat8 &= 0x7f;
710
711 if (stat8 & 0x2b)
712 hub_error(1, stat8 & 0x2b, error_found, handle_error);
713
714 if (stat8 & 0x54)
715 hub_error(0, stat8 & 0x54, error_found, handle_error);
716 }
717 }
718
719 static void e752x_check_ns_interface(struct e752x_error_info *info,
720 int *error_found, int handle_error)
721 {
722 u32 stat32;
723
724 stat32 = info->nsi_ferr;
725 if (stat32 & NSI_ERR_MASK) { /* Error, so process */
726 if (stat32 & NSI_FATAL_MASK) /* check for fatal errors */
727 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
728 handle_error);
729 if (stat32 & NSI_NON_FATAL_MASK) /* check for non-fatal ones */
730 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
731 handle_error);
732 }
733 stat32 = info->nsi_nerr;
734 if (stat32 & NSI_ERR_MASK) {
735 if (stat32 & NSI_FATAL_MASK)
736 nsi_error(1, stat32 & NSI_FATAL_MASK, error_found,
737 handle_error);
738 if (stat32 & NSI_NON_FATAL_MASK)
739 nsi_error(0, stat32 & NSI_NON_FATAL_MASK, error_found,
740 handle_error);
741 }
742 }
743
744 static void e752x_check_sysbus(struct e752x_error_info *info,
745 int *error_found, int handle_error)
746 {
747 u32 stat32, error32;
748
749 //pci_read_config_dword(dev,E752X_SYSBUS_FERR,&stat32);
750 stat32 = info->sysbus_ferr + (info->sysbus_nerr << 16);
751
752 if (stat32 == 0)
753 return; /* no errors */
754
755 error32 = (stat32 >> 16) & 0x3ff;
756 stat32 = stat32 & 0x3ff;
757
758 if (stat32 & 0x087)
759 sysbus_error(1, stat32 & 0x087, error_found, handle_error);
760
761 if (stat32 & 0x378)
762 sysbus_error(0, stat32 & 0x378, error_found, handle_error);
763
764 if (error32 & 0x087)
765 sysbus_error(1, error32 & 0x087, error_found, handle_error);
766
767 if (error32 & 0x378)
768 sysbus_error(0, error32 & 0x378, error_found, handle_error);
769 }
770
771 static void e752x_check_membuf(struct e752x_error_info *info,
772 int *error_found, int handle_error)
773 {
774 u8 stat8;
775
776 stat8 = info->buf_ferr;
777
778 if (stat8 & 0x0f) { /* Error, so process */
779 stat8 &= 0x0f;
780 membuf_error(stat8, error_found, handle_error);
781 }
782
783 stat8 = info->buf_nerr;
784
785 if (stat8 & 0x0f) { /* Error, so process */
786 stat8 &= 0x0f;
787 membuf_error(stat8, error_found, handle_error);
788 }
789 }
790
791 static void e752x_check_dram(struct mem_ctl_info *mci,
792 struct e752x_error_info *info, int *error_found,
793 int handle_error)
794 {
795 u16 error_one, error_next;
796
797 error_one = info->dram_ferr;
798 error_next = info->dram_nerr;
799
800 /* decode and report errors */
801 if (error_one & 0x0101) /* check first error correctable */
802 process_ce(mci, error_one, info->dram_sec1_add,
803 info->dram_sec1_syndrome, error_found, handle_error);
804
805 if (error_next & 0x0101) /* check next error correctable */
806 process_ce(mci, error_next, info->dram_sec2_add,
807 info->dram_sec2_syndrome, error_found, handle_error);
808
809 if (error_one & 0x4040)
810 process_ue_no_info_wr(mci, error_found, handle_error);
811
812 if (error_next & 0x4040)
813 process_ue_no_info_wr(mci, error_found, handle_error);
814
815 if (error_one & 0x2020)
816 process_ded_retry(mci, error_one, info->dram_retr_add,
817 error_found, handle_error);
818
819 if (error_next & 0x2020)
820 process_ded_retry(mci, error_next, info->dram_retr_add,
821 error_found, handle_error);
822
823 if (error_one & 0x0808)
824 process_threshold_ce(mci, error_one, error_found, handle_error);
825
826 if (error_next & 0x0808)
827 process_threshold_ce(mci, error_next, error_found,
828 handle_error);
