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Linux 2.6.28-rc7
[linux-2.6/zen-sources.git] / drivers / edac / mpc85xx_edac.c
blob0cfcb2d075a0620228092f741970b525702319a7
1 /*
2 * Freescale MPC85xx Memory Controller kenel module
3 *
4 * Author: Dave Jiang <djiang@mvista.com>
5 *
6 * 2006-2007 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 *
11 */
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/ctype.h>
17 #include <linux/io.h>
18 #include <linux/mod_devicetable.h>
19 #include <linux/edac.h>
20 #include <linux/smp.h>
21
22 #include <linux/of_platform.h>
23 #include <linux/of_device.h>
24 #include "edac_module.h"
25 #include "edac_core.h"
26 #include "mpc85xx_edac.h"
27
28 static int edac_dev_idx;
29 static int edac_pci_idx;
30 static int edac_mc_idx;
31
32 static u32 orig_ddr_err_disable;
33 static u32 orig_ddr_err_sbe;
34
35 /*
36 * PCI Err defines
37 */
38 #ifdef CONFIG_PCI
39 static u32 orig_pci_err_cap_dr;
40 static u32 orig_pci_err_en;
41 #endif
42
43 static u32 orig_l2_err_disable;
44 static u32 orig_hid1[2];
45
46 /************************ MC SYSFS parts ***********************************/
47
48 static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
49 char *data)
50 {
51 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
52 return sprintf(data, "0x%08x",
53 in_be32(pdata->mc_vbase +
54 MPC85XX_MC_DATA_ERR_INJECT_HI));
55 }
56
57 static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
58 char *data)
59 {
60 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
61 return sprintf(data, "0x%08x",
62 in_be32(pdata->mc_vbase +
63 MPC85XX_MC_DATA_ERR_INJECT_LO));
64 }
65
66 static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
67 {
68 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
69 return sprintf(data, "0x%08x",
70 in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
71 }
72
73 static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
74 const char *data, size_t count)
75 {
76 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
77 if (isdigit(*data)) {
78 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
79 simple_strtoul(data, NULL, 0));
80 return count;
81 }
82 return 0;
83 }
84
85 static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
86 const char *data, size_t count)
87 {
88 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
89 if (isdigit(*data)) {
90 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
91 simple_strtoul(data, NULL, 0));
92 return count;
93 }
94 return 0;
95 }
96
97 static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
98 const char *data, size_t count)
99 {
100 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
101 if (isdigit(*data)) {
102 out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
103 simple_strtoul(data, NULL, 0));
104 return count;
105 }
106 return 0;
107 }
108
109 static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
110 {
111 .attr = {
112 .name = "inject_data_hi",
113 .mode = (S_IRUGO | S_IWUSR)
114 },
115 .show = mpc85xx_mc_inject_data_hi_show,
116 .store = mpc85xx_mc_inject_data_hi_store},
117 {
118 .attr = {
119 .name = "inject_data_lo",
120 .mode = (S_IRUGO | S_IWUSR)
121 },
122 .show = mpc85xx_mc_inject_data_lo_show,
123 .store = mpc85xx_mc_inject_data_lo_store},
124 {
125 .attr = {
126 .name = "inject_ctrl",
127 .mode = (S_IRUGO | S_IWUSR)
128 },
129 .show = mpc85xx_mc_inject_ctrl_show,
130 .store = mpc85xx_mc_inject_ctrl_store},
131
132 /* End of list */
133 {
134 .attr = {.name = NULL}
135 }
136 };
137
138 static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
139 {
140 mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
141 }
142
143 /**************************** PCI Err device ***************************/
144 #ifdef CONFIG_PCI
145
146 static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
147 {
148 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
149 u32 err_detect;
150
151 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
152
153 /* master aborts can happen during PCI config cycles */
154 if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
155 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
156 return;
157 }
158
159 printk(KERN_ERR "PCI error(s) detected\n");
160 printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
161
