Merge tag 'edac_for_4.20_2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
[sfrench/cifs-2.6.git] / drivers / edac / e7xxx_edac.c
1 /*
2  * Intel e7xxx Memory Controller kernel module
3  * (C) 2003 Linux Networx (http://lnxi.com)
4  * This file may be distributed under the terms of the
5  * GNU General Public License.
6  *
7  * See "enum e7xxx_chips" below for supported chipsets
8  *
9  * Written by Thayne Harbaugh
10  * Based on work by Dan Hollis <goemon at anime dot net> and others.
11  *      http://www.anime.net/~goemon/linux-ecc/
12  *
13  * Datasheet:
14  *      http://www.intel.com/content/www/us/en/chipsets/e7501-chipset-memory-controller-hub-datasheet.html
15  *
16  * Contributors:
17  *      Eric Biederman (Linux Networx)
18  *      Tom Zimmerman (Linux Networx)
19  *      Jim Garlick (Lawrence Livermore National Labs)
20  *      Dave Peterson (Lawrence Livermore National Labs)
21  *      That One Guy (Some other place)
22  *      Wang Zhenyu (intel.com)
23  *
24  * $Id: edac_e7xxx.c,v 1.5.2.9 2005/10/05 00:43:44 dsp_llnl Exp $
25  *
26  */
27
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/pci.h>
31 #include <linux/pci_ids.h>
32 #include <linux/edac.h>
33 #include "edac_module.h"
34
35 #define EDAC_MOD_STR    "e7xxx_edac"
36
37 #define e7xxx_printk(level, fmt, arg...) \
38         edac_printk(level, "e7xxx", fmt, ##arg)
39
40 #define e7xxx_mc_printk(mci, level, fmt, arg...) \
41         edac_mc_chipset_printk(mci, level, "e7xxx", fmt, ##arg)
42
43 #ifndef PCI_DEVICE_ID_INTEL_7205_0
44 #define PCI_DEVICE_ID_INTEL_7205_0      0x255d
45 #endif                          /* PCI_DEVICE_ID_INTEL_7205_0 */
46
47 #ifndef PCI_DEVICE_ID_INTEL_7205_1_ERR
48 #define PCI_DEVICE_ID_INTEL_7205_1_ERR  0x2551
49 #endif                          /* PCI_DEVICE_ID_INTEL_7205_1_ERR */
50
51 #ifndef PCI_DEVICE_ID_INTEL_7500_0
52 #define PCI_DEVICE_ID_INTEL_7500_0      0x2540
53 #endif                          /* PCI_DEVICE_ID_INTEL_7500_0 */
54
55 #ifndef PCI_DEVICE_ID_INTEL_7500_1_ERR
56 #define PCI_DEVICE_ID_INTEL_7500_1_ERR  0x2541
57 #endif                          /* PCI_DEVICE_ID_INTEL_7500_1_ERR */
58
59 #ifndef PCI_DEVICE_ID_INTEL_7501_0
60 #define PCI_DEVICE_ID_INTEL_7501_0      0x254c
61 #endif                          /* PCI_DEVICE_ID_INTEL_7501_0 */
62
63 #ifndef PCI_DEVICE_ID_INTEL_7501_1_ERR
64 #define PCI_DEVICE_ID_INTEL_7501_1_ERR  0x2541
65 #endif                          /* PCI_DEVICE_ID_INTEL_7501_1_ERR */
66
67 #ifndef PCI_DEVICE_ID_INTEL_7505_0
68 #define PCI_DEVICE_ID_INTEL_7505_0      0x2550
69 #endif                          /* PCI_DEVICE_ID_INTEL_7505_0 */
70
71 #ifndef PCI_DEVICE_ID_INTEL_7505_1_ERR
72 #define PCI_DEVICE_ID_INTEL_7505_1_ERR  0x2551
73 #endif                          /* PCI_DEVICE_ID_INTEL_7505_1_ERR */
74
75 #define E7XXX_NR_CSROWS         8       /* number of csrows */
76 #define E7XXX_NR_DIMMS          8       /* 2 channels, 4 dimms/channel */
77
78 /* E7XXX register addresses - device 0 function 0 */
79 #define E7XXX_DRB               0x60    /* DRAM row boundary register (8b) */
80 #define E7XXX_DRA               0x70    /* DRAM row attribute register (8b) */
81                                         /*
82                                          * 31   Device width row 7 0=x8 1=x4
83                                          * 27   Device width row 6
84                                          * 23   Device width row 5
85                                          * 19   Device width row 4
86                                          * 15   Device width row 3
87                                          * 11   Device width row 2