829
830 if (error_one & 0x0606)
831 process_ue(mci, error_one, info->dram_ded_add,
832 info->dram_scrb_add, error_found, handle_error);
833
834 if (error_next & 0x0606)
835 process_ue(mci, error_next, info->dram_ded_add,
836 info->dram_scrb_add, error_found, handle_error);
837 }
838
839 static void e752x_get_error_info(struct mem_ctl_info *mci,
840 struct e752x_error_info *info)
841 {
842 struct pci_dev *dev;
843 struct e752x_pvt *pvt;
844
845 memset(info, 0, sizeof(*info));
846 pvt = (struct e752x_pvt *)mci->pvt_info;
847 dev = pvt->dev_d0f1;
848 pci_read_config_dword(dev, E752X_FERR_GLOBAL, &info->ferr_global);
849
850 if (info->ferr_global) {
851 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
852 pci_read_config_dword(dev, I3100_NSI_FERR,
853 &info->nsi_ferr);
854 info->hi_ferr = 0;
855 } else {
856 pci_read_config_byte(dev, E752X_HI_FERR,
857 &info->hi_ferr);
858 info->nsi_ferr = 0;
859 }
860 pci_read_config_word(dev, E752X_SYSBUS_FERR,
861 &info->sysbus_ferr);
862 pci_read_config_byte(dev, E752X_BUF_FERR, &info->buf_ferr);
863 pci_read_config_word(dev, E752X_DRAM_FERR, &info->dram_ferr);
864 pci_read_config_dword(dev, E752X_DRAM_SEC1_ADD,
865 &info->dram_sec1_add);
866 pci_read_config_word(dev, E752X_DRAM_SEC1_SYNDROME,
867 &info->dram_sec1_syndrome);
868 pci_read_config_dword(dev, E752X_DRAM_DED_ADD,
869 &info->dram_ded_add);
870 pci_read_config_dword(dev, E752X_DRAM_SCRB_ADD,
871 &info->dram_scrb_add);
872 pci_read_config_dword(dev, E752X_DRAM_RETR_ADD,
873 &info->dram_retr_add);
874
875 /* ignore the reserved bits just in case */
876 if (info->hi_ferr & 0x7f)
877 pci_write_config_byte(dev, E752X_HI_FERR,
878 info->hi_ferr);
879
880 if (info->nsi_ferr & NSI_ERR_MASK)
881 pci_write_config_dword(dev, I3100_NSI_FERR,
882 info->nsi_ferr);
883
884 if (info->sysbus_ferr)
885 pci_write_config_word(dev, E752X_SYSBUS_FERR,
886 info->sysbus_ferr);
887
888 if (info->buf_ferr & 0x0f)
889 pci_write_config_byte(dev, E752X_BUF_FERR,
890 info->buf_ferr);
891
892 if (info->dram_ferr)
893 pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_FERR,
894 info->dram_ferr, info->dram_ferr);
895
896 pci_write_config_dword(dev, E752X_FERR_GLOBAL,
897 info->ferr_global);
898 }
899
900 pci_read_config_dword(dev, E752X_NERR_GLOBAL, &info->nerr_global);
901
902 if (info->nerr_global) {
903 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
904 pci_read_config_dword(dev, I3100_NSI_NERR,
905 &info->nsi_nerr);
906 info->hi_nerr = 0;
907 } else {
908 pci_read_config_byte(dev, E752X_HI_NERR,
909 &info->hi_nerr);
910 info->nsi_nerr = 0;
911 }
912 pci_read_config_word(dev, E752X_SYSBUS_NERR,
913 &info->sysbus_nerr);
914 pci_read_config_byte(dev, E752X_BUF_NERR, &info->buf_nerr);
915 pci_read_config_word(dev, E752X_DRAM_NERR, &info->dram_nerr);
916 pci_read_config_dword(dev, E752X_DRAM_SEC2_ADD,
917 &info->dram_sec2_add);
918 pci_read_config_word(dev, E752X_DRAM_SEC2_SYNDROME,
919 &info->dram_sec2_syndrome);
920
921 if (info->hi_nerr & 0x7f)
922 pci_write_config_byte(dev, E752X_HI_NERR,
923 info->hi_nerr);
924
925 if (info->nsi_nerr & NSI_ERR_MASK)
926 pci_write_config_dword(dev, I3100_NSI_NERR,
927 info->nsi_nerr);
928
929 if (info->sysbus_nerr)
930 pci_write_config_word(dev, E752X_SYSBUS_NERR,
931 info->sysbus_nerr);
932
933 if (info->buf_nerr & 0x0f)
934 pci_write_config_byte(dev, E752X_BUF_NERR,
935 info->buf_nerr);
936
937 if (info->dram_nerr)
938 pci_write_bits16(pvt->dev_d0f1, E752X_DRAM_NERR,
939 info->dram_nerr, info->dram_nerr);
940
