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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / edac / i5400_edac.c
blob74d6ec342afbf2e0f34c9d8fe808f3c8b0f6d9c5
1 /*
2 * Intel 5400 class Memory Controllers kernel module (Seaburg)
3 *
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
6 *
7 * Copyright (c) 2008 by:
8 * Ben Woodard <woodard@redhat.com>
9 * Mauro Carvalho Chehab <mchehab@redhat.com>
10 *
11 * Red Hat Inc. http://www.redhat.com
12 *
13 * Forked and adapted from the i5000_edac driver which was
14 * written by Douglas Thompson Linux Networx <norsk5@xmission.com>
15 *
16 * This module is based on the following document:
17 *
18 * Intel 5400 Chipset Memory Controller Hub (MCH) - Datasheet
19 * http://developer.intel.com/design/chipsets/datashts/313070.htm
20 *
21 */
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/pci_ids.h>
27 #include <linux/slab.h>
28 #include <linux/edac.h>
29 #include <linux/mmzone.h>
30
31 #include "edac_core.h"
32
33 /*
34 * Alter this version for the I5400 module when modifications are made
35 */
36 #define I5400_REVISION " Ver: 1.0.0"
37
38 #define EDAC_MOD_STR "i5400_edac"
39
40 #define i5400_printk(level, fmt, arg...) \
41 edac_printk(level, "i5400", fmt, ##arg)
42
43 #define i5400_mc_printk(mci, level, fmt, arg...) \
44 edac_mc_chipset_printk(mci, level, "i5400", fmt, ##arg)
45
46 /* Limits for i5400 */
47 #define NUM_MTRS_PER_BRANCH 4
48 #define CHANNELS_PER_BRANCH 2
49 #define MAX_DIMMS_PER_CHANNEL NUM_MTRS_PER_BRANCH
50 #define MAX_CHANNELS 4
51 /* max possible csrows per channel */
52 #define MAX_CSROWS (MAX_DIMMS_PER_CHANNEL)
53
54 /* Device 16,
55 * Function 0: System Address
56 * Function 1: Memory Branch Map, Control, Errors Register
57 * Function 2: FSB Error Registers
58 *
59 * All 3 functions of Device 16 (0,1,2) share the SAME DID and
60 * uses PCI_DEVICE_ID_INTEL_5400_ERR for device 16 (0,1,2),
61 * PCI_DEVICE_ID_INTEL_5400_FBD0 and PCI_DEVICE_ID_INTEL_5400_FBD1
62 * for device 21 (0,1).
63 */
64
65 /* OFFSETS for Function 0 */
66 #define AMBASE 0x48 /* AMB Mem Mapped Reg Region Base */
67 #define MAXCH 0x56 /* Max Channel Number */
68 #define MAXDIMMPERCH 0x57 /* Max DIMM PER Channel Number */
69
70 /* OFFSETS for Function 1 */
71 #define TOLM 0x6C
72 #define REDMEMB 0x7C
73 #define REC_ECC_LOCATOR_ODD(x) ((x) & 0x3fe00) /* bits [17:9] indicate ODD, [8:0] indicate EVEN */
74 #define MIR0 0x80
75 #define MIR1 0x84
76 #define AMIR0 0x8c
77 #define AMIR1 0x90
78
79 /* Fatal error registers */
80 #define FERR_FAT_FBD 0x98 /* also called as FERR_FAT_FB_DIMM at datasheet */
81 #define FERR_FAT_FBDCHAN (3<<28) /* channel index where the highest-order error occurred */
82
83 #define NERR_FAT_FBD 0x9c
84 #define FERR_NF_FBD 0xa0 /* also called as FERR_NFAT_FB_DIMM at datasheet */
85
86 /* Non-fatal error register */
87 #define NERR_NF_FBD 0xa4
88
89 /* Enable error mask */
90 #define EMASK_FBD 0xa8
91
92 #define ERR0_FBD 0xac
93 #define ERR1_FBD 0xb0
94 #define ERR2_FBD 0xb4
95 #define MCERR_FBD 0xb8
96
97 /* No OFFSETS for Device 16 Function 2 */
98
99 /*
100 * Device 21,
101 * Function 0: Memory Map Branch 0
102 *
103 * Device 22,
104 * Function 0: Memory Map Branch 1
105 */
106
107 /* OFFSETS for Function 0 */
108 #define AMBPRESENT_0 0x64
109 #define AMBPRESENT_1 0x66
110 #define MTR0 0x80
111 #define MTR1 0x82
112 #define MTR2 0x84
113 #define MTR3 0x86
114
115 /* OFFSETS for Function 1 */
116 #define NRECFGLOG 0x74
117 #define RECFGLOG 0x78
118 #define NRECMEMA 0xbe
119 #define NRECMEMB 0xc0
120 #define NRECFB_DIMMA 0xc4
121 #define NRECFB_DIMMB 0xc8
122 #define NRECFB_DIMMC 0xcc
123 #define NRECFB_DIMMD 0xd0
124 #define NRECFB_DIMME 0xd4
125 #define NRECFB_DIMMF 0xd8
126 #define REDMEMA 0xdC
127 #define RECMEMA 0xf0
128 #define RECMEMB 0xf4
129 #define RECFB_DIMMA 0xf8
130 #define RECFB_DIMMB 0xec
131 #define RECFB_DIMMC 0xf0
132 #define RECFB_DIMMD 0xf4
133 #define RECFB_DIMME 0xf8
134 #define RECFB_DIMMF 0xfC
135
136 /*
137 * Error indicator bits and masks
138 * Error masks are according with Table 5-17 of i5400 datasheet
139 */
140
141 enum error_mask {
142 EMASK_M1 = 1<<0, /* Memory Write error on non-redundant retry */
143 EMASK_M2 = 1<<1, /* Memory or FB-DIMM configuration CRC read error */
144 EMASK_M3 = 1<<2, /* Reserved */
145 EMASK_M4 = 1<<3, /* Uncorrectable Data ECC on Replay */
146 EMASK_M5 = 1<<4, /* Aliased Uncorrectable Non-Mirrored Demand Data ECC */
147 EMASK_M6 = 1<<5, /* Unsupported on i5400 */
148 EMASK_M7 = 1<<6, /* Aliased Uncorrectable Resilver- or Spare-Copy Data ECC */
149 EMASK_M8 = 1<<7, /* Aliased Uncorrectable Patrol Data ECC */
150 EMASK_M9 = 1<<8, /* Non-Aliased Uncorrectable Non-Mirrored Demand Data ECC */
151 EMASK_M10 = 1<<9, /* Unsupported on i5400 */
152 EMASK_M11 = 1<<10, /* Non-Aliased Uncorrectable Resilver- or Spare-Copy Data ECC */
153 EMASK_M12 = 1<<11, /* Non-Aliased Uncorrectable Patrol Data ECC */
154 EMASK_M13 = 1<<12, /* Memory Write error on first attempt */
155 EMASK_M14 = 1<<13, /* FB-DIMM Configuration Write error on first attempt */
156 EMASK_M15 = 1<<14, /* Memory or FB-DIMM configuration CRC read error */
157 EMASK_M16 = 1<<15, /* Channel Failed-Over Occurred */
158 EMASK_M17 = 1<<16, /* Correctable Non-Mirrored Demand Data ECC */
159 EMASK_M18 = 1<<17, /* Unsupported on i5400 */
160 EMASK_M19 = 1<<18, /* Correctable Resilver- or Spare-Copy Data ECC */
161 EMASK_M20 = 1<<19, /* Correctable Patrol Data ECC */
162 EMASK_M21 = 1<<20, /* FB-DIMM Northbound parity error on FB-DIMM Sync Status */
