Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / edac / amd8111_edac.c
blobb5786cfded3a787e7f6fc6838e287f3c46127a5b
1 /*
2 * amd8111_edac.c, AMD8111 Hyper Transport chip EDAC kernel module
4 * Copyright (c) 2008 Wind River Systems, Inc.
6 * Authors: Cao Qingtao <qingtao.cao@windriver.com>
7 * Benjamin Walsh <benjamin.walsh@windriver.com>
8 * Hu Yongqi <yongqi.hu@windriver.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17 * See the GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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>
32 #include "edac_module.h"
33 #include "amd8111_edac.h"
35 #define AMD8111_EDAC_REVISION " Ver: 1.0.0"
36 #define AMD8111_EDAC_MOD_STR "amd8111_edac"
38 #define PCI_DEVICE_ID_AMD_8111_PCI 0x7460
40 enum amd8111_edac_devs {
41 LPC_BRIDGE = 0,
44 enum amd8111_edac_pcis {
45 PCI_BRIDGE = 0,
48 /* Wrapper functions for accessing PCI configuration space */
49 static int edac_pci_read_dword(struct pci_dev *dev, int reg, u32 *val32)
51 int ret;
53 ret = pci_read_config_dword(dev, reg, val32);
54 if (ret != 0)
55 printk(KERN_ERR AMD8111_EDAC_MOD_STR
56 " PCI Access Read Error at 0x%x\n", reg);
58 return ret;
61 static void edac_pci_read_byte(struct pci_dev *dev, int reg, u8 *val8)
63 int ret;
65 ret = pci_read_config_byte(dev, reg, val8);
66 if (ret != 0)
67 printk(KERN_ERR AMD8111_EDAC_MOD_STR
68 " PCI Access Read Error at 0x%x\n", reg);
71 static void edac_pci_write_dword(struct pci_dev *dev, int reg, u32 val32)
73 int ret;
75 ret = pci_write_config_dword(dev, reg, val32);
76 if (ret != 0)
77 printk(KERN_ERR AMD8111_EDAC_MOD_STR
78 " PCI Access Write Error at 0x%x\n", reg);
81 static void edac_pci_write_byte(struct pci_dev *dev, int reg, u8 val8)
83 int ret;
85 ret = pci_write_config_byte(dev, reg, val8);
86 if (ret != 0)
87 printk(KERN_ERR AMD8111_EDAC_MOD_STR
88 " PCI Access Write Error at 0x%x\n", reg);
92 * device-specific methods for amd8111 PCI Bridge Controller
94 * Error Reporting and Handling for amd8111 chipset could be found
95 * in its datasheet 3.1.2 section, P37
97 static void amd8111_pci_bridge_init(struct amd8111_pci_info *pci_info)
99 u32 val32;
100 struct pci_dev *dev = pci_info->dev;
102 /* First clear error detection flags on the host interface */
104 /* Clear SSE/SMA/STA flags in the global status register*/
105 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
106 if (val32 & PCI_STSCMD_CLEAR_MASK)
107 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
109 /* Clear CRC and Link Fail flags in HT Link Control reg */
110 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
111 if (val32 & HT_LINK_CLEAR_MASK)
112 edac_pci_write_dword(dev, REG_HT_LINK, val32);
114 /* Second clear all fault on the secondary interface */
116 /* Clear error flags in the memory-base limit reg. */
117 edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
118 if (val32 & MEM_LIMIT_CLEAR_MASK)
119 edac_pci_write_dword(dev, REG_MEM_LIM, val32);
121 /* Clear Discard Timer Expired flag in Interrupt/Bridge Control reg */
122 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
123 if (val32 & PCI_INTBRG_CTRL_CLEAR_MASK)
124 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
126 /* Last enable error detections */
127 if (edac_op_state == EDAC_OPSTATE_POLL) {
128 /* Enable System Error reporting in global status register */
129 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
130 val32 |= PCI_STSCMD_SERREN;
131 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
133 /* Enable CRC Sync flood packets to HyperTransport Link */
134 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
135 val32 |= HT_LINK_CRCFEN;
136 edac_pci_write_dword(dev, REG_HT_LINK, val32);
