blob: b8a95cf50718b8e6ef15f74a9c12d49b2b486568 [file] [log] [blame]
Alan Cox0d88a102006-01-18 17:44:10 -08001/*
2 * Intel 82860 Memory Controller kernel module
3 * (C) 2005 Red Hat (http://www.redhat.com)
4 * This file may be distributed under the terms of the
5 * GNU General Public License.
6 *
7 * Written by Ben Woodard <woodard@redhat.com>
8 * shamelessly copied from and based upon the edac_i82875 driver
9 * by Thayne Harbaugh of Linux Networx. (http://lnxi.com)
10 */
11
Alan Cox0d88a102006-01-18 17:44:10 -080012#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/pci.h>
15#include <linux/pci_ids.h>
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -070016#include <linux/edac.h>
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070017#include "edac_core.h"
Alan Cox0d88a102006-01-18 17:44:10 -080018
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070019#define I82860_REVISION " Ver: 2.0.2 " __DATE__
Doug Thompson929a40e2006-07-01 04:35:45 -070020#define EDAC_MOD_STR "i82860_edac"
Doug Thompson37f04582006-06-30 01:56:07 -070021
Dave Peterson537fba22006-03-26 01:38:40 -080022#define i82860_printk(level, fmt, arg...) \
Dave Petersone7ecd892006-03-26 01:38:52 -080023 edac_printk(level, "i82860", fmt, ##arg)
Dave Peterson537fba22006-03-26 01:38:40 -080024
25#define i82860_mc_printk(mci, level, fmt, arg...) \
Dave Petersone7ecd892006-03-26 01:38:52 -080026 edac_mc_chipset_printk(mci, level, "i82860", fmt, ##arg)
Dave Peterson537fba22006-03-26 01:38:40 -080027
Alan Cox0d88a102006-01-18 17:44:10 -080028#ifndef PCI_DEVICE_ID_INTEL_82860_0
29#define PCI_DEVICE_ID_INTEL_82860_0 0x2531
30#endif /* PCI_DEVICE_ID_INTEL_82860_0 */
31
32#define I82860_MCHCFG 0x50
33#define I82860_GBA 0x60
34#define I82860_GBA_MASK 0x7FF
35#define I82860_GBA_SHIFT 24
36#define I82860_ERRSTS 0xC8
37#define I82860_EAP 0xE4
38#define I82860_DERRCTL_STS 0xE2
39
40enum i82860_chips {
41 I82860 = 0,
42};
43
44struct i82860_dev_info {
45 const char *ctl_name;
46};
47
48struct i82860_error_info {
49 u16 errsts;
50 u32 eap;
51 u16 derrsyn;
52 u16 errsts2;
53};
54
55static const struct i82860_dev_info i82860_devs[] = {
56 [I82860] = {
Douglas Thompson052dfb42007-07-19 01:50:13 -070057 .ctl_name = "i82860"},
Alan Cox0d88a102006-01-18 17:44:10 -080058};
59
Douglas Thompsonf0440912007-07-19 01:50:19 -070060static struct pci_dev *mci_pdev; /* init dev: in case that AGP code
Dave Petersone7ecd892006-03-26 01:38:52 -080061 * has already registered driver
62 */
Dave Jiang456a2f92007-07-19 01:50:10 -070063static struct edac_pci_ctl_info *i82860_pci;
Alan Cox0d88a102006-01-18 17:44:10 -080064
Dave Petersone7ecd892006-03-26 01:38:52 -080065static void i82860_get_error_info(struct mem_ctl_info *mci,
Douglas Thompson052dfb42007-07-19 01:50:13 -070066 struct i82860_error_info *info)
Alan Cox0d88a102006-01-18 17:44:10 -080067{
Doug Thompson37f04582006-06-30 01:56:07 -070068 struct pci_dev *pdev;
69
70 pdev = to_pci_dev(mci->dev);
71
Alan Cox0d88a102006-01-18 17:44:10 -080072 /*
73 * This is a mess because there is no atomic way to read all the
74 * registers at once and the registers can transition from CE being
75 * overwritten by UE.
76 */
Doug Thompson37f04582006-06-30 01:56:07 -070077 pci_read_config_word(pdev, I82860_ERRSTS, &info->errsts);
78 pci_read_config_dword(pdev, I82860_EAP, &info->eap);
79 pci_read_config_word(pdev, I82860_DERRCTL_STS, &info->derrsyn);
80 pci_read_config_word(pdev, I82860_ERRSTS, &info->errsts2);
Alan Cox0d88a102006-01-18 17:44:10 -080081
Doug Thompson37f04582006-06-30 01:56:07 -070082 pci_write_bits16(pdev, I82860_ERRSTS, 0x0003, 0x0003);
Alan Cox0d88a102006-01-18 17:44:10 -080083
84 /*
85 * If the error is the same for both reads then the first set of reads
86 * is valid. If there is a change then there is a CE no info and the
87 * second set of reads is valid and should be UE info.