163 EMASK_M22 = 1<<21, /* SPD protocol Error */
164 EMASK_M23 = 1<<22, /* Non-Redundant Fast Reset Timeout */
165 EMASK_M24 = 1<<23, /* Refresh error */
166 EMASK_M25 = 1<<24, /* Memory Write error on redundant retry */
167 EMASK_M26 = 1<<25, /* Redundant Fast Reset Timeout */
168 EMASK_M27 = 1<<26, /* Correctable Counter Threshold Exceeded */
169 EMASK_M28 = 1<<27, /* DIMM-Spare Copy Completed */
170 EMASK_M29 = 1<<28, /* DIMM-Isolation Completed */
171 };
172
173 /*
174 * Names to translate bit error into something useful
175 */
176 static const char *error_name[] = {
177 [0] = "Memory Write error on non-redundant retry",
178 [1] = "Memory or FB-DIMM configuration CRC read error",
179 /* Reserved */
180 [3] = "Uncorrectable Data ECC on Replay",
181 [4] = "Aliased Uncorrectable Non-Mirrored Demand Data ECC",
182 /* M6 Unsupported on i5400 */
183 [6] = "Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
184 [7] = "Aliased Uncorrectable Patrol Data ECC",
185 [8] = "Non-Aliased Uncorrectable Non-Mirrored Demand Data ECC",
186 /* M10 Unsupported on i5400 */
187 [10] = "Non-Aliased Uncorrectable Resilver- or Spare-Copy Data ECC",
188 [11] = "Non-Aliased Uncorrectable Patrol Data ECC",
189 [12] = "Memory Write error on first attempt",
190 [13] = "FB-DIMM Configuration Write error on first attempt",
191 [14] = "Memory or FB-DIMM configuration CRC read error",
192 [15] = "Channel Failed-Over Occurred",
193 [16] = "Correctable Non-Mirrored Demand Data ECC",
194 /* M18 Unsupported on i5400 */
195 [18] = "Correctable Resilver- or Spare-Copy Data ECC",
196 [19] = "Correctable Patrol Data ECC",
197 [20] = "FB-DIMM Northbound parity error on FB-DIMM Sync Status",
198 [21] = "SPD protocol Error",
199 [22] = "Non-Redundant Fast Reset Timeout",
200 [23] = "Refresh error",
201 [24] = "Memory Write error on redundant retry",
202 [25] = "Redundant Fast Reset Timeout",
203 [26] = "Correctable Counter Threshold Exceeded",
204 [27] = "DIMM-Spare Copy Completed",
205 [28] = "DIMM-Isolation Completed",
206 };
207
208 /* Fatal errors */
209 #define ERROR_FAT_MASK (EMASK_M1 | \
210 EMASK_M2 | \
211 EMASK_M23)
212
213 /* Correctable errors */
214 #define ERROR_NF_CORRECTABLE (EMASK_M27 | \
215 EMASK_M20 | \
216 EMASK_M19 | \
217 EMASK_M18 | \
218 EMASK_M17 | \
219 EMASK_M16)
220 #define ERROR_NF_DIMM_SPARE (EMASK_M29 | \
221 EMASK_M28)
222 #define ERROR_NF_SPD_PROTOCOL (EMASK_M22)
223 #define ERROR_NF_NORTH_CRC (EMASK_M21)
224
225 /* Recoverable errors */
226 #define ERROR_NF_RECOVERABLE (EMASK_M26 | \
227 EMASK_M25 | \
228 EMASK_M24 | \
229 EMASK_M15 | \
230 EMASK_M14 | \
231 EMASK_M13 | \
232 EMASK_M12 | \
233 EMASK_M11 | \
234 EMASK_M9 | \
235 EMASK_M8 | \
236 EMASK_M7 | \
237 EMASK_M5)
238
239 /* uncorrectable errors */
240 #define ERROR_NF_UNCORRECTABLE (EMASK_M4)
241
242 /* mask to all non-fatal errors */
243 #define ERROR_NF_MASK (ERROR_NF_CORRECTABLE | \
244 ERROR_NF_UNCORRECTABLE | \
245 ERROR_NF_RECOVERABLE | \
246 ERROR_NF_DIMM_SPARE | \
247 ERROR_NF_SPD_PROTOCOL | \
248 ERROR_NF_NORTH_CRC)
249
250 /*
251 * Define error masks for the several registers
252 */
253
254 /* Enable all fatal and non fatal errors */
255 #define ENABLE_EMASK_ALL (ERROR_FAT_MASK | ERROR_NF_MASK)
256
257 /* mask for fatal error registers */
258 #define FERR_FAT_MASK ERROR_FAT_MASK
259
260 /* masks for non-fatal error register */
261 static inline int to_nf_mask(unsigned int mask)
262 {
263 return (mask & EMASK_M29) | (mask >> 3);
264 };
265
266 static inline int from_nf_ferr(unsigned int mask)
267 {
268 return (mask & EMASK_M29) | /* Bit 28 */
269 (mask & ((1 << 28) - 1) << 3); /* Bits 0 to 27 */
270 };
271
272 #define FERR_NF_MASK to_nf_mask(ERROR_NF_MASK)
273 #define FERR_NF_CORRECTABLE to_nf_mask(ERROR_NF_CORRECTABLE)
274 #define FERR_NF_DIMM_SPARE to_nf_mask(ERROR_NF_DIMM_SPARE)
275 #define FERR_NF_SPD_PROTOCOL to_nf_mask(ERROR_NF_SPD_PROTOCOL)
276 #define FERR_NF_NORTH_CRC to_nf_mask(ERROR_NF_NORTH_CRC)
277 #define FERR_NF_RECOVERABLE to_nf_mask(ERROR_NF_RECOVERABLE)
278 #define FERR_NF_UNCORRECTABLE to_nf_mask(ERROR_NF_UNCORRECTABLE)
279
280 /* Defines to extract the vaious fields from the
281 * MTRx - Memory Technology Registers
282 */
283 #define MTR_DIMMS_PRESENT(mtr) ((mtr) & (1 << 10))
284 #define MTR_DIMMS_ETHROTTLE(mtr) ((mtr) & (1 << 9))
285 #define MTR_DRAM_WIDTH(mtr) (((mtr) & (1 << 8)) ? 8 : 4)
286 #define MTR_DRAM_BANKS(mtr) (((mtr) & (1 << 6)) ? 8 : 4)
287 #define MTR_DRAM_BANKS_ADDR_BITS(mtr) ((MTR_DRAM_BANKS(mtr) == 8) ? 3 : 2)
288 #define MTR_DIMM_RANK(mtr) (((mtr) >> 5) & 0x1)
289 #define MTR_DIMM_RANK_ADDR_BITS(mtr) (MTR_DIMM_RANK(mtr) ? 2 : 1)
290 #define MTR_DIMM_ROWS(mtr) (((mtr) >> 2) & 0x3)
291 #define MTR_DIMM_ROWS_ADDR_BITS(mtr) (MTR_DIMM_ROWS(mtr) + 13)
292 #define MTR_DIMM_COLS(mtr) ((mtr) & 0x3)
293 #define MTR_DIMM_COLS_ADDR_BITS(mtr) (MTR_DIMM_COLS(mtr) + 10)
294
295 /* This applies to FERR_NF_FB-DIMM as well as FERR_FAT_FB-DIMM */
296 static inline int extract_fbdchan_indx(u32 x)
297 {
298 return (x>>28) & 0x3;
299 }
300
301 #ifdef CONFIG_EDAC_DEBUG
302 /* MTR NUMROW */
303 static const char *numrow_toString[] = {
304 "8,192 - 13 rows",
305 "16,384 - 14 rows",
306 "32,768 - 15 rows",
307 "65,536 - 16 rows"
308 };
309
310 /* MTR NUMCOL */
311 static const char *numcol_toString[] = {
312 "1,024 - 10 columns",
313 "2,048 - 11 columns",
314 "4,096 - 12 columns",
315 "reserved"
316 };
317 #endif
318
319 /* Device name and register DID (Device ID) */
320 struct i5400_dev_info {
321 const char *ctl_name; /* name for this device */
