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24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27#include <linux/bitops.h>
28#include <linux/edac.h>
29#include <linux/pci_ids.h>
30#include <asm/io.h>
31
32#include "edac_core.h"
33#include "edac_module.h"
34#include "amd8111_edac.h"
35
36#define AMD8111_EDAC_REVISION " Ver: 1.0.0 " __DATE__
37#define AMD8111_EDAC_MOD_STR "amd8111_edac"
38
39#define PCI_DEVICE_ID_AMD_8111_PCI 0x7460
40
41enum amd8111_edac_devs {
42 LPC_BRIDGE = 0,
43};
44
45enum amd8111_edac_pcis {
46 PCI_BRIDGE = 0,
47};
48
49
50static int edac_pci_read_dword(struct pci_dev *dev, int reg, u32 *val32)
51{
52 int ret;
53
54 ret = pci_read_config_dword(dev, reg, val32);
55 if (ret != 0)
56 printk(KERN_ERR AMD8111_EDAC_MOD_STR
57 " PCI Access Read Error at 0x%x\n", reg);
58
59 return ret;
60}
61
62static void edac_pci_read_byte(struct pci_dev *dev, int reg, u8 *val8)
63{
64 int ret;
65
66 ret = pci_read_config_byte(dev, reg, val8);
67 if (ret != 0)
68 printk(KERN_ERR AMD8111_EDAC_MOD_STR
69 " PCI Access Read Error at 0x%x\n", reg);
70}
71
72static void edac_pci_write_dword(struct pci_dev *dev, int reg, u32 val32)
73{
74 int ret;
75
76 ret = pci_write_config_dword(dev, reg, val32);
77 if (ret != 0)
78 printk(KERN_ERR AMD8111_EDAC_MOD_STR
79 " PCI Access Write Error at 0x%x\n", reg);
80}
81
82static void edac_pci_write_byte(struct pci_dev *dev, int reg, u8 val8)
83{
84 int ret;
85
86 ret = pci_write_config_byte(dev, reg, val8);
87 if (ret != 0)
88 printk(KERN_ERR AMD8111_EDAC_MOD_STR
89 " PCI Access Write Error at 0x%x\n", reg);
90}
91
92
93
94
95
96
97
98static void amd8111_pci_bridge_init(struct amd8111_pci_info *pci_info)
99{
100 u32 val32;
101 struct pci_dev *dev = pci_info->dev;
102
103
104
105
106 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
107 if (val32 & PCI_STSCMD_CLEAR_MASK)
108 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
109
110
111 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
112 if (val32 & HT_LINK_CLEAR_MASK)
113 edac_pci_write_dword(dev, REG_HT_LINK, val32);
114
115
116
117
118 edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
119 if (val32 & MEM_LIMIT_CLEAR_MASK)
120 edac_pci_write_dword(dev, REG_MEM_LIM, val32);
121
122
123 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
124 if (val32 & PCI_INTBRG_CTRL_CLEAR_MASK)
125 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
126
127
128 if (edac_op_state == EDAC_OPSTATE_POLL) {
129
130 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
131 val32 |= PCI_STSCMD_SERREN;
132 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
133
134
135 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
136 val32 |= HT_LINK_CRCFEN;
137 edac_pci_write_dword(dev, REG_HT_LINK, val32);
138
139
140 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
141 val32 |= PCI_INTBRG_CTRL_POLL_MASK;
142 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
143 }
144}
145
146static void amd8111_pci_bridge_exit(struct amd8111_pci_info *pci_info)
147{
148 u32 val32;
149 struct pci_dev *dev = pci_info->dev;
150
151 if (edac_op_state == EDAC_OPSTATE_POLL) {