88                                          *  7   Device width row 1
89                                          *  3   Device width row 0
90                                          */
91 #define E7XXX_DRC               0x7C    /* DRAM controller mode reg (32b) */
92                                         /*
93                                          * 22    Number channels 0=1,1=2
94                                          * 19:18 DRB Granularity 32/64MB
95                                          */
96 #define E7XXX_TOLM              0xC4    /* DRAM top of low memory reg (16b) */
97 #define E7XXX_REMAPBASE         0xC6    /* DRAM remap base address reg (16b) */
98 #define E7XXX_REMAPLIMIT        0xC8    /* DRAM remap limit address reg (16b) */
99
100 /* E7XXX register addresses - device 0 function 1 */
101 #define E7XXX_DRAM_FERR         0x80    /* DRAM first error register (8b) */
102 #define E7XXX_DRAM_NERR         0x82    /* DRAM next error register (8b) */
103 #define E7XXX_DRAM_CELOG_ADD    0xA0    /* DRAM first correctable memory */
104                                         /*     error address register (32b) */
105                                         /*
106                                          * 31:28 Reserved
107                                          * 27:6  CE address (4k block 33:12)
108                                          *  5:0  Reserved
109                                          */
110 #define E7XXX_DRAM_UELOG_ADD    0xB0    /* DRAM first uncorrectable memory */
111                                         /*     error address register (32b) */
112                                         /*
113                                          * 31:28 Reserved
114                                          * 27:6  CE address (4k block 33:12)
115                                          *  5:0  Reserved
116                                          */
117 #define E7XXX_DRAM_CELOG_SYNDROME 0xD0  /* DRAM first correctable memory */
118                                         /*     error syndrome register (16b) */
119
120 enum e7xxx_chips {
121         E7500 = 0,
122         E7501,
123         E7505,
124         E7205,
125 };
126
127 struct e7xxx_pvt {
128         struct pci_dev *bridge_ck;
129         u32 tolm;
130         u32 remapbase;
131         u32 remaplimit;
132         const struct e7xxx_dev_info *dev_info;
133 };
134
135 struct e7xxx_dev_info {
136         u16 err_dev;
137         const char *ctl_name;
138 };
139
140 struct e7xxx_error_info {
141         u8 dram_ferr;
142         u8 dram_nerr;
143         u32 dram_celog_add;
144         u16 dram_celog_syndrome;
145         u32 dram_uelog_add;
146 };
147
148 static struct edac_pci_ctl_info *e7xxx_pci;
149
150 static const struct e7xxx_dev_info e7xxx_devs[] = {
151         [E7500] = {
152                 .err_dev = PCI_DEVICE_ID_INTEL_7500_1_ERR,
153                 .ctl_name = "E7500"},
154         [E7501] = {
155                 .err_dev = PCI_DEVICE_ID_INTEL_7501_1_ERR,
156                 .ctl_name = "E7501"},
157         [E7505] = {
158                 .err_dev = PCI_DEVICE_ID_INTEL_7505_1_ERR,
159                 .ctl_name = "E7505"},
160         [E7205] = {
161                 .err_dev = PCI_DEVICE_ID_INTEL_7205_1_ERR,
162                 .ctl_name = "E7205"},
163 };
164
165 /* FIXME - is this valid for both SECDED and S4ECD4ED? */
166 static inline int e7xxx_find_channel(u16 syndrome)
167 {
168         edac_dbg(3, "\n");
169
170         if ((syndrome & 0xff00) == 0)
171                 return 0;
172
173         if ((syndrome & 0x00ff) == 0)
174                 return 1;
175
176         if ((syndrome & 0xf000) == 0 || (syndrome & 0x0f00) == 0)