322 u16 fsb_mapping_errors; /* DID for the branchmap,control */
323 };
324
325 /* Table of devices attributes supported by this driver */
326 static const struct i5400_dev_info i5400_devs[] = {
327 {
328 .ctl_name = "I5400",
329 .fsb_mapping_errors = PCI_DEVICE_ID_INTEL_5400_ERR,
330 },
331 };
332
333 struct i5400_dimm_info {
334 int megabytes; /* size, 0 means not present */
335 };
336
337 /* driver private data structure */
338 struct i5400_pvt {
339 struct pci_dev *system_address; /* 16.0 */
340 struct pci_dev *branchmap_werrors; /* 16.1 */
341 struct pci_dev *fsb_error_regs; /* 16.2 */
342 struct pci_dev *branch_0; /* 21.0 */
343 struct pci_dev *branch_1; /* 22.0 */
344
345 u16 tolm; /* top of low memory */
346 u64 ambase; /* AMB BAR */
347
348 u16 mir0, mir1;
349
350 u16 b0_mtr[NUM_MTRS_PER_BRANCH]; /* Memory Technlogy Reg */
351 u16 b0_ambpresent0; /* Branch 0, Channel 0 */
352 u16 b0_ambpresent1; /* Brnach 0, Channel 1 */
353
354 u16 b1_mtr[NUM_MTRS_PER_BRANCH]; /* Memory Technlogy Reg */
355 u16 b1_ambpresent0; /* Branch 1, Channel 8 */
356 u16 b1_ambpresent1; /* Branch 1, Channel 1 */
357
358 /* DIMM information matrix, allocating architecture maximums */
359 struct i5400_dimm_info dimm_info[MAX_CSROWS][MAX_CHANNELS];
360
361 /* Actual values for this controller */
362 int maxch; /* Max channels */
363 int maxdimmperch; /* Max DIMMs per channel */
364 };
365
366 /* I5400 MCH error information retrieved from Hardware */
367 struct i5400_error_info {
368 /* These registers are always read from the MC */
369 u32 ferr_fat_fbd; /* First Errors Fatal */
370 u32 nerr_fat_fbd; /* Next Errors Fatal */
371 u32 ferr_nf_fbd; /* First Errors Non-Fatal */
372 u32 nerr_nf_fbd; /* Next Errors Non-Fatal */
373
374 /* These registers are input ONLY if there was a Recoverable Error */
375 u32 redmemb; /* Recoverable Mem Data Error log B */
376 u16 recmema; /* Recoverable Mem Error log A */
377 u32 recmemb; /* Recoverable Mem Error log B */
378
379 /* These registers are input ONLY if there was a Non-Rec Error */
380 u16 nrecmema; /* Non-Recoverable Mem log A */
381 u16 nrecmemb; /* Non-Recoverable Mem log B */
382
383 };
384
385 /* note that nrec_rdwr changed from NRECMEMA to NRECMEMB between the 5000 and
386 5400 better to use an inline function than a macro in this case */
387 static inline int nrec_bank(struct i5400_error_info *info)
388 {
389 return ((info->nrecmema) >> 12) & 0x7;
390 }
391 static inline int nrec_rank(struct i5400_error_info *info)
392 {
393 return ((info->nrecmema) >> 8) & 0xf;
394 }
395 static inline int nrec_buf_id(struct i5400_error_info *info)
396 {
397 return ((info->nrecmema)) & 0xff;
398 }
399 static inline int nrec_rdwr(struct i5400_error_info *info)
400 {
401 return (info->nrecmemb) >> 31;
402 }
403 /* This applies to both NREC and REC string so it can be used with nrec_rdwr
404 and rec_rdwr */
405 static inline const char *rdwr_str(int rdwr)
406 {
407 return rdwr ? "Write" : "Read";
408 }
409 static inline int nrec_cas(struct i5400_error_info *info)
410 {
411 return ((info->nrecmemb) >> 16) & 0x1fff;
412 }
413 static inline int nrec_ras(struct i5400_error_info *info)
414 {
415 return (info->nrecmemb) & 0xffff;
416 }
417 static inline int rec_bank(struct i5400_error_info *info)
418 {
419 return ((info->recmema) >> 12) & 0x7;
420 }
421 static inline int rec_rank(struct i5400_error_info *info)
422 {
423 return ((info->recmema) >> 8) & 0xf;
424 }
425 static inline int rec_rdwr(struct i5400_error_info *info)
426 {
427 return (info->recmemb) >> 31;
428 }
429 static inline int rec_cas(struct i5400_error_info *info)
430 {
431 return ((info->recmemb) >> 16) & 0x1fff;
432 }
433 static inline int rec_ras(struct i5400_error_info *info)
434 {
435 return (info->recmemb) & 0xffff;
436 }
437
438 static struct edac_pci_ctl_info *i5400_pci;
439
440 /*
441 * i5400_get_error_info Retrieve the hardware error information from
442 * the hardware and cache it in the 'info'
443 * structure
444 */
445 static void i5400_get_error_info(struct mem_ctl_info *mci,
446 struct i5400_error_info *info)
447 {
448 struct i5400_pvt *pvt;
449 u32 value;
450
451 pvt = mci->pvt_info;
452
453 /* read in the 1st FATAL error register */
454 pci_read_config_dword(pvt->branchmap_werrors, FERR_FAT_FBD, &value);
455
456 /* Mask only the bits that the doc says are valid
457 */
458 value &= (FERR_FAT_FBDCHAN | FERR_FAT_MASK);
459
460 /* If there is an error, then read in the
461 NEXT FATAL error register and the Memory Error Log Register A
462 */
463 if (value & FERR_FAT_MASK) {
464 info->ferr_fat_fbd = value;
465
466 /* harvest the various error data we need */
467 pci_read_config_dword(pvt->branchmap_werrors,
468 NERR_FAT_FBD, &info->nerr_fat_fbd);
469 pci_read_config_word(pvt->branchmap_werrors,
470 NRECMEMA, &info->nrecmema);
471 pci_read_config_word(pvt->branchmap_werrors,
472 NRECMEMB, &info->nrecmemb);
473
474 /* Clear the error bits, by writing them back */
475 pci_write_config_dword(pvt->branchmap_werrors,
476 FERR_FAT_FBD, value);
477 } else {
478 info->ferr_fat_fbd = 0;
479 info->nerr_fat_fbd = 0;
480 info->nrecmema = 0;
481 info->nrecmemb = 0;
482 }
483
484 /* read in the 1st NON-FATAL error register */
485 pci_read_config_dword(pvt->branchmap_werrors, FERR_NF_FBD, &value);
486
487 /* If there is an error, then read in the 1st NON-FATAL error
488 * register as well */
489 if (value & FERR_NF_MASK) {
490 info->ferr_nf_fbd = value;
491
492 /* harvest the various error data we need */
493 pci_read_config_dword(pvt->branchmap_werrors,