162 printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
163 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
164 printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
165 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
166 printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
167 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
168 printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
169 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
170 printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
171 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
172
173 /* clear error bits */
174 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
175
176 if (err_detect & PCI_EDE_PERR_MASK)
177 edac_pci_handle_pe(pci, pci->ctl_name);
178
179 if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
180 edac_pci_handle_npe(pci, pci->ctl_name);
181 }
182
183 static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
184 {
185 struct edac_pci_ctl_info *pci = dev_id;
186 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
187 u32 err_detect;
188
189 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
190
191 if (!err_detect)
192 return IRQ_NONE;
193
194 mpc85xx_pci_check(pci);
195
196 return IRQ_HANDLED;
197 }
198
199 static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
200 const struct of_device_id *match)
201 {
202 struct edac_pci_ctl_info *pci;
203 struct mpc85xx_pci_pdata *pdata;
204 struct resource r;
205 int res = 0;
206
207 if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
208 return -ENOMEM;
209
210 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
211 if (!pci)
212 return -ENOMEM;
213
214 pdata = pci->pvt_info;
215 pdata->name = "mpc85xx_pci_err";
216 pdata->irq = NO_IRQ;
217 dev_set_drvdata(&op->dev, pci);
218 pci->dev = &op->dev;
219 pci->mod_name = EDAC_MOD_STR;
220 pci->ctl_name = pdata->name;
221 pci->dev_name = op->dev.bus_id;
222
223 if (edac_op_state == EDAC_OPSTATE_POLL)
224 pci->edac_check = mpc85xx_pci_check;
225
226 pdata->edac_idx = edac_pci_idx++;
227
228 res = of_address_to_resource(op->node, 0, &r);
229 if (res) {
230 printk(KERN_ERR "%s: Unable to get resource for "
231 "PCI err regs\n", __func__);
232 goto err;
233 }
234
235 /* we only need the error registers */
236 r.start += 0xe00;
237
238 if (!devm_request_mem_region(&op->dev, r.start,
239 r.end - r.start + 1, pdata->name)) {
240 printk(KERN_ERR "%s: Error while requesting mem region\n",
241 __func__);
242 res = -EBUSY;
243 goto err;
244 }
245
246 pdata->pci_vbase = devm_ioremap(&op->dev, r.start,
247 r.end - r.start + 1);
248 if (!pdata->pci_vbase) {
249 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
250 res = -ENOMEM;
251 goto err;
252 }
253
254 orig_pci_err_cap_dr =
255 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
256
257 /* PCI master abort is expected during config cycles */
258 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
259
260 orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
261
262 /* disable master abort reporting */
263 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
264
265 /* clear error bits */
266 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
267
268 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
269 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
270 goto err;
271 }
272
273 if (edac_op_state == EDAC_OPSTATE_INT) {
274 pdata->irq = irq_of_parse_and_map(op->node, 0);
275 res = devm_request_irq(&op->dev, pdata->irq,
276 mpc85xx_pci_isr, IRQF_DISABLED,
277 "[EDAC] PCI err", pci);
278 if (res < 0) {
279 printk(KERN_ERR
280 "%s: Unable to requiest irq %d for "
281 "MPC85xx PCI err\n", __func__, pdata->irq);
282 irq_dispose_mapping(pdata->irq);
283 res = -ENODEV;
284 goto err2;
285 }
286
287 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
288 pdata->irq);
289 }
290
291 devres_remove_group(&op->dev, mpc85xx_pci_err_probe);
292 debugf3("%s(): success\n", __func__);
293 printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
294
295 return 0;
296
297 err2:
298 edac_pci_del_device(&op->dev);
299 err:
300 edac_pci_free_ctl_info(pci);
301 devres_release_group(&op->dev, mpc85xx_pci_err_probe);
302 return res;
303 }
304
305 static int mpc85xx_pci_err_remove(struct of_device *op)
306 {