177                 return 0;
178
179         return 1;
180 }
181
182 static unsigned long ctl_page_to_phys(struct mem_ctl_info *mci,
183                                 unsigned long page)
184 {
185         u32 remap;
186         struct e7xxx_pvt *pvt = (struct e7xxx_pvt *)mci->pvt_info;
187
188         edac_dbg(3, "\n");
189
190         if ((page < pvt->tolm) ||
191                 ((page >= 0x100000) && (page < pvt->remapbase)))
192                 return page;
193
194         remap = (page - pvt->tolm) + pvt->remapbase;
195
196         if (remap < pvt->remaplimit)
197                 return remap;
198
199         e7xxx_printk(KERN_ERR, "Invalid page %lx - out of range\n", page);
200         return pvt->tolm - 1;
201 }
202
203 static void process_ce(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
204 {
205         u32 error_1b, page;
206         u16 syndrome;
207         int row;
208         int channel;
209
210         edac_dbg(3, "\n");
211         /* read the error address */
212         error_1b = info->dram_celog_add;
213         /* FIXME - should use PAGE_SHIFT */
214         page = error_1b >> 6;   /* convert the address to 4k page */
215         /* read the syndrome */
216         syndrome = info->dram_celog_syndrome;
217         /* FIXME - check for -1 */
218         row = edac_mc_find_csrow_by_page(mci, page);
219         /* convert syndrome to channel */
220         channel = e7xxx_find_channel(syndrome);
221         edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, page, 0, syndrome,
222                              row, channel, -1, "e7xxx CE", "");
223 }
224
225 static void process_ce_no_info(struct mem_ctl_info *mci)
226 {
227         edac_dbg(3, "\n");
228         edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
229                              "e7xxx CE log register overflow", "");
230 }
231
232 static void process_ue(struct mem_ctl_info *mci, struct e7xxx_error_info *info)
233 {
234         u32 error_2b, block_page;
235         int row;
236
237         edac_dbg(3, "\n");
238         /* read the error address */
239         error_2b = info->dram_uelog_add;
240         /* FIXME - should use PAGE_SHIFT */
241         block_page = error_2b >> 6;     /* convert to 4k address */
242         row = edac_mc_find_csrow_by_page(mci, block_page);
243
244         edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, block_page, 0, 0,
245                              row, -1, -1, "e7xxx UE", "");
246 }
247
248 static void process_ue_no_info(struct mem_ctl_info *mci)
249 {
250         edac_dbg(3, "\n");
251
252         edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0, -1, -1, -1,
253                              "e7xxx UE log register overflow", "");
254 }
255
256 static void e7xxx_get_error_info(struct mem_ctl_info *mci,
257                                  struct e7xxx_error_info *info)
258 {
259         struct e7xxx_pvt *pvt;
260
261         pvt = (struct e7xxx_pvt *)mci->pvt_info;
262         pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_FERR, &info->dram_ferr);
263         pci_read_config_byte(pvt->bridge_ck, E7XXX_DRAM_NERR, &info->dram_nerr);
264
265         if ((info->dram_ferr & 1) || (info->dram_nerr & 1)) {
266                 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_CELOG_ADD,
267                                 &info->dram_celog_add);
268                 pci_read_config_word(pvt->bridge_ck,
269                                 E7XXX_DRAM_CELOG_SYNDROME,
270                                 &info->dram_celog_syndrome);
271         }
272
273         if ((info->dram_ferr & 2) || (info->dram_nerr & 2))