941 pci_write_config_dword(dev, E752X_NERR_GLOBAL,
942 info->nerr_global);
943 }
944 }
945
946 static int e752x_process_error_info(struct mem_ctl_info *mci,
947 struct e752x_error_info *info,
948 int handle_errors)
949 {
950 u32 error32, stat32;
951 int error_found;
952
953 error_found = 0;
954 error32 = (info->ferr_global >> 18) & 0x3ff;
955 stat32 = (info->ferr_global >> 4) & 0x7ff;
956
957 if (error32)
958 global_error(1, error32, &error_found, handle_errors);
959
960 if (stat32)
961 global_error(0, stat32, &error_found, handle_errors);
962
963 error32 = (info->nerr_global >> 18) & 0x3ff;
964 stat32 = (info->nerr_global >> 4) & 0x7ff;
965
966 if (error32)
967 global_error(1, error32, &error_found, handle_errors);
968
969 if (stat32)
970 global_error(0, stat32, &error_found, handle_errors);
971
972 e752x_check_hub_interface(info, &error_found, handle_errors);
973 e752x_check_ns_interface(info, &error_found, handle_errors);
974 e752x_check_sysbus(info, &error_found, handle_errors);
975 e752x_check_membuf(info, &error_found, handle_errors);
976 e752x_check_dram(mci, info, &error_found, handle_errors);
977 return error_found;
978 }
979
980 static void e752x_check(struct mem_ctl_info *mci)
981 {
982 struct e752x_error_info info;
983
984 edac_dbg(3, "\n");
985 e752x_get_error_info(mci, &info);
986 e752x_process_error_info(mci, &info, 1);
987 }
988
989 /* Program byte/sec bandwidth scrub rate to hardware */
990 static int set_sdram_scrub_rate(struct mem_ctl_info *mci, u32 new_bw)
991 {
992 const struct scrubrate *scrubrates;
993 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
994 struct pci_dev *pdev = pvt->dev_d0f0;
995 int i;
996
997 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
998 scrubrates = scrubrates_i3100;
999 else
1000 scrubrates = scrubrates_e752x;
1001
1002 /* Translate the desired scrub rate to a e752x/3100 register value.
1003 * Search for the bandwidth that is equal or greater than the
1004 * desired rate and program the cooresponding register value.
1005 */
1006 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1007 if (scrubrates[i].bandwidth >= new_bw)
1008 break;
1009
1010 if (scrubrates[i].bandwidth == SDRATE_EOT)
1011 return -1;
1012
1013 pci_write_config_word(pdev, E752X_MCHSCRB, scrubrates[i].scrubval);
1014
1015 return scrubrates[i].bandwidth;
1016 }
1017
1018 /* Convert current scrub rate value into byte/sec bandwidth */
1019 static int get_sdram_scrub_rate(struct mem_ctl_info *mci)
1020 {
1021 const struct scrubrate *scrubrates;
1022 struct e752x_pvt *pvt = (struct e752x_pvt *) mci->pvt_info;
1023 struct pci_dev *pdev = pvt->dev_d0f0;
1024 u16 scrubval;
1025 int i;
1026
1027 if (pvt->dev_info->ctl_dev == PCI_DEVICE_ID_INTEL_3100_0)
1028 scrubrates = scrubrates_i3100;
1029 else
1030 scrubrates = scrubrates_e752x;
1031
1032 /* Find the bandwidth matching the memory scrubber configuration */
1033 pci_read_config_word(pdev, E752X_MCHSCRB, &scrubval);
1034 scrubval = scrubval & 0x0f;
1035
1036 for (i = 0; scrubrates[i].bandwidth != SDRATE_EOT; i++)
1037 if (scrubrates[i].scrubval == scrubval)
1038 break;
1039
1040 if (scrubrates[i].bandwidth == SDRATE_EOT) {
1041 e752x_printk(KERN_WARNING,
1042 "Invalid sdram scrub control value: 0x%x\n", scrubval);
1043 return -1;
1044 }
1045 return scrubrates[i].bandwidth;
1046
1047 }
1048
1049 /* Return 1 if dual channel mode is active. Else return 0. */
1050 static inline int dual_channel_active(u16 ddrcsr)
1051 {
1052 return (((ddrcsr >> 12) & 3) == 3);
1053 }
1054
1055 /* Remap csrow index numbers if map_type is "reverse"