307 struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
308 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
309
310 debugf0("%s()\n", __func__);
311
312 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
313 orig_pci_err_cap_dr);
314
315 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
316
317 edac_pci_del_device(pci->dev);
318
319 if (edac_op_state == EDAC_OPSTATE_INT)
320 irq_dispose_mapping(pdata->irq);
321
322 edac_pci_free_ctl_info(pci);
323
324 return 0;
325 }
326
327 static struct of_device_id mpc85xx_pci_err_of_match[] = {
328 {
329 .compatible = "fsl,mpc8540-pcix",
330 },
331 {
332 .compatible = "fsl,mpc8540-pci",
333 },
334 {},
335 };
336
337 static struct of_platform_driver mpc85xx_pci_err_driver = {
338 .owner = THIS_MODULE,
339 .name = "mpc85xx_pci_err",
340 .match_table = mpc85xx_pci_err_of_match,
341 .probe = mpc85xx_pci_err_probe,
342 .remove = __devexit_p(mpc85xx_pci_err_remove),
343 .driver = {
344 .name = "mpc85xx_pci_err",
345 .owner = THIS_MODULE,
346 },
347 };
348
349 #endif /* CONFIG_PCI */
350
351 /**************************** L2 Err device ***************************/
352
353 /************************ L2 SYSFS parts ***********************************/
354
355 static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
356 *edac_dev, char *data)
357 {
358 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
359 return sprintf(data, "0x%08x",
360 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
361 }
362
363 static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
364 *edac_dev, char *data)
365 {
366 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
367 return sprintf(data, "0x%08x",
368 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
369 }
370
371 static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
372 *edac_dev, char *data)
373 {
374 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
375 return sprintf(data, "0x%08x",
376 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
377 }
378
379 static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
380 *edac_dev, const char *data,
381 size_t count)
382 {
383 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
384 if (isdigit(*data)) {
385 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
386 simple_strtoul(data, NULL, 0));
387 return count;
388 }
389 return 0;
390 }
391
392 static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
393 *edac_dev, const char *data,
394 size_t count)
395 {
396 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
397 if (isdigit(*data)) {
398 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
399 simple_strtoul(data, NULL, 0));
400 return count;
401 }
402 return 0;
403 }
404
405 static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
406 *edac_dev, const char *data,
407 size_t count)
408 {
409 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
410 if (isdigit(*data)) {
411 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
412 simple_strtoul(data, NULL, 0));
413 return count;
414 }
415 return 0;
416 }
417
418 static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
419 {
420 .attr = {
421 .name = "inject_data_hi",
422 .mode = (S_IRUGO | S_IWUSR)
423 },
424 .show = mpc85xx_l2_inject_data_hi_show,
425 .store = mpc85xx_l2_inject_data_hi_store},
426 {
427 .attr = {
428 .name = "inject_data_lo",
429 .mode = (S_IRUGO | S_IWUSR)
430 },
431 .show = mpc85xx_l2_inject_data_lo_show,
432 .store = mpc85xx_l2_inject_data_lo_store},
433 {
434 .attr = {
435 .name = "inject_ctrl",
436 .mode = (S_IRUGO | S_IWUSR)
437 },
438 .show = mpc85xx_l2_inject_ctrl_show,
439 .store = mpc85xx_l2_inject_ctrl_store},
440
441 /* End of list */
442 {
443 .attr = {.name = NULL}
444 }
445 };
446
447 static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
448 *edac_dev)
449 {
450 edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
451 }
452
453 /***************************** L2 ops ***********************************/
454
455 static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
456 {
457 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
458 u32 err_detect;
459
460 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
461
462 if (!(err_detect & L2_EDE_MASK))
463 return;
464
465 printk(KERN_ERR "ECC Error in CPU L2 cache\n");
466 printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