274                 pci_read_config_dword(pvt->bridge_ck, E7XXX_DRAM_UELOG_ADD,
275                                 &info->dram_uelog_add);
276
277         if (info->dram_ferr & 3)
278                 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_FERR, 0x03, 0x03);
279
280         if (info->dram_nerr & 3)
281                 pci_write_bits8(pvt->bridge_ck, E7XXX_DRAM_NERR, 0x03, 0x03);
282 }
283
284 static int e7xxx_process_error_info(struct mem_ctl_info *mci,
285                                 struct e7xxx_error_info *info,
286                                 int handle_errors)
287 {
288         int error_found;
289
290         error_found = 0;
291
292         /* decode and report errors */
293         if (info->dram_ferr & 1) {      /* check first error correctable */
294                 error_found = 1;
295
296                 if (handle_errors)
297                         process_ce(mci, info);
298         }
299
300         if (info->dram_ferr & 2) {      /* check first error uncorrectable */
301                 error_found = 1;
302
303                 if (handle_errors)
304                         process_ue(mci, info);
305         }
306
307         if (info->dram_nerr & 1) {      /* check next error correctable */
308                 error_found = 1;
309
310                 if (handle_errors) {
311                         if (info->dram_ferr & 1)
312                                 process_ce_no_info(mci);
313                         else
314                                 process_ce(mci, info);
315                 }
316         }
317
318         if (info->dram_nerr & 2) {      /* check next error uncorrectable */
319                 error_found = 1;
320
321                 if (handle_errors) {
322                         if (info->dram_ferr & 2)
323                                 process_ue_no_info(mci);
324                         else
325                                 process_ue(mci, info);
326                 }
327         }
328
329         return error_found;
330 }
331
332 static void e7xxx_check(struct mem_ctl_info *mci)
333 {
334         struct e7xxx_error_info info;
335
336         edac_dbg(3, "\n");
337         e7xxx_get_error_info(mci, &info);
338         e7xxx_process_error_info(mci, &info, 1);
339 }
340
341 /* Return 1 if dual channel mode is active.  Else return 0. */
342 static inline int dual_channel_active(u32 drc, int dev_idx)
343 {
344         return (dev_idx == E7501) ? ((drc >> 22) & 0x1) : 1;
345 }
346
347 /* Return DRB granularity (0=32mb, 1=64mb). */
348 static inline int drb_granularity(u32 drc, int dev_idx)
349 {
350         /* only e7501 can be single channel */
351         return (dev_idx == E7501) ? ((drc >> 18) & 0x3) : 1;
352 }
353
354 static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
355                         int dev_idx, u32 drc)
356 {
357         unsigned long last_cumul_size;
358         int index, j;
359         u8 value;
360         u32 dra, cumul_size, nr_pages;
361         int drc_chan, drc_drbg, drc_ddim, mem_dev;
362         struct csrow_info *csrow;
363         struct dimm_info *dimm;
364         enum edac_type edac_mode;
365
366         pci_read_config_dword(pdev, E7XXX_DRA, &dra);
367         drc_chan = dual_channel_active(drc, dev_idx);
368         drc_drbg = drb_granularity(drc, dev_idx);
369         drc_ddim = (drc >> 20) & 0x3;
370         last_cumul_size = 0;
371
372         /* The dram row boundary (DRB) reg values are boundary address
373          * for each DRAM row with a granularity of 32 or 64MB (single/dual
374          * channel operation).  DRB regs are cumulative; therefore DRB7 will
375          * contain the total memory contained in all eight rows.
