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security: testing the wrong variable in create_by_name()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / edac / mpc85xx_edac.c
blobecd5928d7110491a71c6158a128f8f50552f9905
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 #ifdef CONFIG_PCI
30 static int edac_pci_idx;
31 #endif
32 static int edac_mc_idx;
33
34 static u32 orig_ddr_err_disable;
35 static u32 orig_ddr_err_sbe;
36
37 /*
38 * PCI Err defines
39 */
40 #ifdef CONFIG_PCI
41 static u32 orig_pci_err_cap_dr;
42 static u32 orig_pci_err_en;
43 #endif
44
45 static u32 orig_l2_err_disable;
46 #ifdef CONFIG_MPC85xx
47 static u32 orig_hid1[2];
48 #endif
49
50 /************************ MC SYSFS parts ***********************************/
51
52 static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
53 char *data)
54 {
55 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
56 return sprintf(data, "0x%08x",
57 in_be32(pdata->mc_vbase +
58 MPC85XX_MC_DATA_ERR_INJECT_HI));
59 }
60
61 static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
62 char *data)
63 {
64 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
65 return sprintf(data, "0x%08x",
66 in_be32(pdata->mc_vbase +
67 MPC85XX_MC_DATA_ERR_INJECT_LO));
68 }
69
70 static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
71 {
72 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
73 return sprintf(data, "0x%08x",
74 in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
75 }
76
77 static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
78 const char *data, size_t count)
79 {
80 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
81 if (isdigit(*data)) {
82 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
83 simple_strtoul(data, NULL, 0));
84 return count;
85 }
86 return 0;
87 }
88
89 static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
90 const char *data, size_t count)
91 {
92 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
93 if (isdigit(*data)) {
94 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
95 simple_strtoul(data, NULL, 0));
96 return count;
97 }
98 return 0;
99 }
100
101 static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
102 const char *data, size_t count)
103 {
104 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
105 if (isdigit(*data)) {
106 out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
107 simple_strtoul(data, NULL, 0));
108 return count;
109 }
110 return 0;
111 }
112
113 static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
114 {
115 .attr = {
116 .name = "inject_data_hi",
117 .mode = (S_IRUGO | S_IWUSR)
118 },
119 .show = mpc85xx_mc_inject_data_hi_show,
120 .store = mpc85xx_mc_inject_data_hi_store},
121 {
122 .attr = {
123 .name = "inject_data_lo",
124 .mode = (S_IRUGO | S_IWUSR)
125 },
126 .show = mpc85xx_mc_inject_data_lo_show,
127 .store = mpc85xx_mc_inject_data_lo_store},
128 {
129 .attr = {
130 .name = "inject_ctrl",
131 .mode = (S_IRUGO | S_IWUSR)
132 },
133 .show = mpc85xx_mc_inject_ctrl_show,
134 .store = mpc85xx_mc_inject_ctrl_store},
135
136 /* End of list */
137 {
138 .attr = {.name = NULL}
139 }
140 };
141
142 static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
143 {
144 mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
145 }
146
147 /**************************** PCI Err device ***************************/
148 #ifdef CONFIG_PCI
149
150 static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
151 {
152 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
153 u32 err_detect;
154
155 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
156
157 /* master aborts can happen during PCI config cycles */
158 if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
159 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
160 return;
161 }
162
163 printk(KERN_ERR "PCI error(s) detected\n");
164 printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
165
166 printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
167 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
168 printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
169 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
170 printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
171 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
172 printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
173 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