152
153 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
154 val32 &= ~PCI_STSCMD_SERREN;
155 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
156
157
158 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
159 val32 &= ~HT_LINK_CRCFEN;
160 edac_pci_write_dword(dev, REG_HT_LINK, val32);
161
162
163 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
164 val32 &= ~PCI_INTBRG_CTRL_POLL_MASK;
165 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
166 }
167}
168
169static void amd8111_pci_bridge_check(struct edac_pci_ctl_info *edac_dev)
170{
171 struct amd8111_pci_info *pci_info = edac_dev->pvt_info;
172 struct pci_dev *dev = pci_info->dev;
173 u32 val32;
174
175
176 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
177 if (val32 & PCI_STSCMD_CLEAR_MASK) {
178 printk(KERN_INFO "Error(s) in PCI bridge status and command"
179 "register on device %s\n", pci_info->ctl_name);
180 printk(KERN_INFO "SSE: %d, RMA: %d, RTA: %d\n",
181 (val32 & PCI_STSCMD_SSE) != 0,
182 (val32 & PCI_STSCMD_RMA) != 0,
183 (val32 & PCI_STSCMD_RTA) != 0);
184
185 val32 |= PCI_STSCMD_CLEAR_MASK;
186 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
187
188 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
189 }
190
191
192 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
193 if (val32 & HT_LINK_LKFAIL) {
194 printk(KERN_INFO "Error(s) in hypertransport link control"
195 "register on device %s\n", pci_info->ctl_name);
196 printk(KERN_INFO "LKFAIL: %d\n",
197 (val32 & HT_LINK_LKFAIL) != 0);
198
199 val32 |= HT_LINK_LKFAIL;
200 edac_pci_write_dword(dev, REG_HT_LINK, val32);
201
202 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
203 }
204
205
206 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
207 if (val32 & PCI_INTBRG_CTRL_DTSTAT) {
208 printk(KERN_INFO "Error(s) in PCI interrupt and bridge control"
209 "register on device %s\n", pci_info->ctl_name);
210 printk(KERN_INFO "DTSTAT: %d\n",
211 (val32 & PCI_INTBRG_CTRL_DTSTAT) != 0);
212
213 val32 |= PCI_INTBRG_CTRL_DTSTAT;
214 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
215
216 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
217 }
218
219
220 edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
221 if (val32 & MEM_LIMIT_CLEAR_MASK) {
222 printk(KERN_INFO
223 "Error(s) in mem limit register on %s device\n",
224 pci_info->ctl_name);
225 printk(KERN_INFO "DPE: %d, RSE: %d, RMA: %d\n"
226 "RTA: %d, STA: %d, MDPE: %d\n",
227 (val32 & MEM_LIMIT_DPE) != 0,
228 (val32 & MEM_LIMIT_RSE) != 0,
229 (val32 & MEM_LIMIT_RMA) != 0,
230 (val32 & MEM_LIMIT_RTA) != 0,
231 (val32 & MEM_LIMIT_STA) != 0,
232 (val32 & MEM_LIMIT_MDPE) != 0);
233
234 val32 |= MEM_LIMIT_CLEAR_MASK;
235 edac_pci_write_dword(dev, REG_MEM_LIM, val32);
236
237 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
238 }
239}
240
241static struct resource *legacy_io_res;
242static int at_compat_reg_broken;
243#define LEGACY_NR_PORTS 1
244
245
246static void amd8111_lpc_bridge_init(struct amd8111_dev_info *dev_info)
247{
248 u8 val8;
249 struct pci_dev *dev = dev_info->dev;
250
251