1056 */
1057 static inline int remap_csrow_index(struct mem_ctl_info *mci, int index)
1058 {
1059 struct e752x_pvt *pvt = mci->pvt_info;
1060
1061 if (!pvt->map_type)
1062 return (7 - index);
1063
1064 return (index);
1065 }
1066
1067 static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
1068 u16 ddrcsr)
1069 {
1070 struct csrow_info *csrow;
1071 enum edac_type edac_mode;
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 edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
1105 if (cumul_size == last_cumul_size)
1106 continue; /* not populated */
1107
1108 csrow->first_page = last_cumul_size;
1109 csrow->last_page = cumul_size - 1;
1110 nr_pages = cumul_size - last_cumul_size;
1111 last_cumul_size = cumul_size;
1112
1113 /*
1114 * if single channel or x8 devices then SECDED
1115 * if dual channel and x4 then S4ECD4ED
1116 */
1117 if (drc_ddim) {
1118 if (drc_chan && mem_dev) {
1119 edac_mode = EDAC_S4ECD4ED;
1120 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
1121 } else {
1122 edac_mode = EDAC_SECDED;
1123 mci->edac_cap |= EDAC_FLAG_SECDED;
1124 }
1125 } else
1126 edac_mode = EDAC_NONE;
1127 for (i = 0; i < csrow->nr_channels; i++) {
1128 struct dimm_info *dimm = csrow->channels[i]->dimm;
1129
1130 edac_dbg(3, "Initializing rank at (%i,%i)\n", index, i);
1131 dimm->nr_pages = nr_pages / csrow->nr_channels;
1132 dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
1133 dimm->mtype = MEM_RDDR; /* only one type supported */
1134 dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
1135 dimm->edac_mode = edac_mode;
1136 }
1137 }
1138 }
1139
1140 static void e752x_init_mem_map_table(struct pci_dev *pdev,
1141 struct e752x_pvt *pvt)
1142 {
1143 int index;
1144 u8 value, last, row;
1145
1146 last = 0;
1147 row = 0;
1148
1149 for (index = 0; index < 8; index += 2) {
1150 pci_read_config_byte(pdev, E752X_DRB + index, &value);
1151 /* test if there is a dimm in this slot */
1152 if (value == last) {
1153 /* no dimm in the slot, so flag it as empty */
1154 pvt->map[index] = 0xff;
1155 pvt->map[index + 1] = 0xff;
1156 } else { /* there is a dimm in the slot */
1157 pvt->map[index] = row;
1158 row++;
1159 last = value;
1160 /* test the next value to see if the dimm is double
1161 * sided
1162 */
1163 pci_read_config_byte(pdev, E752X_DRB + index + 1,
1164 &value);
1165
1166 /* the dimm is single sided, so flag as empty */
1167 /* this is a double sided dimm to save the next row #*/
1168 pvt->map[index + 1] = (value == last) ? 0xff : row;
1169 row++;
1170 last = value;
1171 }
1172 }
1173 }
1174
1175 /* Return 0 on success or 1 on failure. */
1176 static int e752x_get_devs(struct pci_dev *pdev, int dev_idx,
1177 struct e752x_pvt *pvt)
1178 {
1179 pvt->dev_d0f1 = pci_get_device(PCI_VENDOR_ID_INTEL,
1180 pvt->dev_info->err_dev, NULL);
1181
1182 if (pvt->dev_d0f1 == NULL) {
1183 pvt->dev_d0f1 = pci_scan_single_device(pdev->bus,
1184 PCI_DEVFN(0, 1));
1185 pci_dev_get(pvt->dev_d0f1);
1186 }
1187
1188 if (pvt->dev_d0f1 == NULL) {
1189 e752x_printk(KERN_ERR, "error reporting device not found:"
1190 "vendor %x device 0x%x (broken BIOS?)\n",
1191 PCI_VENDOR_ID_INTEL, e752x_devs[dev_idx].err_dev);
1192 return 1;
1193 }
1194
1195 pvt->dev_d0f0 = pci_get_device(PCI_VENDOR_ID_INTEL,
1196 e752x_devs[dev_idx].ctl_dev,
1197 NULL);
1198
1199 if (pvt->dev_d0f0 == NULL)
1200 goto fail;
1201
1202 return 0;
1203
1204 fail:
1205 pci_dev_put(pvt->dev_d0f1);
1206 return 1;
1207 }
1208
1209 /* Setup system bus parity mask register.