174 printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
175 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
176
177 /* clear error bits */
178 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
179
180 if (err_detect & PCI_EDE_PERR_MASK)
181 edac_pci_handle_pe(pci, pci->ctl_name);
182
183 if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
184 edac_pci_handle_npe(pci, pci->ctl_name);
185 }
186
187 static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
188 {
189 struct edac_pci_ctl_info *pci = dev_id;
190 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
191 u32 err_detect;
192
193 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
194
195 if (!err_detect)
196 return IRQ_NONE;
197
198 mpc85xx_pci_check(pci);
199
200 return IRQ_HANDLED;
201 }
202
203 static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
204 const struct of_device_id *match)
205 {
206 struct edac_pci_ctl_info *pci;
207 struct mpc85xx_pci_pdata *pdata;
208 struct resource r;
209 int res = 0;
210
211 if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
212 return -ENOMEM;
213
214 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
215 if (!pci)
216 return -ENOMEM;
217
218 pdata = pci->pvt_info;
219 pdata->name = "mpc85xx_pci_err";
220 pdata->irq = NO_IRQ;
221 dev_set_drvdata(&op->dev, pci);
222 pci->dev = &op->dev;
223 pci->mod_name = EDAC_MOD_STR;
224 pci->ctl_name = pdata->name;
225 pci->dev_name = dev_name(&op->dev);
226
227 if (edac_op_state == EDAC_OPSTATE_POLL)
228 pci->edac_check = mpc85xx_pci_check;
229
230 pdata->edac_idx = edac_pci_idx++;
231
232 res = of_address_to_resource(op->node, 0, &r);
233 if (res) {
234 printk(KERN_ERR "%s: Unable to get resource for "
235 "PCI err regs\n", __func__);
236 goto err;
237 }
238
239 /* we only need the error registers */
240 r.start += 0xe00;
241
242 if (!devm_request_mem_region(&op->dev, r.start,
243 r.end - r.start + 1, pdata->name)) {
244 printk(KERN_ERR "%s: Error while requesting mem region\n",
245 __func__);
246 res = -EBUSY;
247 goto err;
248 }
249
250 pdata->pci_vbase = devm_ioremap(&op->dev, r.start,
251 r.end - r.start + 1);
252 if (!pdata->pci_vbase) {
253 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
254 res = -ENOMEM;
255 goto err;
256 }
257
258 orig_pci_err_cap_dr =
259 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
260
261 /* PCI master abort is expected during config cycles */
262 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
263
264 orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
265
266 /* disable master abort reporting */
267 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
268
269 /* clear error bits */
270 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
271
272 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
273 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
274 goto err;
275 }
276
277 if (edac_op_state == EDAC_OPSTATE_INT) {
278 pdata->irq = irq_of_parse_and_map(op->node, 0);
279 res = devm_request_irq(&op->dev, pdata->irq,
280 mpc85xx_pci_isr, IRQF_DISABLED,
281 "[EDAC] PCI err", pci);
282 if (res < 0) {
283 printk(KERN_ERR
284 "%s: Unable to requiest irq %d for "
285 "MPC85xx PCI err\n", __func__, pdata->irq);
286 irq_dispose_mapping(pdata->irq);
287 res = -ENODEV;
288 goto err2;
289 }
290
291 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
292 pdata->irq);
293 }
294
295 devres_remove_group(&op->dev, mpc85xx_pci_err_probe);
296 debugf3("%s(): success\n", __func__);
297 printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
298
299 return 0;
300
301 err2:
302 edac_pci_del_device(&op->dev);
303 err:
304 edac_pci_free_ctl_info(pci);
305 devres_release_group(&op->dev, mpc85xx_pci_err_probe);
306 return res;
307 }
308
309 static int mpc85xx_pci_err_remove(struct of_device *op)
310 {
311 struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
312 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
313
314 debugf0("%s()\n", __func__);
315
316 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
317 orig_pci_err_cap_dr);
318
319 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
320
321 edac_pci_del_device(pci->dev);
322
323 if (edac_op_state == EDAC_OPSTATE_INT)
324 irq_dispose_mapping(pdata->irq);
325
326 edac_pci_free_ctl_info(pci);
327
328 return 0;
329 }
330
331 static struct of_device_id mpc85xx_pci_err_of_match[] = {
332 {
333 .compatible = "fsl,mpc8540-pcix",
334 },
335 {