467 printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
468 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
469 printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
470 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
471 printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
472 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
473 printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
474 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
475 printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
476 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
477
478 /* clear error detect register */
479 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
480
481 if (err_detect & L2_EDE_CE_MASK)
482 edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
483
484 if (err_detect & L2_EDE_UE_MASK)
485 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
486 }
487
488 static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
489 {
490 struct edac_device_ctl_info *edac_dev = dev_id;
491 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
492 u32 err_detect;
493
494 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
495
496 if (!(err_detect & L2_EDE_MASK))
497 return IRQ_NONE;
498
499 mpc85xx_l2_check(edac_dev);
500
501 return IRQ_HANDLED;
502 }
503
504 static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
505 const struct of_device_id *match)
506 {
507 struct edac_device_ctl_info *edac_dev;
508 struct mpc85xx_l2_pdata *pdata;
509 struct resource r;
510 int res;
511
512 if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
513 return -ENOMEM;
514
515 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
516 "cpu", 1, "L", 1, 2, NULL, 0,
517 edac_dev_idx);
518 if (!edac_dev) {
519 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
520 return -ENOMEM;
521 }
522
523 pdata = edac_dev->pvt_info;
524 pdata->name = "mpc85xx_l2_err";
525 pdata->irq = NO_IRQ;
526 edac_dev->dev = &op->dev;
527 dev_set_drvdata(edac_dev->dev, edac_dev);
528 edac_dev->ctl_name = pdata->name;
529 edac_dev->dev_name = pdata->name;
530
531 res = of_address_to_resource(op->node, 0, &r);
532 if (res) {
533 printk(KERN_ERR "%s: Unable to get resource for "
534 "L2 err regs\n", __func__);
535 goto err;
536 }
537
538 /* we only need the error registers */
539 r.start += 0xe00;
540
541 if (!devm_request_mem_region(&op->dev, r.start,
542 r.end - r.start + 1, pdata->name)) {
543 printk(KERN_ERR "%s: Error while requesting mem region\n",
544 __func__);
545 res = -EBUSY;
546 goto err;
547 }
548
549 pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
550 if (!pdata->l2_vbase) {
551 printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
552 res = -ENOMEM;
553 goto err;
554 }
555
556 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
557
558 orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
559
560 /* clear the err_dis */
561 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
562
563 edac_dev->mod_name = EDAC_MOD_STR;
564
565 if (edac_op_state == EDAC_OPSTATE_POLL)
566 edac_dev->edac_check = mpc85xx_l2_check;
567
568 mpc85xx_set_l2_sysfs_attributes(edac_dev);
569
570 pdata->edac_idx = edac_dev_idx++;
571
572 if (edac_device_add_device(edac_dev) > 0) {
573 debugf3("%s(): failed edac_device_add_device()\n", __func__);
574 goto err;
575 }
576
577 if (edac_op_state == EDAC_OPSTATE_INT) {
578 pdata->irq = irq_of_parse_and_map(op->node, 0);
579 res = devm_request_irq(&op->dev, pdata->irq,
580 mpc85xx_l2_isr, IRQF_DISABLED,
581 "[EDAC] L2 err", edac_dev);
582 if (res < 0) {
583 printk(KERN_ERR
584 "%s: Unable to requiest irq %d for "
585 "MPC85xx L2 err\n", __func__, pdata->irq);
586 irq_dispose_mapping(pdata->irq);
587 res = -ENODEV;
588 goto err2;
589 }
590
591 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
592 pdata->irq);
593
594 edac_dev->op_state = OP_RUNNING_INTERRUPT;
595
596 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
597 }
598
599 devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
600
601 debugf3("%s(): success\n", __func__);
602 printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
603
604 return 0;
605
606 err2:
607 edac_device_del_device(&op->dev);
608 err:
609 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