138 /* Enable SSE reporting etc in Interrupt control reg */
139 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
140 val32 |= PCI_INTBRG_CTRL_POLL_MASK;
141 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
145 static void amd8111_pci_bridge_exit(struct amd8111_pci_info *pci_info)
147 u32 val32;
148 struct pci_dev *dev = pci_info->dev;
150 if (edac_op_state == EDAC_OPSTATE_POLL) {
151 /* Disable System Error reporting */
152 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
153 val32 &= ~PCI_STSCMD_SERREN;
154 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
156 /* Disable CRC flood packets */
157 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
158 val32 &= ~HT_LINK_CRCFEN;
159 edac_pci_write_dword(dev, REG_HT_LINK, val32);
161 /* Disable DTSERREN/MARSP/SERREN in Interrupt Control reg */
162 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
163 val32 &= ~PCI_INTBRG_CTRL_POLL_MASK;
164 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
168 static void amd8111_pci_bridge_check(struct edac_pci_ctl_info *edac_dev)
170 struct amd8111_pci_info *pci_info = edac_dev->pvt_info;
171 struct pci_dev *dev = pci_info->dev;
172 u32 val32;
174 /* Check out PCI Bridge Status and Command Register */
175 edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
176 if (val32 & PCI_STSCMD_CLEAR_MASK) {
177 printk(KERN_INFO "Error(s) in PCI bridge status and command"
178 "register on device %s\n", pci_info->ctl_name);
179 printk(KERN_INFO "SSE: %d, RMA: %d, RTA: %d\n",
180 (val32 & PCI_STSCMD_SSE) != 0,
181 (val32 & PCI_STSCMD_RMA) != 0,
182 (val32 & PCI_STSCMD_RTA) != 0);
184 val32 |= PCI_STSCMD_CLEAR_MASK;
185 edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
187 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
190 /* Check out HyperTransport Link Control Register */
191 edac_pci_read_dword(dev, REG_HT_LINK, &val32);
192 if (val32 & HT_LINK_LKFAIL) {
193 printk(KERN_INFO "Error(s) in hypertransport link control"
194 "register on device %s\n", pci_info->ctl_name);
195 printk(KERN_INFO "LKFAIL: %d\n",
196 (val32 & HT_LINK_LKFAIL) != 0);
198 val32 |= HT_LINK_LKFAIL;
199 edac_pci_write_dword(dev, REG_HT_LINK, val32);
201 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
204 /* Check out PCI Interrupt and Bridge Control Register */
205 edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
206 if (val32 & PCI_INTBRG_CTRL_DTSTAT) {
207 printk(KERN_INFO "Error(s) in PCI interrupt and bridge control"
208 "register on device %s\n", pci_info->ctl_name);
209 printk(KERN_INFO "DTSTAT: %d\n",
210 (val32 & PCI_INTBRG_CTRL_DTSTAT) != 0);
212 val32 |= PCI_INTBRG_CTRL_DTSTAT;
213 edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
215 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
218 /* Check out PCI Bridge Memory Base-Limit Register */
219 edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
220 if (val32 & MEM_LIMIT_CLEAR_MASK) {
221 printk(KERN_INFO
222 "Error(s) in mem limit register on %s device\n",
223 pci_info->ctl_name);
224 printk(KERN_INFO "DPE: %d, RSE: %d, RMA: %d\n"
225 "RTA: %d, STA: %d, MDPE: %d\n",
226 (val32 & MEM_LIMIT_DPE) != 0,
227 (val32 & MEM_LIMIT_RSE) != 0,
228 (val32 & MEM_LIMIT_RMA) != 0,
229 (val32 & MEM_LIMIT_RTA) != 0,
230 (val32 & MEM_LIMIT_STA) != 0,
231 (val32 & MEM_LIMIT_MDPE) != 0);
233 val32 |= MEM_LIMIT_CLEAR_MASK;
234 edac_pci_write_dword(dev, REG_MEM_LIM, val32);
236 edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
240 static struct resource *legacy_io_res;
241 static int at_compat_reg_broken;
242 #define LEGACY_NR_PORTS 1
244 /* device-specific methods for amd8111 LPC Bridge device */