336 .compatible = "fsl,mpc8540-pci",
337 },
338 {},
339 };
340
341 static struct of_platform_driver mpc85xx_pci_err_driver = {
342 .owner = THIS_MODULE,
343 .name = "mpc85xx_pci_err",
344 .match_table = mpc85xx_pci_err_of_match,
345 .probe = mpc85xx_pci_err_probe,
346 .remove = __devexit_p(mpc85xx_pci_err_remove),
347 .driver = {
348 .name = "mpc85xx_pci_err",
349 .owner = THIS_MODULE,
350 },
351 };
352
353 #endif /* CONFIG_PCI */
354
355 /**************************** L2 Err device ***************************/
356
357 /************************ L2 SYSFS parts ***********************************/
358
359 static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
360 *edac_dev, char *data)
361 {
362 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
363 return sprintf(data, "0x%08x",
364 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
365 }
366
367 static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
368 *edac_dev, char *data)
369 {
370 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
371 return sprintf(data, "0x%08x",
372 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
373 }
374
375 static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
376 *edac_dev, char *data)
377 {
378 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
379 return sprintf(data, "0x%08x",
380 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
381 }
382
383 static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
384 *edac_dev, const char *data,
385 size_t count)
386 {
387 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
388 if (isdigit(*data)) {
389 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
390 simple_strtoul(data, NULL, 0));
391 return count;
392 }
393 return 0;
394 }
395
396 static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
397 *edac_dev, const char *data,
398 size_t count)
399 {
400 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
401 if (isdigit(*data)) {
402 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
403 simple_strtoul(data, NULL, 0));
404 return count;
405 }
406 return 0;
407 }
408
409 static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
410 *edac_dev, const char *data,
411 size_t count)
412 {
413 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
414 if (isdigit(*data)) {
415 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
416 simple_strtoul(data, NULL, 0));
417 return count;
418 }
419 return 0;
420 }
421
422 static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
423 {
424 .attr = {
425 .name = "inject_data_hi",
426 .mode = (S_IRUGO | S_IWUSR)
427 },
428 .show = mpc85xx_l2_inject_data_hi_show,
429 .store = mpc85xx_l2_inject_data_hi_store},
430 {
431 .attr = {
432 .name = "inject_data_lo",
433 .mode = (S_IRUGO | S_IWUSR)
434 },
435 .show = mpc85xx_l2_inject_data_lo_show,
436 .store = mpc85xx_l2_inject_data_lo_store},
437 {
438 .attr = {
439 .name = "inject_ctrl",
440 .mode = (S_IRUGO | S_IWUSR)
441 },
442 .show = mpc85xx_l2_inject_ctrl_show,
443 .store = mpc85xx_l2_inject_ctrl_store},
444
445 /* End of list */
446 {
447 .attr = {.name = NULL}
448 }
449 };
450
451 static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
452 *edac_dev)
453 {
454 edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
455 }
456
457 /***************************** L2 ops ***********************************/
458
459 static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
460 {
461 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
462 u32 err_detect;
463
464 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
465
466 if (!(err_detect & L2_EDE_MASK))
467 return;
468
469 printk(KERN_ERR "ECC Error in CPU L2 cache\n");
470 printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
471 printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
472 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
473 printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
474 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
475 printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
476 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
477 printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
478 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
479 printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
480 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
481
482 /* clear error detect register */
483 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