610 edac_device_free_ctl_info(edac_dev);
611 return res;
612 }
613
614 static int mpc85xx_l2_err_remove(struct of_device *op)
615 {
616 struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
617 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
618
619 debugf0("%s()\n", __func__);
620
621 if (edac_op_state == EDAC_OPSTATE_INT) {
622 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
623 irq_dispose_mapping(pdata->irq);
624 }
625
626 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
627 edac_device_del_device(&op->dev);
628 edac_device_free_ctl_info(edac_dev);
629 return 0;
630 }
631
632 static struct of_device_id mpc85xx_l2_err_of_match[] = {
633 {
634 .compatible = "fsl,8540-l2-cache-controller",
635 },
636 {
637 .compatible = "fsl,8541-l2-cache-controller",
638 },
639 {
640 .compatible = "fsl,8544-l2-cache-controller",
641 },
642 {
643 .compatible = "fsl,8548-l2-cache-controller",
644 },
645 {
646 .compatible = "fsl,8555-l2-cache-controller",
647 },
648 {
649 .compatible = "fsl,8568-l2-cache-controller",
650 },
651 {
652 .compatible = "fsl,mpc8572-l2-cache-controller",
653 },
654 {},
655 };
656
657 static struct of_platform_driver mpc85xx_l2_err_driver = {
658 .owner = THIS_MODULE,
659 .name = "mpc85xx_l2_err",
660 .match_table = mpc85xx_l2_err_of_match,
661 .probe = mpc85xx_l2_err_probe,
662 .remove = mpc85xx_l2_err_remove,
663 .driver = {
664 .name = "mpc85xx_l2_err",
665 .owner = THIS_MODULE,
666 },
667 };
668
669 /**************************** MC Err device ***************************/
670
671 static void mpc85xx_mc_check(struct mem_ctl_info *mci)
672 {
673 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
674 struct csrow_info *csrow;
675 u32 err_detect;
676 u32 syndrome;
677 u32 err_addr;
678 u32 pfn;
679 int row_index;
680
681 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
682 if (err_detect)
683 return;
684
685 mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n",
686 err_detect);
687
688 /* no more processing if not ECC bit errors */
689 if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
690 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
691 return;
692 }
693
694 syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC);
695 err_addr = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS);
696 pfn = err_addr >> PAGE_SHIFT;
697
698 for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
699 csrow = &mci->csrows[row_index];
700 if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page))
701 break;
702 }
703
704 mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data High: %#8.8x\n",
705 in_be32(pdata->mc_vbase +
706 MPC85XX_MC_CAPTURE_DATA_HI));
707 mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data Low: %#8.8x\n",
708 in_be32(pdata->mc_vbase +
709 MPC85XX_MC_CAPTURE_DATA_LO));
710 mpc85xx_mc_printk(mci, KERN_ERR, "syndrome: %#8.8x\n", syndrome);
711 mpc85xx_mc_printk(mci, KERN_ERR, "err addr: %#8.8x\n", err_addr);
712 mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn);
713
714 /* we are out of range */
715 if (row_index == mci->nr_csrows)
716 mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n");
717
718 if (err_detect & DDR_EDE_SBE)
719 edac_mc_handle_ce(mci, pfn, err_addr & PAGE_MASK,
720 syndrome, row_index, 0, mci->ctl_name);
721
722 if (err_detect & DDR_EDE_MBE)
723 edac_mc_handle_ue(mci, pfn, err_addr & PAGE_MASK,
724 row_index, mci->ctl_name);
725
726 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
727 }
728
729 static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id)
730 {
731 struct mem_ctl_info *mci = dev_id;
732 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
733 u32 err_detect;
734
735 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
736 if (!err_detect)
737 return IRQ_NONE;
738
739 mpc85xx_mc_check(mci);
740
741 return IRQ_HANDLED;
742 }
743
744 static void __devinit mpc85xx_init_csrows(struct mem_ctl_info *mci)
745 {
746 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
747 struct csrow_info *csrow;
748 u32 sdram_ctl;
749 u32 sdtype;
750 enum mem_type mtype;
751 u32 cs_bnds;
752 int index;
753
754 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
755
756 sdtype = sdram_ctl & DSC_SDTYPE_MASK;
757 if (sdram_ctl & DSC_RD_EN) {
758 switch (sdtype) {
759 case DSC_SDTYPE_DDR:
760 mtype = MEM_RDDR;
761 break;