494 NERR_NF_FBD, &info->nerr_nf_fbd);
495 pci_read_config_word(pvt->branchmap_werrors,
496 RECMEMA, &info->recmema);
497 pci_read_config_dword(pvt->branchmap_werrors,
498 RECMEMB, &info->recmemb);
499 pci_read_config_dword(pvt->branchmap_werrors,
500 REDMEMB, &info->redmemb);
501
502 /* Clear the error bits, by writing them back */
503 pci_write_config_dword(pvt->branchmap_werrors,
504 FERR_NF_FBD, value);
505 } else {
506 info->ferr_nf_fbd = 0;
507 info->nerr_nf_fbd = 0;
508 info->recmema = 0;
509 info->recmemb = 0;
510 info->redmemb = 0;
511 }
512 }
513
514 /*
515 * i5400_proccess_non_recoverable_info(struct mem_ctl_info *mci,
516 * struct i5400_error_info *info,
517 * int handle_errors);
518 *
519 * handle the Intel FATAL and unrecoverable errors, if any
520 */
521 static void i5400_proccess_non_recoverable_info(struct mem_ctl_info *mci,
522 struct i5400_error_info *info,
523 unsigned long allErrors)
524 {
525 char msg[EDAC_MC_LABEL_LEN + 1 + 90 + 80];
526 int branch;
527 int channel;
528 int bank;
529 int buf_id;
530 int rank;
531 int rdwr;
532 int ras, cas;
533 int errnum;
534 char *type = NULL;
535
536 if (!allErrors)
537 return; /* if no error, return now */
538
539 if (allErrors & ERROR_FAT_MASK)
540 type = "FATAL";
541 else if (allErrors & FERR_NF_UNCORRECTABLE)
542 type = "NON-FATAL uncorrected";
543 else
544 type = "NON-FATAL recoverable";
545
546 /* ONLY ONE of the possible error bits will be set, as per the docs */
547
548 branch = extract_fbdchan_indx(info->ferr_fat_fbd);
549 channel = branch;
550
551 /* Use the NON-Recoverable macros to extract data */
552 bank = nrec_bank(info);
553 rank = nrec_rank(info);
554 buf_id = nrec_buf_id(info);
555 rdwr = nrec_rdwr(info);
556 ras = nrec_ras(info);
557 cas = nrec_cas(info);
558
559 debugf0("\t\tCSROW= %d Channels= %d,%d (Branch= %d "
560 "DRAM Bank= %d Buffer ID = %d rdwr= %s ras= %d cas= %d)\n",
561 rank, channel, channel + 1, branch >> 1, bank,
562 buf_id, rdwr_str(rdwr), ras, cas);
563
564 /* Only 1 bit will be on */
565 errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
566
567 /* Form out message */
568 snprintf(msg, sizeof(msg),
569 "%s (Branch=%d DRAM-Bank=%d Buffer ID = %d RDWR=%s "
570 "RAS=%d CAS=%d %s Err=0x%lx (%s))",
571 type, branch >> 1, bank, buf_id, rdwr_str(rdwr), ras, cas,
572 type, allErrors, error_name[errnum]);
573
574 /* Call the helper to output message */
575 edac_mc_handle_fbd_ue(mci, rank, channel, channel + 1, msg);
576 }
577
578 /*
579 * i5400_process_fatal_error_info(struct mem_ctl_info *mci,
580 * struct i5400_error_info *info,
581 * int handle_errors);
582 *
583 * handle the Intel NON-FATAL errors, if any
584 */
585 static void i5400_process_nonfatal_error_info(struct mem_ctl_info *mci,
586 struct i5400_error_info *info)
587 {
588 char msg[EDAC_MC_LABEL_LEN + 1 + 90 + 80];
589 unsigned long allErrors;
590 int branch;
591 int channel;
592 int bank;
593 int rank;
594 int rdwr;
595 int ras, cas;
596 int errnum;
597
598 /* mask off the Error bits that are possible */
599 allErrors = from_nf_ferr(info->ferr_nf_fbd & FERR_NF_MASK);
600 if (!allErrors)
601 return; /* if no error, return now */
602
603 /* ONLY ONE of the possible error bits will be set, as per the docs */
604
605 if (allErrors & (ERROR_NF_UNCORRECTABLE | ERROR_NF_RECOVERABLE)) {
606 i5400_proccess_non_recoverable_info(mci, info, allErrors);
607 return;
608 }
609
610 /* Correctable errors */
611 if (allErrors & ERROR_NF_CORRECTABLE) {
612 debugf0("\tCorrected bits= 0x%lx\n", allErrors);
613
614 branch = extract_fbdchan_indx(info->ferr_nf_fbd);
615
616 channel = 0;
617 if (REC_ECC_LOCATOR_ODD(info->redmemb))
618 channel = 1;
619
620 /* Convert channel to be based from zero, instead of
621 * from branch base of 0 */
622 channel += branch;
623
624 bank = rec_bank(info);
625 rank = rec_rank(info);
626 rdwr = rec_rdwr(info);
627 ras = rec_ras(info);
628 cas = rec_cas(info);
629
630 /* Only 1 bit will be on */
631 errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
632
633 debugf0("\t\tCSROW= %d Channel= %d (Branch %d "
634 "DRAM Bank= %d rdwr= %s ras= %d cas= %d)\n",
635 rank, channel, branch >> 1, bank,
636 rdwr_str(rdwr), ras, cas);
637
638 /* Form out message */
639 snprintf(msg, sizeof(msg),
640 "Corrected error (Branch=%d DRAM-Bank=%d RDWR=%s "
641 "RAS=%d CAS=%d, CE Err=0x%lx (%s))",
642 branch >> 1, bank, rdwr_str(rdwr), ras, cas,
643 allErrors, error_name[errnum]);
644
645 /* Call the helper to output message */
646 edac_mc_handle_fbd_ce(mci, rank, channel, msg);
647
648 return;
649 }
650
651 /* Miscellaneous errors */
652 errnum = find_first_bit(&allErrors, ARRAY_SIZE(error_name));
653
654 branch = extract_fbdchan_indx(info->ferr_nf_fbd);
655
656 i5400_mc_printk(mci, KERN_EMERG,
657 "Non-Fatal misc error (Branch=%d Err=%#lx (%s))",
658 branch >> 1, allErrors, error_name[errnum]);
659 }
660
661 /*
662 * i5400_process_error_info Process the error info that is
663 * in the 'info' structure, previously retrieved from hardware
664 */
665 static void i5400_process_error_info(struct mem_ctl_info *mci,
666 struct i5400_error_info *info)
667 { u32 allErrors;
668
669 /* First handle any fatal errors that occurred */
670 allErrors = (info->ferr_fat_fbd & FERR_FAT_MASK);
671 i5400_proccess_non_recoverable_info(mci, info, allErrors);
672
673 /* now handle any non-fatal errors that occurred */
674 i5400_process_nonfatal_error_info(mci, info);
675 }
676
677 /*
678 * i5400_clear_error Retrieve any error from the hardware
679 * but do NOT process that error.