88 */
89 if (!(info->errsts2 & 0x0003))
90 return;
Dave Petersone7ecd892006-03-26 01:38:52 -080091
Alan Cox0d88a102006-01-18 17:44:10 -080092 if ((info->errsts ^ info->errsts2) & 0x0003) {
Doug Thompson37f04582006-06-30 01:56:07 -070093 pci_read_config_dword(pdev, I82860_EAP, &info->eap);
Dave Jiangb4e8b372007-07-19 01:50:04 -070094 pci_read_config_word(pdev, I82860_DERRCTL_STS, &info->derrsyn);
Alan Cox0d88a102006-01-18 17:44:10 -080095 }
96}
97
Dave Petersone7ecd892006-03-26 01:38:52 -080098static int i82860_process_error_info(struct mem_ctl_info *mci,
Douglas Thompson052dfb42007-07-19 01:50:13 -070099 struct i82860_error_info *info,
100 int handle_errors)
Alan Cox0d88a102006-01-18 17:44:10 -0800101{
102 int row;
103
104 if (!(info->errsts2 & 0x0003))
105 return 0;
106
107 if (!handle_errors)
108 return 1;
109
110 if ((info->errsts ^ info->errsts2) & 0x0003) {
111 edac_mc_handle_ce_no_info(mci, "UE overwrote CE");
112 info->errsts = info->errsts2;
113 }
114
115 info->eap >>= PAGE_SHIFT;
116 row = edac_mc_find_csrow_by_page(mci, info->eap);
117
118 if (info->errsts & 0x0002)
119 edac_mc_handle_ue(mci, info->eap, 0, row, "i82860 UE");
120 else
Dave Petersone7ecd892006-03-26 01:38:52 -0800121 edac_mc_handle_ce(mci, info->eap, 0, info->derrsyn, row, 0,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700122 "i82860 UE");
Alan Cox0d88a102006-01-18 17:44:10 -0800123
124 return 1;
125}
126
127static void i82860_check(struct mem_ctl_info *mci)
128{
129 struct i82860_error_info info;
130
Dave Peterson537fba22006-03-26 01:38:40 -0800131 debugf1("MC%d: %s()\n", mci->mc_idx, __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800132 i82860_get_error_info(mci, &info);
133 i82860_process_error_info(mci, &info, 1);
134}
135
Doug Thompson13189522006-06-30 01:56:08 -0700136static void i82860_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev)
137{
138 unsigned long last_cumul_size;
Dave Jiangb4e8b372007-07-19 01:50:04 -0700139 u16 mchcfg_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */
Doug Thompson13189522006-06-30 01:56:08 -0700140 u16 value;
141 u32 cumul_size;
142 struct csrow_info *csrow;
143 int index;
144
145 pci_read_config_word(pdev, I82860_MCHCFG, &mchcfg_ddim);
146 mchcfg_ddim = mchcfg_ddim & 0x180;
147 last_cumul_size = 0;
148
149 /* The group row boundary (GRA) reg values are boundary address
150 * for each DRAM row with a granularity of 16MB. GRA regs are
151 * cumulative; therefore GRA15 will contain the total memory contained
152 * in all eight rows.
153 */
154 for (index = 0; index < mci->nr_csrows; index++) {
155 csrow = &mci->csrows[index];
156 pci_read_config_word(pdev, I82860_GBA + index * 2, &value);
157 cumul_size = (value & I82860_GBA_MASK) <<
Douglas Thompson052dfb42007-07-19 01:50:13 -0700158 (I82860_GBA_SHIFT - PAGE_SHIFT);
Doug Thompson13189522006-06-30 01:56:08 -0700159 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
160 cumul_size);
161
162 if (cumul_size == last_cumul_size)
163 continue; /* not populated */
164
165 csrow->first_page = last_cumul_size;
166 csrow->last_page = cumul_size - 1;
167 csrow->nr_pages = cumul_size - last_cumul_size;
168 last_cumul_size = cumul_size;
169 csrow->grain = 1 << 12; /* I82860_EAP has 4KiB reolution */
170 csrow->mtype = MEM_RMBS;
171 csrow->dtype = DEV_UNKNOWN;
172 csrow->edac_mode = mchcfg_ddim ? EDAC_SECDED : EDAC_NONE;
173 }
174}
175
Alan Cox0d88a102006-01-18 17:44:10 -0800176static int i82860_probe1(struct pci_dev *pdev, int dev_idx)
177{
Doug Thompson13189522006-06-30 01:56:08 -0700178 struct mem_ctl_info *mci;
Dave Peterson749ede52006-03-26 01:38:45 -0800179 struct i82860_error_info discard;
Alan Cox0d88a102006-01-18 17:44:10 -0800180
Alan Cox0d88a102006-01-18 17:44:10 -0800181 /* RDRAM has channels but these don't map onto the abstractions that
182 edac uses.