376          */
377         for (index = 0; index < mci->nr_csrows; index++) {
378                 /* mem_dev 0=x8, 1=x4 */
379                 mem_dev = (dra >> (index * 4 + 3)) & 0x1;
380                 csrow = mci->csrows[index];
381
382                 pci_read_config_byte(pdev, E7XXX_DRB + index, &value);
383                 /* convert a 64 or 32 MiB DRB to a page size. */
384                 cumul_size = value << (25 + drc_drbg - PAGE_SHIFT);
385                 edac_dbg(3, "(%d) cumul_size 0x%x\n", index, cumul_size);
386                 if (cumul_size == last_cumul_size)
387                         continue;       /* not populated */
388
389                 csrow->first_page = last_cumul_size;
390                 csrow->last_page = cumul_size - 1;
391                 nr_pages = cumul_size - last_cumul_size;
392                 last_cumul_size = cumul_size;
393
394                 /*
395                 * if single channel or x8 devices then SECDED
396                 * if dual channel and x4 then S4ECD4ED
397                 */
398                 if (drc_ddim) {
399                         if (drc_chan && mem_dev) {
400                                 edac_mode = EDAC_S4ECD4ED;
401                                 mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
402                         } else {
403                                 edac_mode = EDAC_SECDED;
404                                 mci->edac_cap |= EDAC_FLAG_SECDED;
405                         }
406                 } else
407                         edac_mode = EDAC_NONE;
408
409                 for (j = 0; j < drc_chan + 1; j++) {
410                         dimm = csrow->channels[j]->dimm;
411
412                         dimm->nr_pages = nr_pages / (drc_chan + 1);
413                         dimm->grain = 1 << 12;  /* 4KiB - resolution of CELOG */
414                         dimm->mtype = MEM_RDDR; /* only one type supported */
415                         dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
416                         dimm->edac_mode = edac_mode;
417                 }
418         }
419 }
420
421 static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
422 {
423         u16 pci_data;
424         struct mem_ctl_info *mci = NULL;
425         struct edac_mc_layer layers[2];
426         struct e7xxx_pvt *pvt = NULL;
427         u32 drc;
428         int drc_chan;
429         struct e7xxx_error_info discard;
430
431         edac_dbg(0, "mci\n");
432
433         pci_read_config_dword(pdev, E7XXX_DRC, &drc);
434
435         drc_chan = dual_channel_active(drc, dev_idx);
436         /*
437          * According with the datasheet, this device has a maximum of
438          * 4 DIMMS per channel, either single-rank or dual-rank. So, the
439          * total amount of dimms is 8 (E7XXX_NR_DIMMS).
440          * That means that the DIMM is mapped as CSROWs, and the channel
441          * will map the rank. So, an error to either channel should be
442          * attributed to the same dimm.
443          */
444         layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
445         layers[0].size = E7XXX_NR_CSROWS;
446         layers[0].is_virt_csrow = true;
447         layers[1].type = EDAC_MC_LAYER_CHANNEL;
448         layers[1].size = drc_chan + 1;
449         layers[1].is_virt_csrow = false;
450         mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
451         if (mci == NULL)
452                 return -ENOMEM;
453
454         edac_dbg(3, "init mci\n");
455         mci->mtype_cap = MEM_FLAG_RDDR;
456         mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED |
457                 EDAC_FLAG_S4ECD4ED;
458         /* FIXME - what if different memory types are in different csrows? */
459         mci->mod_name = EDAC_MOD_STR;
460         mci->pdev = &pdev->dev;
461         edac_dbg(3, "init pvt\n");
462         pvt = (struct e7xxx_pvt *)mci->pvt_info;
463         pvt->dev_info = &e7xxx_devs[dev_idx];
464         pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
465                                         pvt->dev_info->err_dev, pvt->bridge_ck);
466
467         if (!pvt->bridge_ck) {
468                 e7xxx_printk(KERN_ERR, "error reporting device not found:"
469                         "vendor %x device 0x%x (broken BIOS?)\n",
470                         PCI_VENDOR_ID_INTEL, e7xxx_devs[dev_idx].err_dev);
471                 goto fail0;
472         }
473
474         edac_dbg(3, "more mci init\n");
475         mci->ctl_name = pvt->dev_info->ctl_name;
476         mci->dev_name = pci_name(pdev);
477         mci->edac_check = e7xxx_check;
478         mci->ctl_page_to_phys = ctl_page_to_phys;
479         e7xxx_init_csrows(mci, pdev, dev_idx, drc);
480         mci->edac_cap |= EDAC_FLAG_NONE;
481         edac_dbg(3, "tolm, remapbase, remaplimit\n");
482         /* load the top of low memory, remap base, and remap limit vars */
483         pci_read_config_word(pdev, E7XXX_TOLM, &pci_data);
484         pvt->tolm = ((u32) pci_data) << 4;
485         pci_read_config_word(pdev, E7XXX_REMAPBASE, &pci_data);
486         pvt->remapbase = ((u32) pci_data) << 14;
487         pci_read_config_word(pdev, E7XXX_REMAPLIMIT, &pci_data);
488         pvt->remaplimit = ((u32) pci_data) << 14;
489         e7xxx_printk(KERN_INFO,
490                 "tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
491                 pvt->remapbase, pvt->remaplimit);
492
493         /* clear any pending errors, or initial state bits */
494         e7xxx_get_error_info(mci, &discard);
495
496         /* Here we assume that we will never see multiple instances of this
497          * type of memory controller.  The ID is therefore hardcoded to 0.