680 * Used for 'clearing' out of previous errors
681 * Called by the Core module.
682 */
683 static void i5400_clear_error(struct mem_ctl_info *mci)
684 {
685 struct i5400_error_info info;
686
687 i5400_get_error_info(mci, &info);
688 }
689
690 /*
691 * i5400_check_error Retrieve and process errors reported by the
692 * hardware. Called by the Core module.
693 */
694 static void i5400_check_error(struct mem_ctl_info *mci)
695 {
696 struct i5400_error_info info;
697 debugf4("MC%d: %s: %s()\n", mci->mc_idx, __FILE__, __func__);
698 i5400_get_error_info(mci, &info);
699 i5400_process_error_info(mci, &info);
700 }
701
702 /*
703 * i5400_put_devices 'put' all the devices that we have
704 * reserved via 'get'
705 */
706 static void i5400_put_devices(struct mem_ctl_info *mci)
707 {
708 struct i5400_pvt *pvt;
709
710 pvt = mci->pvt_info;
711
712 /* Decrement usage count for devices */
713 pci_dev_put(pvt->branch_1);
714 pci_dev_put(pvt->branch_0);
715 pci_dev_put(pvt->fsb_error_regs);
716 pci_dev_put(pvt->branchmap_werrors);
717 }
718
719 /*
720 * i5400_get_devices Find and perform 'get' operation on the MCH's
721 * device/functions we want to reference for this driver
722 *
723 * Need to 'get' device 16 func 1 and func 2
724 */
725 static int i5400_get_devices(struct mem_ctl_info *mci, int dev_idx)
726 {
727 struct i5400_pvt *pvt;
728 struct pci_dev *pdev;
729
730 pvt = mci->pvt_info;
731 pvt->branchmap_werrors = NULL;
732 pvt->fsb_error_regs = NULL;
733 pvt->branch_0 = NULL;
734 pvt->branch_1 = NULL;
735
736 /* Attempt to 'get' the MCH register we want */
737 pdev = NULL;
738 while (!pvt->branchmap_werrors || !pvt->fsb_error_regs) {
739 pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
740 PCI_DEVICE_ID_INTEL_5400_ERR, pdev);
741 if (!pdev) {
742 /* End of list, leave */
743 i5400_printk(KERN_ERR,
744 "'system address,Process Bus' "
745 "device not found:"
746 "vendor 0x%x device 0x%x ERR funcs "
747 "(broken BIOS?)\n",
748 PCI_VENDOR_ID_INTEL,
749 PCI_DEVICE_ID_INTEL_5400_ERR);
750 goto error;
751 }
752
753 /* Store device 16 funcs 1 and 2 */
754 switch (PCI_FUNC(pdev->devfn)) {
755 case 1:
756 pvt->branchmap_werrors = pdev;
757 break;
758 case 2:
759 pvt->fsb_error_regs = pdev;
760 break;
761 }
762 }
763
764 debugf1("System Address, processor bus- PCI Bus ID: %s %x:%x\n",
765 pci_name(pvt->system_address),
766 pvt->system_address->vendor, pvt->system_address->device);
767 debugf1("Branchmap, control and errors - PCI Bus ID: %s %x:%x\n",
768 pci_name(pvt->branchmap_werrors),
769 pvt->branchmap_werrors->vendor, pvt->branchmap_werrors->device);
770 debugf1("FSB Error Regs - PCI Bus ID: %s %x:%x\n",
771 pci_name(pvt->fsb_error_regs),
772 pvt->fsb_error_regs->vendor, pvt->fsb_error_regs->device);
773
774 pvt->branch_0 = pci_get_device(PCI_VENDOR_ID_INTEL,
775 PCI_DEVICE_ID_INTEL_5400_FBD0, NULL);
776 if (!pvt->branch_0) {
777 i5400_printk(KERN_ERR,
778 "MC: 'BRANCH 0' device not found:"
779 "vendor 0x%x device 0x%x Func 0 (broken BIOS?)\n",
780 PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_FBD0);
781 goto error;
782 }
783
784 /* If this device claims to have more than 2 channels then
785 * fetch Branch 1's information
786 */
787 if (pvt->maxch < CHANNELS_PER_BRANCH)
788 return 0;
789
790 pvt->branch_1 = pci_get_device(PCI_VENDOR_ID_INTEL,
791 PCI_DEVICE_ID_INTEL_5400_FBD1, NULL);
792 if (!pvt->branch_1) {
793 i5400_printk(KERN_ERR,
794 "MC: 'BRANCH 1' device not found:"
795 "vendor 0x%x device 0x%x Func 0 "
796 "(broken BIOS?)\n",
797 PCI_VENDOR_ID_INTEL,
798 PCI_DEVICE_ID_INTEL_5400_FBD1);
799 goto error;
800 }
801
802 return 0;
803
804 error:
805 i5400_put_devices(mci);
806 return -ENODEV;
807 }
808
809 /*
810 * determine_amb_present
811 *
812 * the information is contained in NUM_MTRS_PER_BRANCH different
813 * registers determining which of the NUM_MTRS_PER_BRANCH requires
814 * knowing which channel is in question
815 *
816 * 2 branches, each with 2 channels
817 * b0_ambpresent0 for channel '0'
818 * b0_ambpresent1 for channel '1'
819 * b1_ambpresent0 for channel '2'
820 * b1_ambpresent1 for channel '3'
821 */
822 static int determine_amb_present_reg(struct i5400_pvt *pvt, int channel)
823 {
824 int amb_present;
825
826 if (channel < CHANNELS_PER_BRANCH) {
827 if (channel & 0x1)
828 amb_present = pvt->b0_ambpresent1;
829 else
830 amb_present = pvt->b0_ambpresent0;
831 } else {
832 if (channel & 0x1)
833 amb_present = pvt->b1_ambpresent1;
834 else
835 amb_present = pvt->b1_ambpresent0;
836 }
837
838 return amb_present;
839 }
840
841 /*
842 * determine_mtr(pvt, csrow, channel)
843 *
844 * return the proper MTR register as determine by the csrow and desired channel
845 */
846 static int determine_mtr(struct i5400_pvt *pvt, int csrow, int channel)
847 {
848 int mtr;
849 int n;