183 The device groups from the GRA registers seem to map reasonably
184 well onto the notion of a chip select row.
185 There are 16 GRA registers and since the name is associated with
186 the channel and the GRA registers map to physical devices so we are
187 going to make 1 channel for group.
188 */
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700189 mci = edac_mc_alloc(0, 16, 1, 0);
Dave Petersone7ecd892006-03-26 01:38:52 -0800190
Alan Cox0d88a102006-01-18 17:44:10 -0800191 if (!mci)
192 return -ENOMEM;
193
Dave Peterson537fba22006-03-26 01:38:40 -0800194 debugf3("%s(): init mci\n", __func__);
Doug Thompson37f04582006-06-30 01:56:07 -0700195 mci->dev = &pdev->dev;
Alan Cox0d88a102006-01-18 17:44:10 -0800196 mci->mtype_cap = MEM_FLAG_DDR;
Alan Cox0d88a102006-01-18 17:44:10 -0800197 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
198 /* I"m not sure about this but I think that all RDRAM is SECDED */
199 mci->edac_cap = EDAC_FLAG_SECDED;
Dave Peterson680cbbb2006-03-26 01:38:41 -0800200 mci->mod_name = EDAC_MOD_STR;
Doug Thompson37f04582006-06-30 01:56:07 -0700201 mci->mod_ver = I82860_REVISION;
Alan Cox0d88a102006-01-18 17:44:10 -0800202 mci->ctl_name = i82860_devs[dev_idx].ctl_name;
Dave Jiangc4192702007-07-19 01:49:47 -0700203 mci->dev_name = pci_name(pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800204 mci->edac_check = i82860_check;
205 mci->ctl_page_to_phys = NULL;
Doug Thompson13189522006-06-30 01:56:08 -0700206 i82860_init_csrows(mci, pdev);
Dave Jiangb4e8b372007-07-19 01:50:04 -0700207 i82860_get_error_info(mci, &discard); /* clear counters */
Alan Cox0d88a102006-01-18 17:44:10 -0800208
Doug Thompson2d7bbb92006-06-30 01:56:08 -0700209 /* Here we assume that we will never see multiple instances of this
210 * type of memory controller. The ID is therefore hardcoded to 0.
211 */
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700212 if (edac_mc_add_mc(mci)) {
Dave Peterson537fba22006-03-26 01:38:40 -0800213 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
Doug Thompson13189522006-06-30 01:56:08 -0700214 goto fail;
Alan Cox0d88a102006-01-18 17:44:10 -0800215 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800216
Dave Jiang456a2f92007-07-19 01:50:10 -0700217 /* allocating generic PCI control info */
218 i82860_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
219 if (!i82860_pci) {
220 printk(KERN_WARNING
221 "%s(): Unable to create PCI control\n",
222 __func__);
223 printk(KERN_WARNING
224 "%s(): PCI error report via EDAC not setup\n",
225 __func__);
226 }
227
Doug Thompson13189522006-06-30 01:56:08 -0700228 /* get this far and it's successful */
229 debugf3("%s(): success\n", __func__);
230
231 return 0;
232
Douglas Thompson052dfb42007-07-19 01:50:13 -0700233fail:
Doug Thompson13189522006-06-30 01:56:08 -0700234 edac_mc_free(mci);
235 return -ENODEV;
Alan Cox0d88a102006-01-18 17:44:10 -0800236}
237
238/* returns count (>= 0), or negative on error */
239static int __devinit i82860_init_one(struct pci_dev *pdev,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700240 const struct pci_device_id *ent)
Alan Cox0d88a102006-01-18 17:44:10 -0800241{
242 int rc;
243
Dave Peterson537fba22006-03-26 01:38:40 -0800244 debugf0("%s()\n", __func__);
Dave Peterson537fba22006-03-26 01:38:40 -0800245 i82860_printk(KERN_INFO, "i82860 init one\n");
Dave Petersone7ecd892006-03-26 01:38:52 -0800246
247 if (pci_enable_device(pdev) < 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800248 return -EIO;
Dave Petersone7ecd892006-03-26 01:38:52 -0800249
Alan Cox0d88a102006-01-18 17:44:10 -0800250 rc = i82860_probe1(pdev, ent->driver_data);
Dave Petersone7ecd892006-03-26 01:38:52 -0800251
252 if (rc == 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800253 mci_pdev = pci_dev_get(pdev);
Dave Petersone7ecd892006-03-26 01:38:52 -0800254
Alan Cox0d88a102006-01-18 17:44:10 -0800255 return rc;
256}
257
258static void __devexit i82860_remove_one(struct pci_dev *pdev)
259{
260 struct mem_ctl_info *mci;
261
Dave Peterson537fba22006-03-26 01:38:40 -0800262 debugf0("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800263