252 legacy_io_res = request_region(REG_AT_COMPAT, LEGACY_NR_PORTS,
253 AMD8111_EDAC_MOD_STR);
254 if (!legacy_io_res)
255 printk(KERN_INFO "%s: failed to request legacy I/O region "
256 "start %d, len %d\n", __func__,
257 REG_AT_COMPAT, LEGACY_NR_PORTS);
258 else {
259 val8 = __do_inb(REG_AT_COMPAT);
260 if (val8 == 0xff) {
261 printk(KERN_INFO "%s: port %d is buggy, not supported"
262 " by hardware?\n", __func__, REG_AT_COMPAT);
263 at_compat_reg_broken = 1;
264 release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
265 legacy_io_res = NULL;
266 } else {
267 u8 out8 = 0;
268 if (val8 & AT_COMPAT_SERR)
269 out8 = AT_COMPAT_CLRSERR;
270 if (val8 & AT_COMPAT_IOCHK)
271 out8 |= AT_COMPAT_CLRIOCHK;
272 if (out8 > 0)
273 __do_outb(out8, REG_AT_COMPAT);
274 }
275 }
276
277
278 edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
279 if (val8 & IO_CTRL_1_CLEAR_MASK)
280 edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
281}
282
283static void amd8111_lpc_bridge_exit(struct amd8111_dev_info *dev_info)
284{
285 if (legacy_io_res)
286 release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
287}
288
289static void amd8111_lpc_bridge_check(struct edac_device_ctl_info *edac_dev)
290{
291 struct amd8111_dev_info *dev_info = edac_dev->pvt_info;
292 struct pci_dev *dev = dev_info->dev;
293 u8 val8;
294
295 edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
296 if (val8 & IO_CTRL_1_CLEAR_MASK) {
297 printk(KERN_INFO
298 "Error(s) in IO control register on %s device\n",
299 dev_info->ctl_name);
300 printk(KERN_INFO "LPC ERR: %d, PW2LPC: %d\n",
301 (val8 & IO_CTRL_1_LPC_ERR) != 0,
302 (val8 & IO_CTRL_1_PW2LPC) != 0);
303
304 val8 |= IO_CTRL_1_CLEAR_MASK;
305 edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
306
307 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
308 }
309
310 if (at_compat_reg_broken == 0) {
311 u8 out8 = 0;
312 val8 = __do_inb(REG_AT_COMPAT);
313 if (val8 & AT_COMPAT_SERR)
314 out8 = AT_COMPAT_CLRSERR;
315 if (val8 & AT_COMPAT_IOCHK)
316 out8 |= AT_COMPAT_CLRIOCHK;
317 if (out8 > 0) {
318 __do_outb(out8, REG_AT_COMPAT);
319 edac_device_handle_ue(edac_dev, 0, 0,
320 edac_dev->ctl_name);
321 }
322 }
323}
324
325
326static struct amd8111_dev_info amd8111_devices[] = {
327 [LPC_BRIDGE] = {
328 .err_dev = PCI_DEVICE_ID_AMD_8111_LPC,
329 .ctl_name = "lpc",
330 .init = amd8111_lpc_bridge_init,
331 .exit = amd8111_lpc_bridge_exit,
332 .check = amd8111_lpc_bridge_check,
333 },
334 {0},
335};
336
337
338static struct amd8111_pci_info amd8111_pcis[] = {
339 [PCI_BRIDGE] = {
340 .err_dev = PCI_DEVICE_ID_AMD_8111_PCI,
341 .ctl_name = "AMD8111_PCI_Controller",
342 .init = amd8111_pci_bridge_init,
343 .exit = amd8111_pci_bridge_exit,
344 .check = amd8111_pci_bridge_check,
345 },
346 {0},
347};
348
349static int amd8111_dev_probe(struct pci_dev *dev,
350 const struct pci_device_id *id)
351{
352 struct amd8111_dev_info *dev_info = &amd8111_devices[id->driver_data];
353
354 dev_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
355 dev_info->err_dev, NULL);
356
357 if (!dev_info->dev) {
358 printk(KERN_ERR "EDAC device not found:"