850
851 /* There is one MTR for each slot pair of FB-DIMMs,
852 Each slot pair may be at branch 0 or branch 1.
853 */
854 n = csrow;
855
856 if (n >= NUM_MTRS_PER_BRANCH) {
857 debugf0("ERROR: trying to access an invalid csrow: %d\n",
858 csrow);
859 return 0;
860 }
861
862 if (channel < CHANNELS_PER_BRANCH)
863 mtr = pvt->b0_mtr[n];
864 else
865 mtr = pvt->b1_mtr[n];
866
867 return mtr;
868 }
869
870 /*
871 */
872 static void decode_mtr(int slot_row, u16 mtr)
873 {
874 int ans;
875
876 ans = MTR_DIMMS_PRESENT(mtr);
877
878 debugf2("\tMTR%d=0x%x: DIMMs are %s\n", slot_row, mtr,
879 ans ? "Present" : "NOT Present");
880 if (!ans)
881 return;
882
883 debugf2("\t\tWIDTH: x%d\n", MTR_DRAM_WIDTH(mtr));
884
885 debugf2("\t\tELECTRICAL THROTTLING is %s\n",
886 MTR_DIMMS_ETHROTTLE(mtr) ? "enabled" : "disabled");
887
888 debugf2("\t\tNUMBANK: %d bank(s)\n", MTR_DRAM_BANKS(mtr));
889 debugf2("\t\tNUMRANK: %s\n", MTR_DIMM_RANK(mtr) ? "double" : "single");
890 debugf2("\t\tNUMROW: %s\n", numrow_toString[MTR_DIMM_ROWS(mtr)]);
891 debugf2("\t\tNUMCOL: %s\n", numcol_toString[MTR_DIMM_COLS(mtr)]);
892 }
893
894 static void handle_channel(struct i5400_pvt *pvt, int csrow, int channel,
895 struct i5400_dimm_info *dinfo)
896 {
897 int mtr;
898 int amb_present_reg;
899 int addrBits;
900
901 mtr = determine_mtr(pvt, csrow, channel);
902 if (MTR_DIMMS_PRESENT(mtr)) {
903 amb_present_reg = determine_amb_present_reg(pvt, channel);
904
905 /* Determine if there is a DIMM present in this DIMM slot */
906 if (amb_present_reg & (1 << csrow)) {
907 /* Start with the number of bits for a Bank
908 * on the DRAM */
909 addrBits = MTR_DRAM_BANKS_ADDR_BITS(mtr);
910 /* Add thenumber of ROW bits */
911 addrBits += MTR_DIMM_ROWS_ADDR_BITS(mtr);
912 /* add the number of COLUMN bits */
913 addrBits += MTR_DIMM_COLS_ADDR_BITS(mtr);
914 /* add the number of RANK bits */
915 addrBits += MTR_DIMM_RANK(mtr);
916
917 addrBits += 6; /* add 64 bits per DIMM */
918 addrBits -= 20; /* divide by 2^^20 */
919 addrBits -= 3; /* 8 bits per bytes */
920
921 dinfo->megabytes = 1 << addrBits;
922 }
923 }
924 }
925
926 /*
927 * calculate_dimm_size
928 *
929 * also will output a DIMM matrix map, if debug is enabled, for viewing
930 * how the DIMMs are populated
931 */
932 static void calculate_dimm_size(struct i5400_pvt *pvt)
933 {
934 struct i5400_dimm_info *dinfo;
935 int csrow, max_csrows;
936 char *p, *mem_buffer;
937 int space, n;
938 int channel;
939
940 /* ================= Generate some debug output ================= */
941 space = PAGE_SIZE;
942 mem_buffer = p = kmalloc(space, GFP_KERNEL);
943 if (p == NULL) {
944 i5400_printk(KERN_ERR, "MC: %s:%s() kmalloc() failed\n",
945 __FILE__, __func__);
946 return;
947 }
948
949 /* Scan all the actual CSROWS
950 * and calculate the information for each DIMM
951 * Start with the highest csrow first, to display it first
952 * and work toward the 0th csrow
953 */
954 max_csrows = pvt->maxdimmperch;
955 for (csrow = max_csrows - 1; csrow >= 0; csrow--) {
956
957 /* on an odd csrow, first output a 'boundary' marker,
958 * then reset the message buffer */
959 if (csrow & 0x1) {
960 n = snprintf(p, space, "---------------------------"
961 "--------------------------------");
962 p += n;
963 space -= n;
964 debugf2("%s\n", mem_buffer);
965 p = mem_buffer;
966 space = PAGE_SIZE;
967 }
968 n = snprintf(p, space, "csrow %2d ", csrow);
969 p += n;
970 space -= n;
971
972 for (channel = 0; channel < pvt->maxch; channel++) {
973 dinfo = &pvt->dimm_info[csrow][channel];
974 handle_channel(pvt, csrow, channel, dinfo);
975 n = snprintf(p, space, "%4d MB | ", dinfo->megabytes);
976 p += n;
977 space -= n;
978 }
979 debugf2("%s\n", mem_buffer);
980 p = mem_buffer;
981 space = PAGE_SIZE;
982 }
983
984 /* Output the last bottom 'boundary' marker */
985 n = snprintf(p, space, "---------------------------"
986 "--------------------------------");
987 p += n;
988 space -= n;
989 debugf2("%s\n", mem_buffer);
990 p = mem_buffer;
991 space = PAGE_SIZE;
992
993 /* now output the 'channel' labels */
994 n = snprintf(p, space, " ");
995 p += n;
996 space -= n;
997 for (channel = 0; channel < pvt->maxch; channel++) {
998 n = snprintf(p, space, "channel %d | ", channel);
999 p += n;
1000 space -= n;
1001 }
1002
1003 /* output the last message and free buffer */
1004 debugf2("%s\n", mem_buffer);
1005 kfree(mem_buffer);
1006 }
1007
1008 /*
1009 * i5400_get_mc_regs read in the necessary registers and
1010 * cache locally
1011 *
1012 * Fills in the private data members
1013 */
1014 static void i5400_get_mc_regs(struct mem_ctl_info *mci)
1015 {
1016 struct i5400_pvt *pvt;
1017 u32 actual_tolm;
1018 u16 limit;
1019 int slot_row;
1020 int maxch;
1021 int maxdimmperch;
1022 int way0, way1;
1023
1024 pvt = mci->pvt_info;
1025
1026 pci_read_config_dword(pvt->system_address, AMBASE,
1027 (u32 *) &pvt->ambase);
1028 pci_read_config_dword(pvt->system_address, AMBASE + sizeof(u32),
1029 ((u32 *) &pvt->ambase) + sizeof(u32));
1030
1031 maxdimmperch = pvt->maxdimmperch;
1032 maxch = pvt->maxch;
1033
1034 debugf2("AMBASE= 0x%lx MAXCH= %d MAX-DIMM-Per-CH= %d\n",
1035 (long unsigned int)pvt->ambase, pvt->maxch, pvt->maxdimmperch);
1036
1037 /* Get the Branch Map regs */
1038 pci_read_config_word(pvt->branchmap_werrors, TOLM, &pvt->tolm);
1039 pvt->tolm >>= 12;
1040 debugf2("\nTOLM (number of 256M regions) =%u (0x%x)\n", pvt->tolm,
1041 pvt->tolm);
1042
1043 actual_tolm = (u32) ((1000l * pvt->tolm) >> (30 - 28));
1044 debugf2("Actual TOLM byte addr=%u.%03u GB (0x%x)\n",
1045 actual_tolm/1000, actual_tolm % 1000, pvt->tolm << 28);
1046
1047 pci_read_config_word(pvt->branchmap_werrors, MIR0, &pvt->mir0);
1048 pci_read_config_word(pvt->branchmap_werrors, MIR1, &pvt->mir1);
1049
1050 /* Get the MIR[0-1] regs */
1051 limit = (pvt->mir0 >> 4) & 0x0fff;