Dave Jiang456a2f92007-07-19 01:50:10 -0700264 if (i82860_pci)
265 edac_pci_release_generic_ctl(i82860_pci);
266
Doug Thompson37f04582006-06-30 01:56:07 -0700267 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
Dave Peterson18dbc332006-03-26 01:38:50 -0800268 return;
269
270 edac_mc_free(mci);
Alan Cox0d88a102006-01-18 17:44:10 -0800271}
272
273static const struct pci_device_id i82860_pci_tbl[] __devinitdata = {
Dave Petersone7ecd892006-03-26 01:38:52 -0800274 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700275 PCI_VEND_DEV(INTEL, 82860_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
276 I82860},
Dave Petersone7ecd892006-03-26 01:38:52 -0800277 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700278 0,
279 } /* 0 terminated list. */
Alan Cox0d88a102006-01-18 17:44:10 -0800280};
281
282MODULE_DEVICE_TABLE(pci, i82860_pci_tbl);
283
284static struct pci_driver i82860_driver = {
Dave Peterson680cbbb2006-03-26 01:38:41 -0800285 .name = EDAC_MOD_STR,
Alan Cox0d88a102006-01-18 17:44:10 -0800286 .probe = i82860_init_one,
287 .remove = __devexit_p(i82860_remove_one),
288 .id_table = i82860_pci_tbl,
289};
290
Alan Coxda9bb1d2006-01-18 17:44:13 -0800291static int __init i82860_init(void)
Alan Cox0d88a102006-01-18 17:44:10 -0800292{
293 int pci_rc;
294
Dave Peterson537fba22006-03-26 01:38:40 -0800295 debugf3("%s()\n", __func__);
Dave Petersone7ecd892006-03-26 01:38:52 -0800296
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700297 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
298 opstate_init();
299
Alan Cox0d88a102006-01-18 17:44:10 -0800300 if ((pci_rc = pci_register_driver(&i82860_driver)) < 0)
Dave Petersone8a491b2006-03-26 01:38:43 -0800301 goto fail0;
Alan Cox0d88a102006-01-18 17:44:10 -0800302
303 if (!mci_pdev) {
Alan Cox0d88a102006-01-18 17:44:10 -0800304 mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700305 PCI_DEVICE_ID_INTEL_82860_0, NULL);
Dave Petersone7ecd892006-03-26 01:38:52 -0800306
Alan Cox0d88a102006-01-18 17:44:10 -0800307 if (mci_pdev == NULL) {
308 debugf0("860 pci_get_device fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800309 pci_rc = -ENODEV;
310 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800311 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800312
Alan Cox0d88a102006-01-18 17:44:10 -0800313 pci_rc = i82860_init_one(mci_pdev, i82860_pci_tbl);
Dave Petersone7ecd892006-03-26 01:38:52 -0800314
Alan Cox0d88a102006-01-18 17:44:10 -0800315 if (pci_rc < 0) {
316 debugf0("860 init fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800317 pci_rc = -ENODEV;
318 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800319 }
320 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800321
Alan Cox0d88a102006-01-18 17:44:10 -0800322 return 0;
Dave Petersone8a491b2006-03-26 01:38:43 -0800323
Douglas Thompson052dfb42007-07-19 01:50:13 -0700324fail1:
Dave Petersone8a491b2006-03-26 01:38:43 -0800325 pci_unregister_driver(&i82860_driver);
326
Douglas Thompson052dfb42007-07-19 01:50:13 -0700327fail0:
Dave Petersone8a491b2006-03-26 01:38:43 -0800328 if (mci_pdev != NULL)
329 pci_dev_put(mci_pdev);
330
331 return pci_rc;
Alan Cox0d88a102006-01-18 17:44:10 -0800332}
333
334static void __exit i82860_exit(void)
335{
Dave Peterson537fba22006-03-26 01:38:40 -0800336 debugf3("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800337
338 pci_unregister_driver(&i82860_driver);
Dave Petersone8a491b2006-03-26 01:38:43 -0800339
340 if (mci_pdev != NULL)
Alan Cox0d88a102006-01-18 17:44:10 -0800341 pci_dev_put(mci_pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800342}
343
344module_init(i82860_init);
345module_exit(i82860_exit);
346
347MODULE_LICENSE("GPL");
Dave Petersone7ecd892006-03-26 01:38:52 -0800348MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com) "
Douglas Thompson052dfb42007-07-19 01:50:13 -0700349 "Ben Woodard <woodard@redhat.com>");
Alan Cox0d88a102006-01-18 17:44:10 -0800350MODULE_DESCRIPTION("ECC support for Intel 82860 memory hub controllers");
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700351
352module_param(edac_op_state, int, 0444);
353MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");