1210 * Sysbus parity supported on:
1211 * e7320/e7520/e7525 + Xeon
1212 */
1213 static void e752x_init_sysbus_parity_mask(struct e752x_pvt *pvt)
1214 {
1215 char *cpu_id = cpu_data(0).x86_model_id;
1216 struct pci_dev *dev = pvt->dev_d0f1;
1217 int enable = 1;
1218
1219 /* Allow module parameter override, else see if CPU supports parity */
1220 if (sysbus_parity != -1) {
1221 enable = sysbus_parity;
1222 } else if (cpu_id[0] && !strstr(cpu_id, "Xeon")) {
1223 e752x_printk(KERN_INFO, "System Bus Parity not "
1224 "supported by CPU, disabling\n");
1225 enable = 0;
1226 }
1227
1228 if (enable)
1229 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0000);
1230 else
1231 pci_write_config_word(dev, E752X_SYSBUS_ERRMASK, 0x0309);
1232 }
1233
1234 static void e752x_init_error_reporting_regs(struct e752x_pvt *pvt)
1235 {
1236 struct pci_dev *dev;
1237
1238 dev = pvt->dev_d0f1;
1239 /* Turn off error disable & SMI in case the BIOS turned it on */
1240 if (pvt->dev_info->err_dev == PCI_DEVICE_ID_INTEL_3100_1_ERR) {
1241 pci_write_config_dword(dev, I3100_NSI_EMASK, 0);
1242 pci_write_config_dword(dev, I3100_NSI_SMICMD, 0);
1243 } else {
1244 pci_write_config_byte(dev, E752X_HI_ERRMASK, 0x00);
1245 pci_write_config_byte(dev, E752X_HI_SMICMD, 0x00);
1246 }
1247
1248 e752x_init_sysbus_parity_mask(pvt);
1249
1250 pci_write_config_word(dev, E752X_SYSBUS_SMICMD, 0x00);
1251 pci_write_config_byte(dev, E752X_BUF_ERRMASK, 0x00);
1252 pci_write_config_byte(dev, E752X_BUF_SMICMD, 0x00);
1253 pci_write_config_byte(dev, E752X_DRAM_ERRMASK, 0x00);
1254 pci_write_config_byte(dev, E752X_DRAM_SMICMD, 0x00);
1255 }
1256
1257 static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
1258 {
1259 u16 pci_data;
1260 u8 stat8;
1261 struct mem_ctl_info *mci;
1262 struct edac_mc_layer layers[2];
1263 struct e752x_pvt *pvt;
1264 u16 ddrcsr;
1265 int drc_chan; /* Number of channels 0=1chan,1=2chan */
1266 struct e752x_error_info discard;
1267
1268 edac_dbg(0, "mci\n");
1269 edac_dbg(0, "Starting Probe1\n");
1270
1271 /* check to see if device 0 function 1 is enabled; if it isn't, we
1272 * assume the BIOS has reserved it for a reason and is expecting
1273 * exclusive access, we take care not to violate that assumption and
1274 * fail the probe. */
1275 pci_read_config_byte(pdev, E752X_DEVPRES1, &stat8);
1276 if (!force_function_unhide && !(stat8 & (1 << 5))) {
1277 printk(KERN_INFO "Contact your BIOS vendor to see if the "
1278 "E752x error registers can be safely un-hidden\n");
1279 return -ENODEV;
1280 }
1281 stat8 |= (1 << 5);
1282 pci_write_config_byte(pdev, E752X_DEVPRES1, stat8);
1283
1284 pci_read_config_word(pdev, E752X_DDRCSR, &ddrcsr);
1285 /* FIXME: should check >>12 or 0xf, true for all? */