484
485 if (err_detect & L2_EDE_CE_MASK)
486 edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
487
488 if (err_detect & L2_EDE_UE_MASK)
489 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
490 }
491
492 static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
493 {
494 struct edac_device_ctl_info *edac_dev = dev_id;
495 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
496 u32 err_detect;
497
498 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
499
500 if (!(err_detect & L2_EDE_MASK))
501 return IRQ_NONE;
502
503 mpc85xx_l2_check(edac_dev);
504
505 return IRQ_HANDLED;
506 }
507
508 static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
509 const struct of_device_id *match)
510 {
511 struct edac_device_ctl_info *edac_dev;
512 struct mpc85xx_l2_pdata *pdata;
513 struct resource r;
514 int res;
515
516 if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
517 return -ENOMEM;
518
519 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
520 "cpu", 1, "L", 1, 2, NULL, 0,
521 edac_dev_idx);
522 if (!edac_dev) {
523 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
524 return -ENOMEM;
525 }
526
527 pdata = edac_dev->pvt_info;
528 pdata->name = "mpc85xx_l2_err";
529 pdata->irq = NO_IRQ;
530 edac_dev->dev = &op->dev;
531 dev_set_drvdata(edac_dev->dev, edac_dev);
532 edac_dev->ctl_name = pdata->name;
533 edac_dev->dev_name = pdata->name;
534
535 res = of_address_to_resource(op->node, 0, &r);
536 if (res) {
537 printk(KERN_ERR "%s: Unable to get resource for "
538 "L2 err regs\n", __func__);
539 goto err;
540 }
541
542 /* we only need the error registers */
543 r.start += 0xe00;
544
545 if (!devm_request_mem_region(&op->dev, r.start,
546 r.end - r.start + 1, pdata->name)) {
547 printk(KERN_ERR "%s: Error while requesting mem region\n",
548 __func__);
549 res = -EBUSY;
550 goto err;
551 }
552
553 pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
554 if (!pdata->l2_vbase) {
555 printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
556 res = -ENOMEM;
557 goto err;
558 }
559
560 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
561
562 orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
563
564 /* clear the err_dis */
565 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
566
567 edac_dev->mod_name = EDAC_MOD_STR;
568
569 if (edac_op_state == EDAC_OPSTATE_POLL)
570 edac_dev->edac_check = mpc85xx_l2_check;
571
572 mpc85xx_set_l2_sysfs_attributes(edac_dev);
573
574 pdata->edac_idx = edac_dev_idx++;
575
576 if (edac_device_add_device(edac_dev) > 0) {
577 debugf3("%s(): failed edac_device_add_device()\n", __func__);
578 goto err;
579 }
580
581 if (edac_op_state == EDAC_OPSTATE_INT) {
582 pdata->irq = irq_of_parse_and_map(op->node, 0);
583 res = devm_request_irq(&op->dev, pdata->irq,
584 mpc85xx_l2_isr, IRQF_DISABLED,
585 "[EDAC] L2 err", edac_dev);
586 if (res < 0) {
587 printk(KERN_ERR
588 "%s: Unable to requiest irq %d for "
589 "MPC85xx L2 err\n", __func__, pdata->irq);
590 irq_dispose_mapping(pdata->irq);
591 res = -ENODEV;
592 goto err2;
593 }
594
595 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
596 pdata->irq);
597
598 edac_dev->op_state = OP_RUNNING_INTERRUPT;
599
600 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
601 }
602
603 devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
604
605 debugf3("%s(): success\n", __func__);
606 printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
607
608 return 0;
609
610 err2:
611 edac_device_del_device(&op->dev);
612 err:
613 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
614 edac_device_free_ctl_info(edac_dev);
615 return res;
616 }
617
618 static int mpc85xx_l2_err_remove(struct of_device *op)
619 {
620 struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
621 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
622
623 debugf0("%s()\n", __func__);
624
625 if (edac_op_state == EDAC_OPSTATE_INT) {
626 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
627 irq_dispose_mapping(pdata->irq);
628 }
629
630 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
631 edac_device_del_device(&op->dev);
632 edac_device_free_ctl_info(edac_dev);
633 return 0;
634 }
635
636 static struct of_device_id mpc85xx_l2_err_of_match[] = {
637 /* deprecate the fsl,85.. forms in the future, 2.6.30? */
638 { .compatible = "fsl,8540-l2-cache-controller", },
639 { .compatible = "fsl,8541-l2-cache-controller", },