1052 way0 = pvt->mir0 & 0x1;
1053 way1 = pvt->mir0 & 0x2;
1054 debugf2("MIR0: limit= 0x%x WAY1= %u WAY0= %x\n", limit, way1, way0);
1055 limit = (pvt->mir1 >> 4) & 0xfff;
1056 way0 = pvt->mir1 & 0x1;
1057 way1 = pvt->mir1 & 0x2;
1058 debugf2("MIR1: limit= 0x%x WAY1= %u WAY0= %x\n", limit, way1, way0);
1059
1060 /* Get the set of MTR[0-3] regs by each branch */
1061 for (slot_row = 0; slot_row < NUM_MTRS_PER_BRANCH; slot_row++) {
1062 int where = MTR0 + (slot_row * sizeof(u16));
1063
1064 /* Branch 0 set of MTR registers */
1065 pci_read_config_word(pvt->branch_0, where,
1066 &pvt->b0_mtr[slot_row]);
1067
1068 debugf2("MTR%d where=0x%x B0 value=0x%x\n", slot_row, where,
1069 pvt->b0_mtr[slot_row]);
1070
1071 if (pvt->maxch < CHANNELS_PER_BRANCH) {
1072 pvt->b1_mtr[slot_row] = 0;
1073 continue;
1074 }
1075
1076 /* Branch 1 set of MTR registers */
1077 pci_read_config_word(pvt->branch_1, where,
1078 &pvt->b1_mtr[slot_row]);
1079 debugf2("MTR%d where=0x%x B1 value=0x%x\n", slot_row, where,
1080 pvt->b1_mtr[slot_row]);
1081 }
1082
1083 /* Read and dump branch 0's MTRs */
1084 debugf2("\nMemory Technology Registers:\n");
1085 debugf2(" Branch 0:\n");
1086 for (slot_row = 0; slot_row < NUM_MTRS_PER_BRANCH; slot_row++)
1087 decode_mtr(slot_row, pvt->b0_mtr[slot_row]);
1088
1089 pci_read_config_word(pvt->branch_0, AMBPRESENT_0,
1090 &pvt->b0_ambpresent0);
1091 debugf2("\t\tAMB-Branch 0-present0 0x%x:\n", pvt->b0_ambpresent0);
1092 pci_read_config_word(pvt->branch_0, AMBPRESENT_1,
1093 &pvt->b0_ambpresent1);
1094 debugf2("\t\tAMB-Branch 0-present1 0x%x:\n", pvt->b0_ambpresent1);
1095
1096 /* Only if we have 2 branchs (4 channels) */
1097 if (pvt->maxch < CHANNELS_PER_BRANCH) {
1098 pvt->b1_ambpresent0 = 0;
1099 pvt->b1_ambpresent1 = 0;
1100 } else {
1101 /* Read and dump branch 1's MTRs */
1102 debugf2(" Branch 1:\n");
1103 for (slot_row = 0; slot_row < NUM_MTRS_PER_BRANCH; slot_row++)
1104 decode_mtr(slot_row, pvt->b1_mtr[slot_row]);
1105
1106 pci_read_config_word(pvt->branch_1, AMBPRESENT_0,
1107 &pvt->b1_ambpresent0);
1108 debugf2("\t\tAMB-Branch 1-present0 0x%x:\n",
1109 pvt->b1_ambpresent0);
1110 pci_read_config_word(pvt->branch_1, AMBPRESENT_1,
1111 &pvt->b1_ambpresent1);
1112 debugf2("\t\tAMB-Branch 1-present1 0x%x:\n",
1113 pvt->b1_ambpresent1);
1114 }
1115
1116 /* Go and determine the size of each DIMM and place in an
1117 * orderly matrix */
1118 calculate_dimm_size(pvt);
1119 }
1120
1121 /*
1122 * i5400_init_csrows Initialize the 'csrows' table within
1123 * the mci control structure with the
1124 * addressing of memory.
1125 *
1126 * return:
1127 * 0 success
1128 * 1 no actual memory found on this MC
1129 */
1130 static int i5400_init_csrows(struct mem_ctl_info *mci)
1131 {
1132 struct i5400_pvt *pvt;
1133 struct csrow_info *p_csrow;
1134 int empty, channel_count;
1135 int max_csrows;
1136 int mtr;
1137 int csrow_megs;
1138 int channel;
1139 int csrow;
1140
1141 pvt = mci->pvt_info;
1142
1143 channel_count = pvt->maxch;
1144 max_csrows = pvt->maxdimmperch;
1145
1146 empty = 1; /* Assume NO memory */
1147
1148 for (csrow = 0; csrow < max_csrows; csrow++) {
1149 p_csrow = &mci->csrows[csrow];
1150
1151 p_csrow->csrow_idx = csrow;
1152
1153 /* use branch 0 for the basis */
1154 mtr = determine_mtr(pvt, csrow, 0);
1155
1156 /* if no DIMMS on this row, continue */
1157 if (!MTR_DIMMS_PRESENT(mtr))
1158 continue;
1159
1160 /* FAKE OUT VALUES, FIXME */
1161 p_csrow->first_page = 0 + csrow * 20;
1162 p_csrow->last_page = 9 + csrow * 20;
1163 p_csrow->page_mask = 0xFFF;
1164
1165 p_csrow->grain = 8;
1166
1167 csrow_megs = 0;
1168 for (channel = 0; channel < pvt->maxch; channel++)
1169 csrow_megs += pvt->dimm_info[csrow][channel].megabytes;
1170
1171 p_csrow->nr_pages = csrow_megs << 8;
1172
1173 /* Assume DDR2 for now */
1174 p_csrow->mtype = MEM_FB_DDR2;
1175
1176 /* ask what device type on this row */
1177 if (MTR_DRAM_WIDTH(mtr))
1178 p_csrow->dtype = DEV_X8;
1179 else
1180 p_csrow->dtype = DEV_X4;
1181
1182 p_csrow->edac_mode = EDAC_S8ECD8ED;
1183
1184 empty = 0;
1185 }
1186
1187 return empty;
1188 }
1189
1190 /*
1191 * i5400_enable_error_reporting
1192 * Turn on the memory reporting features of the hardware
1193 */
1194 static void i5400_enable_error_reporting(struct mem_ctl_info *mci)
1195 {
1196 struct i5400_pvt *pvt;
1197 u32 fbd_error_mask;
1198
1199 pvt = mci->pvt_info;
1200
1201 /* Read the FBD Error Mask Register */
1202 pci_read_config_dword(pvt->branchmap_werrors, EMASK_FBD,
1203 &fbd_error_mask);
1204
1205 /* Enable with a '0' */
1206 fbd_error_mask &= ~(ENABLE_EMASK_ALL);
1207
1208 pci_write_config_dword(pvt->branchmap_werrors, EMASK_FBD,
1209 fbd_error_mask);
1210 }
1211
1212 /*
1213 * i5400_probe1 Probe for ONE instance of device to see if it is
1214 * present.
1215 * return:
1216 * 0 for FOUND a device
1217 * < 0 for error code
1218 */
1219 static int i5400_probe1(struct pci_dev *pdev, int dev_idx)
1220 {
1221 struct mem_ctl_info *mci;
1222 struct i5400_pvt *pvt;
1223 int num_channels;
1224 int num_dimms_per_channel;
1225 int num_csrows;
1226
1227 if (dev_idx >= ARRAY_SIZE(i5400_devs))
1228 return -EINVAL;
1229
1230 debugf0("MC: %s: %s(), pdev bus %u dev=0x%x fn=0x%x\n",
1231 __FILE__, __func__,
1232 pdev->bus->number,
1233 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
1234
1235 /* We only are looking for func 0 of the set */
1236 if (PCI_FUNC(pdev->devfn) != 0)
1237 return -ENODEV;
1238
1239 /* As we don't have a motherboard identification routine to determine
1240 * actual number of slots/dimms per channel, we thus utilize the
1241 * resource as specified by the chipset. Thus, we might have
1242 * have more DIMMs per channel than actually on the mobo, but this
1243 * allows the driver to support up to the chipset max, without
1244 * some fancy mobo determination.