498          */
499         if (edac_mc_add_mc(mci)) {
500                 edac_dbg(3, "failed edac_mc_add_mc()\n");
501                 goto fail1;
502         }
503
504         /* allocating generic PCI control info */
505         e7xxx_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
506         if (!e7xxx_pci) {
507                 printk(KERN_WARNING
508                         "%s(): Unable to create PCI control\n",
509                         __func__);
510                 printk(KERN_WARNING
511                         "%s(): PCI error report via EDAC not setup\n",
512                         __func__);
513         }
514
515         /* get this far and it's successful */
516         edac_dbg(3, "success\n");
517         return 0;
518
519 fail1:
520         pci_dev_put(pvt->bridge_ck);
521
522 fail0:
523         edac_mc_free(mci);
524
525         return -ENODEV;
526 }
527
528 /* returns count (>= 0), or negative on error */
529 static int e7xxx_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
530 {
531         edac_dbg(0, "\n");
532
533         /* wake up and enable device */
534         return pci_enable_device(pdev) ?
535                 -EIO : e7xxx_probe1(pdev, ent->driver_data);
536 }
537
538 static void e7xxx_remove_one(struct pci_dev *pdev)
539 {
540         struct mem_ctl_info *mci;
541         struct e7xxx_pvt *pvt;
542
543         edac_dbg(0, "\n");
544
545         if (e7xxx_pci)
546                 edac_pci_release_generic_ctl(e7xxx_pci);
547
548         if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
549                 return;
550
551         pvt = (struct e7xxx_pvt *)mci->pvt_info;
552         pci_dev_put(pvt->bridge_ck);
553         edac_mc_free(mci);
554 }
555
556 static const struct pci_device_id e7xxx_pci_tbl[] = {
557         {
558          PCI_VEND_DEV(INTEL, 7205_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
559          E7205},
560         {
561          PCI_VEND_DEV(INTEL, 7500_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
562          E7500},
563         {
564          PCI_VEND_DEV(INTEL, 7501_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
565          E7501},
566         {
567          PCI_VEND_DEV(INTEL, 7505_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
568          E7505},
569         {
570          0,
571          }                      /* 0 terminated list. */
572 };
573
574 MODULE_DEVICE_TABLE(pci, e7xxx_pci_tbl);
575
576 static struct pci_driver e7xxx_driver = {
577         .name = EDAC_MOD_STR,
578         .probe = e7xxx_init_one,
579         .remove = e7xxx_remove_one,
580         .id_table = e7xxx_pci_tbl,
581 };
582
583 static int __init e7xxx_init(void)
584 {
585        /* Ensure that the OPSTATE is set correctly for POLL or NMI */
586        opstate_init();
587
588         return pci_register_driver(&e7xxx_driver);
589 }
590
591 static void __exit e7xxx_exit(void)
592 {
593         pci_unregister_driver(&e7xxx_driver);
594 }
595
596 module_init(e7xxx_init);
597 module_exit(e7xxx_exit);
598
599 MODULE_LICENSE("GPL");
600 MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n"
601                 "Based on.work by Dan Hollis et al");
602 MODULE_DESCRIPTION("MC support for Intel e7xxx memory controllers");
603 module_param(edac_op_state, int, 0444);
604 MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");