1286 /* Dual channel = 1, Single channel = 0 */
1287 drc_chan = dual_channel_active(ddrcsr);
1288
1289 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
1290 layers[0].size = E752X_NR_CSROWS;
1291 layers[0].is_virt_csrow = true;
1292 layers[1].type = EDAC_MC_LAYER_CHANNEL;
1293 layers[1].size = drc_chan + 1;
1294 layers[1].is_virt_csrow = false;
1295 mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
1296 if (mci == NULL)
1297 return -ENOMEM;
1298
1299 edac_dbg(3, "init mci\n");
1300 mci->mtype_cap = MEM_FLAG_RDDR;
1301 /* 3100 IMCH supports SECDEC only */
1302 mci->edac_ctl_cap = (dev_idx == I3100) ? EDAC_FLAG_SECDED :
1303 (EDAC_FLAG_NONE | EDAC_FLAG_SECDED | EDAC_FLAG_S4ECD4ED);
1304 /* FIXME - what if different memory types are in different csrows? */
1305 mci->mod_name = EDAC_MOD_STR;
1306 mci->mod_ver = E752X_REVISION;
1307 mci->pdev = &pdev->dev;
1308
1309 edac_dbg(3, "init pvt\n");
1310 pvt = (struct e752x_pvt *)mci->pvt_info;
1311 pvt->dev_info = &e752x_devs[dev_idx];
1312 pvt->mc_symmetric = ((ddrcsr & 0x10) != 0);
1313
1314 if (e752x_get_devs(pdev, dev_idx, pvt)) {
1315 edac_mc_free(mci);
1316 return -ENODEV;
1317 }
1318
1319 edac_dbg(3, "more mci init\n");
1320 mci->ctl_name = pvt->dev_info->ctl_name;
1321 mci->dev_name = pci_name(pdev);
1322 mci->edac_check = e752x_check;
1323 mci->ctl_page_to_phys = ctl_page_to_phys;
1324 mci->set_sdram_scrub_rate = set_sdram_scrub_rate;
1325 mci->get_sdram_scrub_rate = get_sdram_scrub_rate;
1326
1327 /* set the map type. 1 = normal, 0 = reversed
1328 * Must be set before e752x_init_csrows in case csrow mapping
1329 * is reversed.
1330 */
1331 pci_read_config_byte(pdev, E752X_DRM, &stat8);
1332 pvt->map_type = ((stat8 & 0x0f) > ((stat8 >> 4) & 0x0f));
1333
1334 e752x_init_csrows(mci, pdev, ddrcsr);
1335 e752x_init_mem_map_table(pdev, pvt);
1336
1337 if (dev_idx == I3100)
1338 mci->edac_cap = EDAC_FLAG_SECDED; /* the only mode supported */
1339 else
1340 mci->edac_cap |= EDAC_FLAG_NONE;
1341 edac_dbg(3, "tolm, remapbase, remaplimit\n");
1342
1343 /* load the top of low memory, remap base, and remap limit vars */
1344 pci_read_config_word(pdev, E752X_TOLM, &pci_data);
1345 pvt->tolm = ((u32) pci_data) << 4;
1346 pci_read_config_word(pdev, E752X_REMAPBASE, &pci_data);
1347 pvt->remapbase = ((u32) pci_data) << 14;
1348 pci_read_config_word(pdev, E752X_REMAPLIMIT, &pci_data);
1349 pvt->remaplimit = ((u32) pci_data) << 14;
1350 e752x_printk(KERN_INFO,
1351 "tolm = %x, remapbase = %x, remaplimit = %x\n",
1352 pvt->tolm, pvt->remapbase, pvt->remaplimit);
1353
1354 /* Here we assume that we will never see multiple instances of this
1355 * type of memory controller. The ID is therefore hardcoded to 0.