359 "vendor %x, device %x, name %s\n",
360 PCI_VENDOR_ID_AMD, dev_info->err_dev,
361 dev_info->ctl_name);
362 return -ENODEV;
363 }
364
365 if (pci_enable_device(dev_info->dev)) {
366 pci_dev_put(dev_info->dev);
367 printk(KERN_ERR "failed to enable:"
368 "vendor %x, device %x, name %s\n",
369 PCI_VENDOR_ID_AMD, dev_info->err_dev,
370 dev_info->ctl_name);
371 return -ENODEV;
372 }
373
374
375
376
377
378
379 dev_info->edac_idx = edac_device_alloc_index();
380 dev_info->edac_dev =
381 edac_device_alloc_ctl_info(0, dev_info->ctl_name, 1,
382 NULL, 0, 0,
383 NULL, 0, dev_info->edac_idx);
384 if (!dev_info->edac_dev)
385 return -ENOMEM;
386
387 dev_info->edac_dev->pvt_info = dev_info;
388 dev_info->edac_dev->dev = &dev_info->dev->dev;
389 dev_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
390 dev_info->edac_dev->ctl_name = dev_info->ctl_name;
391 dev_info->edac_dev->dev_name = dev_name(&dev_info->dev->dev);
392
393 if (edac_op_state == EDAC_OPSTATE_POLL)
394 dev_info->edac_dev->edac_check = dev_info->check;
395
396 if (dev_info->init)
397 dev_info->init(dev_info);
398
399 if (edac_device_add_device(dev_info->edac_dev) > 0) {
400 printk(KERN_ERR "failed to add edac_dev for %s\n",
401 dev_info->ctl_name);
402 edac_device_free_ctl_info(dev_info->edac_dev);
403 return -ENODEV;
404 }
405
406 printk(KERN_INFO "added one edac_dev on AMD8111 "
407 "vendor %x, device %x, name %s\n",
408 PCI_VENDOR_ID_AMD, dev_info->err_dev,
409 dev_info->ctl_name);
410
411 return 0;
412}
413
414static void amd8111_dev_remove(struct pci_dev *dev)
415{
416 struct amd8111_dev_info *dev_info;
417
418 for (dev_info = amd8111_devices; dev_info->err_dev; dev_info++)
419 if (dev_info->dev->device == dev->device)
420 break;
421
422 if (!dev_info->err_dev)
423 return;
424
425 if (dev_info->edac_dev) {
426 edac_device_del_device(dev_info->edac_dev->dev);
427 edac_device_free_ctl_info(dev_info->edac_dev);
428 }
429
430 if (dev_info->exit)
431 dev_info->exit(dev_info);
432
433 pci_dev_put(dev_info->dev);
434}
435
436static int amd8111_pci_probe(struct pci_dev *dev,
437 const struct pci_device_id *id)
438{
439 struct amd8111_pci_info *pci_info = &amd8111_pcis[id->driver_data];
440
441 pci_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
442 pci_info->err_dev, NULL);
443
444 if (!pci_info->dev) {
445 printk(KERN_ERR "EDAC device not found:"
446 "vendor %x, device %x, name %s\n",
447 PCI_VENDOR_ID_AMD, pci_info->err_dev,
448 pci_info->ctl_name);
449 return -ENODEV;
450 }
451
452 if (pci_enable_device(pci_info->dev)) {
453 pci_dev_put(pci_info->dev);
454 printk(KERN_ERR "failed to enable:"
455 "vendor %x, device %x, name %s\n",
456 PCI_VENDOR_ID_AMD, pci_info->err_dev,
457 pci_info->ctl_name);
458 return -ENODEV;
459 }
460
461
462
463
464
465
466 pci_info->edac_idx = edac_pci_alloc_index();
467 pci_info->edac_dev = edac_pci_alloc_ctl_info(0, pci_info->ctl_name);
468 if (!pci_info->edac_dev)
469 return -ENOMEM;
470
471 pci_info->edac_dev->pvt_info = pci_info;
472 pci_info->edac_dev->dev = &pci_info->dev->dev;
473 pci_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