1245 */
1246 num_dimms_per_channel = MAX_DIMMS_PER_CHANNEL;
1247 num_channels = MAX_CHANNELS;
1248 num_csrows = num_dimms_per_channel;
1249
1250 debugf0("MC: %s(): Number of - Channels= %d DIMMS= %d CSROWS= %d\n",
1251 __func__, num_channels, num_dimms_per_channel, num_csrows);
1252
1253 /* allocate a new MC control structure */
1254 mci = edac_mc_alloc(sizeof(*pvt), num_csrows, num_channels, 0);
1255
1256 if (mci == NULL)
1257 return -ENOMEM;
1258
1259 debugf0("MC: %s: %s(): mci = %p\n", __FILE__, __func__, mci);
1260
1261 mci->dev = &pdev->dev; /* record ptr to the generic device */
1262
1263 pvt = mci->pvt_info;
1264 pvt->system_address = pdev; /* Record this device in our private */
1265 pvt->maxch = num_channels;
1266 pvt->maxdimmperch = num_dimms_per_channel;
1267
1268 /* 'get' the pci devices we want to reserve for our use */
1269 if (i5400_get_devices(mci, dev_idx))
1270 goto fail0;
1271
1272 /* Time to get serious */
1273 i5400_get_mc_regs(mci); /* retrieve the hardware registers */
1274
1275 mci->mc_idx = 0;
1276 mci->mtype_cap = MEM_FLAG_FB_DDR2;
1277 mci->edac_ctl_cap = EDAC_FLAG_NONE;
1278 mci->edac_cap = EDAC_FLAG_NONE;
1279 mci->mod_name = "i5400_edac.c";
1280 mci->mod_ver = I5400_REVISION;
1281 mci->ctl_name = i5400_devs[dev_idx].ctl_name;
1282 mci->dev_name = pci_name(pdev);
1283 mci->ctl_page_to_phys = NULL;
1284
1285 /* Set the function pointer to an actual operation function */
1286 mci->edac_check = i5400_check_error;
1287
1288 /* initialize the MC control structure 'csrows' table
1289 * with the mapping and control information */
1290 if (i5400_init_csrows(mci)) {
1291 debugf0("MC: Setting mci->edac_cap to EDAC_FLAG_NONE\n"
1292 " because i5400_init_csrows() returned nonzero "
1293 "value\n");
1294 mci->edac_cap = EDAC_FLAG_NONE; /* no csrows found */
1295 } else {
1296 debugf1("MC: Enable error reporting now\n");
1297 i5400_enable_error_reporting(mci);
1298 }
1299
1300 /* add this new MC control structure to EDAC's list of MCs */
1301 if (edac_mc_add_mc(mci)) {
1302 debugf0("MC: %s: %s(): failed edac_mc_add_mc()\n",
1303 __FILE__, __func__);
1304 /* FIXME: perhaps some code should go here that disables error
1305 * reporting if we just enabled it
1306 */
1307 goto fail1;
1308 }
1309
1310 i5400_clear_error(mci);
1311
1312 /* allocating generic PCI control info */
1313 i5400_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
1314 if (!i5400_pci) {
1315 printk(KERN_WARNING
1316 "%s(): Unable to create PCI control\n",
1317 __func__);
1318 printk(KERN_WARNING
1319 "%s(): PCI error report via EDAC not setup\n",
1320 __func__);
1321 }
1322
1323 return 0;
1324
1325 /* Error exit unwinding stack */
1326 fail1:
1327
1328 i5400_put_devices(mci);
1329
1330 fail0:
1331 edac_mc_free(mci);
1332 return -ENODEV;
1333 }
1334
1335 /*
1336 * i5400_init_one constructor for one instance of device
1337 *
1338 * returns:
1339 * negative on error
1340 * count (>= 0)
1341 */
1342 static int __devinit i5400_init_one(struct pci_dev *pdev,
1343 const struct pci_device_id *id)
1344 {
1345 int rc;
1346
1347 debugf0("MC: %s: %s()\n", __FILE__, __func__);
1348
1349 /* wake up device */
1350 rc = pci_enable_device(pdev);
1351 if (rc)
1352 return rc;
1353
1354 /* now probe and enable the device */
1355 return i5400_probe1(pdev, id->driver_data);
1356 }
1357
1358 /*
1359 * i5400_remove_one destructor for one instance of device
1360 *
1361 */
1362 static void __devexit i5400_remove_one(struct pci_dev *pdev)
1363 {
1364 struct mem_ctl_info *mci;
1365
1366 debugf0("%s: %s()\n", __FILE__, __func__);
1367
1368 if (i5400_pci)
1369 edac_pci_release_generic_ctl(i5400_pci);
1370
1371 mci = edac_mc_del_mc(&pdev->dev);
1372 if (!mci)
1373 return;
1374
1375 /* retrieve references to resources, and free those resources */
1376 i5400_put_devices(mci);
1377
1378 edac_mc_free(mci);
1379 }
1380
1381 /*
1382 * pci_device_id table for which devices we are looking for
1383 *
1384 * The "E500P" device is the first device supported.
1385 */
1386 static const struct pci_device_id i5400_pci_tbl[] __devinitdata = {
1387 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR)},
1388 {0,} /* 0 terminated list. */
1389 };
1390
1391 MODULE_DEVICE_TABLE(pci, i5400_pci_tbl);
1392
1393 /*
1394 * i5400_driver pci_driver structure for this module
1395 *
1396 */
1397 static struct pci_driver i5400_driver = {
1398 .name = "i5400_edac",
1399 .probe = i5400_init_one,
1400 .remove = __devexit_p(i5400_remove_one),
1401 .id_table = i5400_pci_tbl,
1402 };
1403
1404 /*
1405 * i5400_init Module entry function
1406 * Try to initialize this module for its devices
1407 */
1408 static int __init i5400_init(void)
1409 {
1410 int pci_rc;
1411
1412 debugf2("MC: %s: %s()\n", __FILE__, __func__);
1413
1414 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
1415 opstate_init();
1416
1417 pci_rc = pci_register_driver(&i5400_driver);
1418
1419 return (pci_rc < 0) ? pci_rc : 0;
1420 }
1421
1422 /*
1423 * i5400_exit() Module exit function
1424 * Unregister the driver
1425 */
1426 static void __exit i5400_exit(void)
1427 {
1428 debugf2("MC: %s: %s()\n", __FILE__, __func__);
1429 pci_unregister_driver(&i5400_driver);
1430 }
1431
1432 module_init(i5400_init);
1433 module_exit(i5400_exit);
1434
1435 MODULE_LICENSE("GPL");
1436 MODULE_AUTHOR("Ben Woodard <woodard@redhat.com>");
1437 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
1438 MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
1439 MODULE_DESCRIPTION("MC Driver for Intel I5400 memory controllers - "
1440 I5400_REVISION);
1441
1442 module_param(edac_op_state, int, 0444);
1443 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");