762 case DSC_SDTYPE_DDR2:
763 mtype = MEM_RDDR2;
764 break;
765 default:
766 mtype = MEM_UNKNOWN;
767 break;
768 }
769 } else {
770 switch (sdtype) {
771 case DSC_SDTYPE_DDR:
772 mtype = MEM_DDR;
773 break;
774 case DSC_SDTYPE_DDR2:
775 mtype = MEM_DDR2;
776 break;
777 default:
778 mtype = MEM_UNKNOWN;
779 break;
780 }
781 }
782
783 for (index = 0; index < mci->nr_csrows; index++) {
784 u32 start;
785 u32 end;
786
787 csrow = &mci->csrows[index];
788 cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
789 (index * MPC85XX_MC_CS_BNDS_OFS));
790 start = (cs_bnds & 0xfff0000) << 4;
791 end = ((cs_bnds & 0xfff) << 20);
792 if (start)
793 start |= 0xfffff;
794 if (end)
795 end |= 0xfffff;
796
797 if (start == end)
798 continue; /* not populated */
799
800 csrow->first_page = start >> PAGE_SHIFT;
801 csrow->last_page = end >> PAGE_SHIFT;
802 csrow->nr_pages = csrow->last_page + 1 - csrow->first_page;
803 csrow->grain = 8;
804 csrow->mtype = mtype;
805 csrow->dtype = DEV_UNKNOWN;
806 if (sdram_ctl & DSC_X32_EN)
807 csrow->dtype = DEV_X32;
808 csrow->edac_mode = EDAC_SECDED;
809 }
810 }
811
812 static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
813 const struct of_device_id *match)
814 {
815 struct mem_ctl_info *mci;
816 struct mpc85xx_mc_pdata *pdata;
817 struct resource r;
818 u32 sdram_ctl;
819 int res;
820
821 if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
822 return -ENOMEM;
823
824 mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
825 if (!mci) {
826 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
827 return -ENOMEM;
828 }
829
830 pdata = mci->pvt_info;
831 pdata->name = "mpc85xx_mc_err";
832 pdata->irq = NO_IRQ;
833 mci->dev = &op->dev;
834 pdata->edac_idx = edac_mc_idx++;
835 dev_set_drvdata(mci->dev, mci);
836 mci->ctl_name = pdata->name;
837 mci->dev_name = pdata->name;
838
839 res = of_address_to_resource(op->node, 0, &r);
840 if (res) {
841 printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
842 __func__);
843 goto err;
844 }
845
846 if (!devm_request_mem_region(&op->dev, r.start,
847 r.end - r.start + 1, pdata->name)) {
848 printk(KERN_ERR "%s: Error while requesting mem region\n",
849 __func__);
850 res = -EBUSY;
851 goto err;
852 }
853
854 pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
855 if (!pdata->mc_vbase) {
856 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
857 res = -ENOMEM;
858 goto err;
859 }
860
861 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
862 if (!(sdram_ctl & DSC_ECC_EN)) {
863 /* no ECC */
864 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
865 res = -ENODEV;
866 goto err;
867 }
868
869 debugf3("%s(): init mci\n", __func__);
870 mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
871 MEM_FLAG_DDR | MEM_FLAG_DDR2;
872 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
873 mci->edac_cap = EDAC_FLAG_SECDED;
874 mci->mod_name = EDAC_MOD_STR;
875 mci->mod_ver = MPC85XX_REVISION;
876
877 if (edac_op_state == EDAC_OPSTATE_POLL)
878 mci->edac_check = mpc85xx_mc_check;
879
880 mci->ctl_page_to_phys = NULL;
881
882 mci->scrub_mode = SCRUB_SW_SRC;
883
884 mpc85xx_set_mc_sysfs_attributes(mci);
885
886 mpc85xx_init_csrows(mci);
887
888 #ifdef CONFIG_EDAC_DEBUG
889 edac_mc_register_mcidev_debug((struct attribute **)debug_attr);
890 #endif
891
892 /* store the original error disable bits */
893 orig_ddr_err_disable =
894 in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
895 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
896
897 /* clear all error bits */
898 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
899
900 if (edac_mc_add_mc(mci)) {
901 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
902 goto err;
903 }
904
905 if (edac_op_state == EDAC_OPSTATE_INT) {
906 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
907 DDR_EIE_MBEE | DDR_EIE_SBEE);
908
909 /* store the original error management threshold */
910 orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
911 MPC85XX_MC_ERR_SBE) & 0xff0000;
912
913 /* set threshold to 1 error per interrupt */
914 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
915
916 /* register interrupts */
917 pdata->irq = irq_of_parse_and_map(op->node, 0);
918 res = devm_request_irq(&op->dev, pdata->irq,
919 mpc85xx_mc_isr,
920 IRQF_DISABLED | IRQF_SHARED,