1356 */
1357 if (edac_mc_add_mc(mci)) {
1358 edac_dbg(3, "failed edac_mc_add_mc()\n");
1359 goto fail;
1360 }
1361
1362 e752x_init_error_reporting_regs(pvt);
1363 e752x_get_error_info(mci, &discard); /* clear other MCH errors */
1364
1365 /* allocating generic PCI control info */
1366 e752x_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
1367 if (!e752x_pci) {
1368 printk(KERN_WARNING
1369 "%s(): Unable to create PCI control\n", __func__);
1370 printk(KERN_WARNING
1371 "%s(): PCI error report via EDAC not setup\n",
1372 __func__);
1373 }
1374
1375 /* get this far and it's successful */
1376 edac_dbg(3, "success\n");
1377 return 0;
1378
1379 fail:
1380 pci_dev_put(pvt->dev_d0f0);
1381 pci_dev_put(pvt->dev_d0f1);
1382 edac_mc_free(mci);
1383
1384 return -ENODEV;
1385 }
1386
1387 /* returns count (>= 0), or negative on error */
1388 static int e752x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1389 {
1390 edac_dbg(0, "\n");
1391
1392 /* wake up and enable device */
1393 if (pci_enable_device(pdev) < 0)
1394 return -EIO;
1395
1396 return e752x_probe1(pdev, ent->driver_data);
1397 }
1398
1399 static void e752x_remove_one(struct pci_dev *pdev)
1400 {
1401 struct mem_ctl_info *mci;
1402 struct e752x_pvt *pvt;
1403
1404 edac_dbg(0, "\n");
1405
1406 if (e752x_pci)
1407 edac_pci_release_generic_ctl(e752x_pci);
1408
1409 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
1410 return;
1411
1412 pvt = (struct e752x_pvt *)mci->pvt_info;
1413 pci_dev_put(pvt->dev_d0f0);
1414 pci_dev_put(pvt->dev_d0f1);
1415 edac_mc_free(mci);
1416 }
1417
1418 static const struct pci_device_id e752x_pci_tbl[] = {
1419 {
1420 PCI_VEND_DEV(INTEL, 7520_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1421 E7520},
1422 {
1423 PCI_VEND_DEV(INTEL, 7525_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1424 E7525},
1425 {
1426 PCI_VEND_DEV(INTEL, 7320_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1427 E7320},
1428 {
1429 PCI_VEND_DEV(INTEL, 3100_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1430 I3100},
1431 {
1432 0,
1433 } /* 0 terminated list. */
1434 };
1435
1436 MODULE_DEVICE_TABLE(pci, e752x_pci_tbl);
1437
1438 static struct pci_driver e752x_driver = {
1439 .name = EDAC_MOD_STR,
1440 .probe = e752x_init_one,
1441 .remove = e752x_remove_one,
1442 .id_table = e752x_pci_tbl,
1443 };
1444
1445 static int __init e752x_init(void)
1446 {
1447 int pci_rc;
1448
1449 edac_dbg(3, "\n");
1450
1451 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
1452 opstate_init();
1453
1454 pci_rc = pci_register_driver(&e752x_driver);
1455 return (pci_rc < 0) ? pci_rc : 0;
1456 }
1457
1458 static void __exit e752x_exit(void)
1459 {
1460 edac_dbg(3, "\n");
1461 pci_unregister_driver(&e752x_driver);
1462 }
1463
1464 module_init(e752x_init);
1465 module_exit(e752x_exit);
1466
1467 MODULE_LICENSE("GPL");
1468 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Tom Zimmerman\n");
1469 MODULE_DESCRIPTION("MC support for Intel e752x/3100 memory controllers");
1470
1471 module_param(force_function_unhide, int, 0444);
1472 MODULE_PARM_DESC(force_function_unhide, "if BIOS sets Dev0:Fun1 up as hidden:"
1473 " 1=force unhide and hope BIOS doesn't fight driver for "
1474 "Dev0:Fun1 access");
1475
1476 module_param(edac_op_state, int, 0444);
1477 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
1478
1479 module_param(sysbus_parity, int, 0444);
1480 MODULE_PARM_DESC(sysbus_parity, "0=disable system bus parity checking,"
1481 " 1=enable system bus parity checking, default=auto-detect");
1482 module_param(report_non_memory_errors, int, 0644);
1483 MODULE_PARM_DESC(report_non_memory_errors, "0=disable non-memory error "
1484 "reporting, 1=enable non-memory error reporting");
Linux with added FPC-III support