245 static void amd8111_lpc_bridge_init(struct amd8111_dev_info *dev_info)
247 u8 val8;
248 struct pci_dev *dev = dev_info->dev;
250 /* First clear REG_AT_COMPAT[SERR, IOCHK] if necessary */
251 legacy_io_res = request_region(REG_AT_COMPAT, LEGACY_NR_PORTS,
252 AMD8111_EDAC_MOD_STR);
253 if (!legacy_io_res)
254 printk(KERN_INFO "%s: failed to request legacy I/O region "
255 "start %d, len %d\n", __func__,
256 REG_AT_COMPAT, LEGACY_NR_PORTS);
257 else {
258 val8 = __do_inb(REG_AT_COMPAT);
259 if (val8 == 0xff) { /* buggy port */
260 printk(KERN_INFO "%s: port %d is buggy, not supported"
261 " by hardware?\n", __func__, REG_AT_COMPAT);
262 at_compat_reg_broken = 1;
263 release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
264 legacy_io_res = NULL;
265 } else {
266 u8 out8 = 0;
267 if (val8 & AT_COMPAT_SERR)
268 out8 = AT_COMPAT_CLRSERR;
269 if (val8 & AT_COMPAT_IOCHK)
270 out8 |= AT_COMPAT_CLRIOCHK;
271 if (out8 > 0)
272 __do_outb(out8, REG_AT_COMPAT);
276 /* Second clear error flags on LPC bridge */
277 edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
278 if (val8 & IO_CTRL_1_CLEAR_MASK)
279 edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
282 static void amd8111_lpc_bridge_exit(struct amd8111_dev_info *dev_info)
284 if (legacy_io_res)
285 release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
288 static void amd8111_lpc_bridge_check(struct edac_device_ctl_info *edac_dev)
290 struct amd8111_dev_info *dev_info = edac_dev->pvt_info;
291 struct pci_dev *dev = dev_info->dev;
292 u8 val8;
294 edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
295 if (val8 & IO_CTRL_1_CLEAR_MASK) {
296 printk(KERN_INFO
297 "Error(s) in IO control register on %s device\n",
298 dev_info->ctl_name);
299 printk(KERN_INFO "LPC ERR: %d, PW2LPC: %d\n",
300 (val8 & IO_CTRL_1_LPC_ERR) != 0,
301 (val8 & IO_CTRL_1_PW2LPC) != 0);
303 val8 |= IO_CTRL_1_CLEAR_MASK;
304 edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
306 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
309 if (at_compat_reg_broken == 0) {
310 u8 out8 = 0;
311 val8 = __do_inb(REG_AT_COMPAT);
312 if (val8 & AT_COMPAT_SERR)
313 out8 = AT_COMPAT_CLRSERR;
314 if (val8 & AT_COMPAT_IOCHK)
315 out8 |= AT_COMPAT_CLRIOCHK;
316 if (out8 > 0) {
317 __do_outb(out8, REG_AT_COMPAT);
318 edac_device_handle_ue(edac_dev, 0, 0,
319 edac_dev->ctl_name);
324 /* General devices represented by edac_device_ctl_info */
325 static struct amd8111_dev_info amd8111_devices[] = {
326 [LPC_BRIDGE] = {
327 .err_dev = PCI_DEVICE_ID_AMD_8111_LPC,
328 .ctl_name = "lpc",
329 .init = amd8111_lpc_bridge_init,
330 .exit = amd8111_lpc_bridge_exit,
331 .check = amd8111_lpc_bridge_check,
333 {0},
336 /* PCI controllers represented by edac_pci_ctl_info */
337 static struct amd8111_pci_info amd8111_pcis[] = {
338 [PCI_BRIDGE] = {
339 .err_dev = PCI_DEVICE_ID_AMD_8111_PCI,
340 .ctl_name = "AMD8111_PCI_Controller",
341 .init = amd8111_pci_bridge_init,
342 .exit = amd8111_pci_bridge_exit,
343 .check = amd8111_pci_bridge_check,
345 {0},
348 static int amd8111_dev_probe(struct pci_dev *dev,
349 const struct pci_device_id *id)
351 struct amd8111_dev_info *dev_info = &amd8111_devices[id->driver_data];
352 int ret = -ENODEV;
354 dev_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
355 dev_info->err_dev, NULL);
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 goto err;
365 if (pci_enable_device(dev_info->dev)) {
366 printk(KERN_ERR "failed to enable:"
367 "vendor %x, device %x, name %s\n",
368 PCI_VENDOR_ID_AMD, dev_info->err_dev,
369 dev_info->ctl_name);
370 goto err_dev_put;
374 * we do not allocate extra private structure for
375 * edac_device_ctl_info, but make use of existing
376 * one instead.