921 "[EDAC] MC err", mci);
922 if (res < 0) {
923 printk(KERN_ERR "%s: Unable to request irq %d for "
924 "MPC85xx DRAM ERR\n", __func__, pdata->irq);
925 irq_dispose_mapping(pdata->irq);
926 res = -ENODEV;
927 goto err2;
928 }
929
930 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
931 pdata->irq);
932 }
933
934 devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
935 debugf3("%s(): success\n", __func__);
936 printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
937
938 return 0;
939
940 err2:
941 edac_mc_del_mc(&op->dev);
942 err:
943 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
944 edac_mc_free(mci);
945 return res;
946 }
947
948 static int mpc85xx_mc_err_remove(struct of_device *op)
949 {
950 struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
951 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
952
953 debugf0("%s()\n", __func__);
954
955 if (edac_op_state == EDAC_OPSTATE_INT) {
956 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
957 irq_dispose_mapping(pdata->irq);
958 }
959
960 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
961 orig_ddr_err_disable);
962 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
963
964 edac_mc_del_mc(&op->dev);
965 edac_mc_free(mci);
966 return 0;
967 }
968
969 static struct of_device_id mpc85xx_mc_err_of_match[] = {
970 {
971 .compatible = "fsl,8540-memory-controller",
972 },
973 {
974 .compatible = "fsl,8541-memory-controller",
975 },
976 {
977 .compatible = "fsl,8544-memory-controller",
978 },
979 {
980 .compatible = "fsl,8548-memory-controller",
981 },
982 {
983 .compatible = "fsl,8555-memory-controller",
984 },
985 {
986 .compatible = "fsl,8568-memory-controller",
987 },
988 {
989 .compatible = "fsl,mpc8572-memory-controller",
990 },
991 {},
992 };
993
994 static struct of_platform_driver mpc85xx_mc_err_driver = {
995 .owner = THIS_MODULE,
996 .name = "mpc85xx_mc_err",
997 .match_table = mpc85xx_mc_err_of_match,
998 .probe = mpc85xx_mc_err_probe,
999 .remove = mpc85xx_mc_err_remove,
1000 .driver = {
1001 .name = "mpc85xx_mc_err",
1002 .owner = THIS_MODULE,
1003 },
1004 };
1005
1006
1007 static void __init mpc85xx_mc_clear_rfxe(void *data)
1008 {
1009 orig_hid1[smp_processor_id()] = mfspr(SPRN_HID1);
1010 mtspr(SPRN_HID1, (orig_hid1[smp_processor_id()] & ~0x20000));
1011 }
1012
1013
1014 static int __init mpc85xx_mc_init(void)
1015 {
1016 int res = 0;
1017
1018 printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, "
1019 "(C) 2006 Montavista Software\n");
1020
1021 /* make sure error reporting method is sane */
1022 switch (edac_op_state) {
1023 case EDAC_OPSTATE_POLL:
1024 case EDAC_OPSTATE_INT:
1025 break;
1026 default:
1027 edac_op_state = EDAC_OPSTATE_INT;
1028 break;
1029 }
1030
1031 res = of_register_platform_driver(&mpc85xx_mc_err_driver);
1032 if (res)
1033 printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
1034
1035 res = of_register_platform_driver(&mpc85xx_l2_err_driver);
1036 if (res)
1037 printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
1038
1039 #ifdef CONFIG_PCI
1040 res = of_register_platform_driver(&mpc85xx_pci_err_driver);
1041 if (res)
1042 printk(KERN_WARNING EDAC_MOD_STR "PCI fails to register\n");
1043 #endif
1044
1045 /*
1046 * need to clear HID1[RFXE] to disable machine check int
1047 * so we can catch it
1048 */
1049 if (edac_op_state == EDAC_OPSTATE_INT)
1050 on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0);
1051
1052 return 0;
1053 }
1054
1055 module_init(mpc85xx_mc_init);
1056
1057 static void __exit mpc85xx_mc_restore_hid1(void *data)
1058 {
1059 mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]);
1060 }
1061
1062 static void __exit mpc85xx_mc_exit(void)
1063 {
1064 on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
1065 #ifdef CONFIG_PCI
1066 of_unregister_platform_driver(&mpc85xx_pci_err_driver);
1067 #endif
1068 of_unregister_platform_driver(&mpc85xx_l2_err_driver);
1069 of_unregister_platform_driver(&mpc85xx_mc_err_driver);
1070 }
1071
1072 module_exit(mpc85xx_mc_exit);
1073
1074 MODULE_LICENSE("GPL");
1075 MODULE_AUTHOR("Montavista Software, Inc.");
1076 module_param(edac_op_state, int, 0444);
1077 MODULE_PARM_DESC(edac_op_state,
1078 "EDAC Error Reporting state: 0=Poll, 2=Interrupt");
Stable & featurefull patchset based on Linus's git branch