474 pci_info->edac_dev->ctl_name = pci_info->ctl_name;
475 pci_info->edac_dev->dev_name = dev_name(&pci_info->dev->dev);
476
477 if (edac_op_state == EDAC_OPSTATE_POLL)
478 pci_info->edac_dev->edac_check = pci_info->check;
479
480 if (pci_info->init)
481 pci_info->init(pci_info);
482
483 if (edac_pci_add_device(pci_info->edac_dev, pci_info->edac_idx) > 0) {
484 printk(KERN_ERR "failed to add edac_pci for %s\n",
485 pci_info->ctl_name);
486 edac_pci_free_ctl_info(pci_info->edac_dev);
487 return -ENODEV;
488 }
489
490 printk(KERN_INFO "added one edac_pci on AMD8111 "
491 "vendor %x, device %x, name %s\n",
492 PCI_VENDOR_ID_AMD, pci_info->err_dev,
493 pci_info->ctl_name);
494
495 return 0;
496}
497
498static void amd8111_pci_remove(struct pci_dev *dev)
499{
500 struct amd8111_pci_info *pci_info;
501
502 for (pci_info = amd8111_pcis; pci_info->err_dev; pci_info++)
503 if (pci_info->dev->device == dev->device)
504 break;
505
506 if (!pci_info->err_dev)
507 return;
508
509 if (pci_info->edac_dev) {
510 edac_pci_del_device(pci_info->edac_dev->dev);
511 edac_pci_free_ctl_info(pci_info->edac_dev);
512 }
513
514 if (pci_info->exit)
515 pci_info->exit(pci_info);
516
517 pci_dev_put(pci_info->dev);
518}
519
520
521static const struct pci_device_id amd8111_edac_dev_tbl[] = {
522 {
523 PCI_VEND_DEV(AMD, 8111_LPC),
524 .subvendor = PCI_ANY_ID,
525 .subdevice = PCI_ANY_ID,
526 .class = 0,
527 .class_mask = 0,
528 .driver_data = LPC_BRIDGE,
529 },
530 {
531 0,
532 }
533};
534MODULE_DEVICE_TABLE(pci, amd8111_edac_dev_tbl);
535
536static struct pci_driver amd8111_edac_dev_driver = {
537 .name = "AMD8111_EDAC_DEV",
538 .probe = amd8111_dev_probe,
539 .remove = amd8111_dev_remove,
540 .id_table = amd8111_edac_dev_tbl,
541};
542
543
544static const struct pci_device_id amd8111_edac_pci_tbl[] = {
545 {
546 PCI_VEND_DEV(AMD, 8111_PCI),
547 .subvendor = PCI_ANY_ID,
548 .subdevice = PCI_ANY_ID,
549 .class = 0,
550 .class_mask = 0,
551 .driver_data = PCI_BRIDGE,
552 },
553 {
554 0,
555 }
556};
557MODULE_DEVICE_TABLE(pci, amd8111_edac_pci_tbl);
558
559static struct pci_driver amd8111_edac_pci_driver = {
560 .name = "AMD8111_EDAC_PCI",
561 .probe = amd8111_pci_probe,
562 .remove = amd8111_pci_remove,
563 .id_table = amd8111_edac_pci_tbl,
564};
565
566static int __init amd8111_edac_init(void)
567{
568 int val;
569
570 printk(KERN_INFO "AMD8111 EDAC driver " AMD8111_EDAC_REVISION "\n");
571 printk(KERN_INFO "\t(c) 2008 Wind River Systems, Inc.\n");
572
573
574 edac_op_state = EDAC_OPSTATE_POLL;
575
576 val = pci_register_driver(&amd8111_edac_dev_driver);
577 val |= pci_register_driver(&amd8111_edac_pci_driver);
578
579 return val;
580}
581
582static void __exit amd8111_edac_exit(void)
583{
584 pci_unregister_driver(&amd8111_edac_pci_driver);
585 pci_unregister_driver(&amd8111_edac_dev_driver);
586}
587
588
589module_init(amd8111_edac_init);
590module_exit(amd8111_edac_exit);
591
592MODULE_LICENSE("GPL");
593MODULE_AUTHOR("Cao Qingtao <qingtao.cao@windriver.com>\n");
594MODULE_DESCRIPTION("AMD8111 HyperTransport I/O Hub EDAC kernel module");
595