378 dev_info->edac_idx = edac_device_alloc_index();
379 dev_info->edac_dev =
380 edac_device_alloc_ctl_info(0, dev_info->ctl_name, 1,
381 NULL, 0, 0,
382 NULL, 0, dev_info->edac_idx);
383 if (!dev_info->edac_dev) {
384 ret = -ENOMEM;
385 goto err_dev_put;
388 dev_info->edac_dev->pvt_info = dev_info;
389 dev_info->edac_dev->dev = &dev_info->dev->dev;
390 dev_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
391 dev_info->edac_dev->ctl_name = dev_info->ctl_name;
392 dev_info->edac_dev->dev_name = dev_name(&dev_info->dev->dev);
394 if (edac_op_state == EDAC_OPSTATE_POLL)
395 dev_info->edac_dev->edac_check = dev_info->check;
397 if (dev_info->init)
398 dev_info->init(dev_info);
400 if (edac_device_add_device(dev_info->edac_dev) > 0) {
401 printk(KERN_ERR "failed to add edac_dev for %s\n",
402 dev_info->ctl_name);
403 goto err_edac_free_ctl;
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);
411 return 0;
413 err_edac_free_ctl:
414 edac_device_free_ctl_info(dev_info->edac_dev);
415 err_dev_put:
416 pci_dev_put(dev_info->dev);
417 err:
418 return ret;
421 static void amd8111_dev_remove(struct pci_dev *dev)
423 struct amd8111_dev_info *dev_info;
425 for (dev_info = amd8111_devices; dev_info->err_dev; dev_info++)
426 if (dev_info->dev->device == dev->device)
427 break;
429 if (!dev_info->err_dev) /* should never happen */
430 return;
432 if (dev_info->edac_dev) {
433 edac_device_del_device(dev_info->edac_dev->dev);
434 edac_device_free_ctl_info(dev_info->edac_dev);
437 if (dev_info->exit)
438 dev_info->exit(dev_info);
440 pci_dev_put(dev_info->dev);
443 static int amd8111_pci_probe(struct pci_dev *dev,
444 const struct pci_device_id *id)
446 struct amd8111_pci_info *pci_info = &amd8111_pcis[id->driver_data];
447 int ret = -ENODEV;
449 pci_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
450 pci_info->err_dev, NULL);
452 if (!pci_info->dev) {
453 printk(KERN_ERR "EDAC device not found:"
454 "vendor %x, device %x, name %s\n",
455 PCI_VENDOR_ID_AMD, pci_info->err_dev,
456 pci_info->ctl_name);
457 goto err;
460 if (pci_enable_device(pci_info->dev)) {
461 printk(KERN_ERR "failed to enable:"
462 "vendor %x, device %x, name %s\n",
463 PCI_VENDOR_ID_AMD, pci_info->err_dev,
464 pci_info->ctl_name);
465 goto err_dev_put;
469 * we do not allocate extra private structure for
470 * edac_pci_ctl_info, but make use of existing
471 * one instead.