640 { .compatible = "fsl,8544-l2-cache-controller", },
641 { .compatible = "fsl,8548-l2-cache-controller", },
642 { .compatible = "fsl,8555-l2-cache-controller", },
643 { .compatible = "fsl,8568-l2-cache-controller", },
644 { .compatible = "fsl,mpc8536-l2-cache-controller", },
645 { .compatible = "fsl,mpc8540-l2-cache-controller", },
646 { .compatible = "fsl,mpc8541-l2-cache-controller", },
647 { .compatible = "fsl,mpc8544-l2-cache-controller", },
648 { .compatible = "fsl,mpc8548-l2-cache-controller", },
649 { .compatible = "fsl,mpc8555-l2-cache-controller", },
650 { .compatible = "fsl,mpc8560-l2-cache-controller", },
651 { .compatible = "fsl,mpc8568-l2-cache-controller", },
652 { .compatible = "fsl,mpc8572-l2-cache-controller", },
653 { .compatible = "fsl,p2020-l2-cache-controller", },
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 case DSC_SDTYPE_DDR3:
766 mtype = MEM_RDDR3;
767 break;
768 default:
769 mtype = MEM_UNKNOWN;
770 break;
771 }
772 } else {
773 switch (sdtype) {
774 case DSC_SDTYPE_DDR:
775 mtype = MEM_DDR;
776 break;
777 case DSC_SDTYPE_DDR2:
778 mtype = MEM_DDR2;
779 break;
780 case DSC_SDTYPE_DDR3:
781 mtype = MEM_DDR3;
782 break;
783 default:
784 mtype = MEM_UNKNOWN;
785 break;
786 }
787 }
788
789 for (index = 0; index < mci->nr_csrows; index++) {
790 u32 start;
791 u32 end;
792
793 csrow = &mci->csrows[index];
794 cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
795 (index * MPC85XX_MC_CS_BNDS_OFS));
796
797 start = (cs_bnds & 0xffff0000) >> 16;
798 end = (cs_bnds & 0x0000ffff);
799
800 if (start == end)
801 continue; /* not populated */
802
803 start <<= (24 - PAGE_SHIFT);
804 end <<= (24 - PAGE_SHIFT);
805 end |= (1 << (24 - PAGE_SHIFT)) - 1;
806
807 csrow->first_page = start;
808 csrow->last_page = end;
809 csrow->nr_pages = end + 1 - start;
810 csrow->grain = 8;
811 csrow->mtype = mtype;
812 csrow->dtype = DEV_UNKNOWN;
813 if (sdram_ctl & DSC_X32_EN)
814 csrow->dtype = DEV_X32;
815 csrow->edac_mode = EDAC_SECDED;
816 }
817 }
818
819 static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
820 const struct of_device_id *match)
821 {
822 struct mem_ctl_info *mci;
823 struct mpc85xx_mc_pdata *pdata;
824 struct resource r;
825 u32 sdram_ctl;
826 int res;
827
828 if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
829 return -ENOMEM;
830
831 mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
832 if (!mci) {
833 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
834 return -ENOMEM;
835 }
836
837 pdata = mci->pvt_info;
838 pdata->name = "mpc85xx_mc_err";
839 pdata->irq = NO_IRQ;
840 mci->dev = &op->dev;
841 pdata->edac_idx = edac_mc_idx++;
842 dev_set_drvdata(mci->dev, mci);
843 mci->ctl_name = pdata->name;
844 mci->dev_name = pdata->name;
845
846 res = of_address_to_resource(op->node, 0, &r);
847 if (res) {
848 printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
849 __func__);
850 goto err;
851 }
852
853 if (!devm_request_mem_region(&op->dev, r.start,
854 r.end - r.start + 1, pdata->name)) {
855 printk(KERN_ERR "%s: Error while requesting mem region\n",
856 __func__);
857 res = -EBUSY;
858 goto err;
859 }
860
861 pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
862 if (!pdata->mc_vbase) {
863 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
864 res = -ENOMEM;
865 goto err;
866 }
867
868 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
869 if (!(sdram_ctl & DSC_ECC_EN)) {
870 /* no ECC */
871 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
872 res = -ENODEV;
873 goto err;
874 }
875
876 debugf3("%s(): init mci\n", __func__);
877 mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
878 MEM_FLAG_DDR | MEM_FLAG_DDR2;
879 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
880 mci->edac_cap = EDAC_FLAG_SECDED;
881 mci->mod_name = EDAC_MOD_STR;
882 mci->mod_ver = MPC85XX_REVISION;
883
884 if (edac_op_state == EDAC_OPSTATE_POLL)
885 mci->edac_check = mpc85xx_mc_check;
886
887 mci->ctl_page_to_phys = NULL;
888
889 mci->scrub_mode = SCRUB_SW_SRC;
890
891 mpc85xx_set_mc_sysfs_attributes(mci);
892
893 mpc85xx_init_csrows(mci);
894
895 /* store the original error disable bits */
896 orig_ddr_err_disable =
897 in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
898 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
899
900 /* clear all error bits */
901 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
902