473 pci_info->edac_idx = edac_pci_alloc_index();
474 pci_info->edac_dev = edac_pci_alloc_ctl_info(0, pci_info->ctl_name);
475 if (!pci_info->edac_dev) {
476 ret = -ENOMEM;
477 goto err_dev_put;
480 pci_info->edac_dev->pvt_info = pci_info;
481 pci_info->edac_dev->dev = &pci_info->dev->dev;
482 pci_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
483 pci_info->edac_dev->ctl_name = pci_info->ctl_name;
484 pci_info->edac_dev->dev_name = dev_name(&pci_info->dev->dev);
486 if (edac_op_state == EDAC_OPSTATE_POLL)
487 pci_info->edac_dev->edac_check = pci_info->check;
489 if (pci_info->init)
490 pci_info->init(pci_info);
492 if (edac_pci_add_device(pci_info->edac_dev, pci_info->edac_idx) > 0) {
493 printk(KERN_ERR "failed to add edac_pci for %s\n",
494 pci_info->ctl_name);
495 goto err_edac_free_ctl;
498 printk(KERN_INFO "added one edac_pci on AMD8111 "
499 "vendor %x, device %x, name %s\n",
500 PCI_VENDOR_ID_AMD, pci_info->err_dev,
501 pci_info->ctl_name);
503 return 0;
505 err_edac_free_ctl:
506 edac_pci_free_ctl_info(pci_info->edac_dev);
507 err_dev_put:
508 pci_dev_put(pci_info->dev);
509 err:
510 return ret;
513 static void amd8111_pci_remove(struct pci_dev *dev)
515 struct amd8111_pci_info *pci_info;
517 for (pci_info = amd8111_pcis; pci_info->err_dev; pci_info++)
518 if (pci_info->dev->device == dev->device)
519 break;
521 if (!pci_info->err_dev) /* should never happen */
522 return;
524 if (pci_info->edac_dev) {
525 edac_pci_del_device(pci_info->edac_dev->dev);
526 edac_pci_free_ctl_info(pci_info->edac_dev);
529 if (pci_info->exit)
530 pci_info->exit(pci_info);
532 pci_dev_put(pci_info->dev);
535 /* PCI Device ID talbe for general EDAC device */
536 static const struct pci_device_id amd8111_edac_dev_tbl[] = {
538 PCI_VEND_DEV(AMD, 8111_LPC),
539 .subvendor = PCI_ANY_ID,
540 .subdevice = PCI_ANY_ID,
541 .class = 0,
542 .class_mask = 0,
543 .driver_data = LPC_BRIDGE,
547 } /* table is NULL-terminated */
549 MODULE_DEVICE_TABLE(pci, amd8111_edac_dev_tbl);
551 static struct pci_driver amd8111_edac_dev_driver = {
552 .name = "AMD8111_EDAC_DEV",
553 .probe = amd8111_dev_probe,
554 .remove = amd8111_dev_remove,
555 .id_table = amd8111_edac_dev_tbl,
558 /* PCI Device ID table for EDAC PCI controller */
559 static const struct pci_device_id amd8111_edac_pci_tbl[] = {
561 PCI_VEND_DEV(AMD, 8111_PCI),
562 .subvendor = PCI_ANY_ID,
563 .subdevice = PCI_ANY_ID,
564 .class = 0,
565 .class_mask = 0,
566 .driver_data = PCI_BRIDGE,
570 } /* table is NULL-terminated */
572 MODULE_DEVICE_TABLE(pci, amd8111_edac_pci_tbl);
574 static struct pci_driver amd8111_edac_pci_driver = {
575 .name = "AMD8111_EDAC_PCI",
576 .probe = amd8111_pci_probe,
577 .remove = amd8111_pci_remove,
578 .id_table = amd8111_edac_pci_tbl,
581 static int __init amd8111_edac_init(void)
583 int val;
585 printk(KERN_INFO "AMD8111 EDAC driver " AMD8111_EDAC_REVISION "\n");
586 printk(KERN_INFO "\t(c) 2008 Wind River Systems, Inc.\n");
588 /* Only POLL mode supported so far */
589 edac_op_state = EDAC_OPSTATE_POLL;
591 val = pci_register_driver(&amd8111_edac_dev_driver);
592 val |= pci_register_driver(&amd8111_edac_pci_driver);
594 return val;
597 static void __exit amd8111_edac_exit(void)
599 pci_unregister_driver(&amd8111_edac_pci_driver);
600 pci_unregister_driver(&amd8111_edac_dev_driver);
604 module_init(amd8111_edac_init);
605 module_exit(amd8111_edac_exit);
607 MODULE_LICENSE("GPL");
608 MODULE_AUTHOR("Cao Qingtao <qingtao.cao@windriver.com>\n");
609 MODULE_DESCRIPTION("AMD8111 HyperTransport I/O Hub EDAC kernel module");