903 if (edac_mc_add_mc(mci)) {
904 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
905 goto err;
906 }
907
908 if (edac_op_state == EDAC_OPSTATE_INT) {
909 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
910 DDR_EIE_MBEE | DDR_EIE_SBEE);
911
912 /* store the original error management threshold */
913 orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
914 MPC85XX_MC_ERR_SBE) & 0xff0000;
915
916 /* set threshold to 1 error per interrupt */
917 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
918
919 /* register interrupts */
920 pdata->irq = irq_of_parse_and_map(op->node, 0);
921 res = devm_request_irq(&op->dev, pdata->irq,
922 mpc85xx_mc_isr,
923 IRQF_DISABLED | IRQF_SHARED,
924 "[EDAC] MC err", mci);
925 if (res < 0) {
926 printk(KERN_ERR "%s: Unable to request irq %d for "
927 "MPC85xx DRAM ERR\n", __func__, pdata->irq);
928 irq_dispose_mapping(pdata->irq);
929 res = -ENODEV;
930 goto err2;
931 }
932
933 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
934 pdata->irq);
935 }
936
937 devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
938 debugf3("%s(): success\n", __func__);
939 printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
940
941 return 0;
942
943 err2:
944 edac_mc_del_mc(&op->dev);
945 err:
946 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
947 edac_mc_free(mci);
948 return res;
949 }
950
951 static int mpc85xx_mc_err_remove(struct of_device *op)
952 {
953 struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
954 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
955
956 debugf0("%s()\n", __func__);
957
958 if (edac_op_state == EDAC_OPSTATE_INT) {
959 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
960 irq_dispose_mapping(pdata->irq);
961 }
962
963 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
964 orig_ddr_err_disable);
965 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
966
967 edac_mc_del_mc(&op->dev);
968 edac_mc_free(mci);
969 return 0;
970 }
971
972 static struct of_device_id mpc85xx_mc_err_of_match[] = {
973 /* deprecate the fsl,85.. forms in the future, 2.6.30? */
974 { .compatible = "fsl,8540-memory-controller", },
975 { .compatible = "fsl,8541-memory-controller", },
976 { .compatible = "fsl,8544-memory-controller", },
977 { .compatible = "fsl,8548-memory-controller", },
978 { .compatible = "fsl,8555-memory-controller", },
979 { .compatible = "fsl,8568-memory-controller", },
980 { .compatible = "fsl,mpc8536-memory-controller", },
981 { .compatible = "fsl,mpc8540-memory-controller", },
982 { .compatible = "fsl,mpc8541-memory-controller", },
983 { .compatible = "fsl,mpc8544-memory-controller", },
984 { .compatible = "fsl,mpc8548-memory-controller", },
985 { .compatible = "fsl,mpc8555-memory-controller", },
986 { .compatible = "fsl,mpc8560-memory-controller", },
987 { .compatible = "fsl,mpc8568-memory-controller", },
988 { .compatible = "fsl,mpc8572-memory-controller", },
989 { .compatible = "fsl,mpc8349-memory-controller", },
990 { .compatible = "fsl,p2020-memory-controller", },
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 #ifdef CONFIG_MPC85xx
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 #endif
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 #ifdef CONFIG_MPC85xx
1046 /*
1047 * need to clear HID1[RFXE] to disable machine check int
1048 * so we can catch it
1049 */
1050 if (edac_op_state == EDAC_OPSTATE_INT)
1051 on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0);
1052 #endif
1053
1054 return 0;
1055 }
1056
1057 module_init(mpc85xx_mc_init);
1058
1059 #ifdef CONFIG_MPC85xx
1060 static void __exit mpc85xx_mc_restore_hid1(void *data)
1061 {
1062 mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]);
1063 }
1064 #endif
1065
1066 static void __exit mpc85xx_mc_exit(void)
1067 {
1068 #ifdef CONFIG_MPC85xx
1069 on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
1070 #endif
1071 #ifdef CONFIG_PCI
1072 of_unregister_platform_driver(&mpc85xx_pci_err_driver);
1073 #endif
1074 of_unregister_platform_driver(&mpc85xx_l2_err_driver);
1075 of_unregister_platform_driver(&mpc85xx_mc_err_driver);
1076 }
1077
1078 module_exit(mpc85xx_mc_exit);
1079
1080 MODULE_LICENSE("GPL");
1081 MODULE_AUTHOR("Montavista Software, Inc.");
1082 module_param(edac_op_state, int, 0444);
1083 MODULE_PARM_DESC(edac_op_state,
1084 "EDAC Error Reporting state: 0=Poll, 2=Interrupt");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree