blob: 3eb77845cfca8ed2acea13eb9b972eaf7ffeec3f [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
Michal Marek152ba392011-04-01 12:41:20 +020019#define I82860_REVISION " Ver: 2.0.2"
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;
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300143 struct dimm_info *dimm;
Doug Thompson13189522006-06-30 01:56:08 -0700144 int index;
145
146 pci_read_config_word(pdev, I82860_MCHCFG, &mchcfg_ddim);
147 mchcfg_ddim = mchcfg_ddim & 0x180;
148 last_cumul_size = 0;
149
150 /* The group row boundary (GRA) reg values are boundary address
151 * for each DRAM row with a granularity of 16MB. GRA regs are
152 * cumulative; therefore GRA15 will contain the total memory contained
153 * in all eight rows.
154 */
155 for (index = 0; index < mci->nr_csrows; index++) {
156 csrow = &mci->csrows[index];
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300157 dimm = csrow->channels[0].dimm;
158
Doug Thompson13189522006-06-30 01:56:08 -0700159 pci_read_config_word(pdev, I82860_GBA + index * 2, &value);
160 cumul_size = (value & I82860_GBA_MASK) <<
Douglas Thompson052dfb42007-07-19 01:50:13 -0700161 (I82860_GBA_SHIFT - PAGE_SHIFT);
Doug Thompson13189522006-06-30 01:56:08 -0700162 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
163 cumul_size);
164
165 if (cumul_size == last_cumul_size)
166 continue; /* not populated */
167
168 csrow->first_page = last_cumul_size;
169 csrow->last_page = cumul_size - 1;
170 csrow->nr_pages = cumul_size - last_cumul_size;
171 last_cumul_size = cumul_size;
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300172 dimm->grain = 1 << 12; /* I82860_EAP has 4KiB reolution */
173 dimm->mtype = MEM_RMBS;
174 dimm->dtype = DEV_UNKNOWN;
175 dimm->edac_mode = mchcfg_ddim ? EDAC_SECDED : EDAC_NONE;
Doug Thompson13189522006-06-30 01:56:08 -0700176 }
177}
178
Alan Cox0d88a102006-01-18 17:44:10 -0800179static int i82860_probe1(struct pci_dev *pdev, int dev_idx)
180{
Doug Thompson13189522006-06-30 01:56:08 -0700181 struct mem_ctl_info *mci;
Dave Peterson749ede52006-03-26 01:38:45 -0800182 struct i82860_error_info discard;
Alan Cox0d88a102006-01-18 17:44:10 -0800183
Alan Cox0d88a102006-01-18 17:44:10 -0800184 /* RDRAM has channels but these don't map onto the abstractions that
185 edac uses.
186 The device groups from the GRA registers seem to map reasonably
187 well onto the notion of a chip select row.
188 There are 16 GRA registers and since the name is associated with
189 the channel and the GRA registers map to physical devices so we are
190 going to make 1 channel for group.
191 */
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700192 mci = edac_mc_alloc(0, 16, 1, 0);
Dave Petersone7ecd892006-03-26 01:38:52 -0800193
Alan Cox0d88a102006-01-18 17:44:10 -0800194 if (!mci)
195 return -ENOMEM;
196
Dave Peterson537fba22006-03-26 01:38:40 -0800197 debugf3("%s(): init mci\n", __func__);
Doug Thompson37f04582006-06-30 01:56:07 -0700198 mci->dev = &pdev->dev;
Alan Cox0d88a102006-01-18 17:44:10 -0800199 mci->mtype_cap = MEM_FLAG_DDR;
Alan Cox0d88a102006-01-18 17:44:10 -0800200 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
201 /* I"m not sure about this but I think that all RDRAM is SECDED */
202 mci->edac_cap = EDAC_FLAG_SECDED;
Dave Peterson680cbbb2006-03-26 01:38:41 -0800203 mci->mod_name = EDAC_MOD_STR;
Doug Thompson37f04582006-06-30 01:56:07 -0700204 mci->mod_ver = I82860_REVISION;
Alan Cox0d88a102006-01-18 17:44:10 -0800205 mci->ctl_name = i82860_devs[dev_idx].ctl_name;
Dave Jiangc4192702007-07-19 01:49:47 -0700206 mci->dev_name = pci_name(pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800207 mci->edac_check = i82860_check;
208 mci->ctl_page_to_phys = NULL;
Doug Thompson13189522006-06-30 01:56:08 -0700209 i82860_init_csrows(mci, pdev);
Dave Jiangb4e8b372007-07-19 01:50:04 -0700210 i82860_get_error_info(mci, &discard); /* clear counters */
Alan Cox0d88a102006-01-18 17:44:10 -0800211
Doug Thompson2d7bbb92006-06-30 01:56:08 -0700212 /* Here we assume that we will never see multiple instances of this
213 * type of memory controller. The ID is therefore hardcoded to 0.
214 */
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700215 if (edac_mc_add_mc(mci)) {
Dave Peterson537fba22006-03-26 01:38:40 -0800216 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
Doug Thompson13189522006-06-30 01:56:08 -0700217 goto fail;
Alan Cox0d88a102006-01-18 17:44:10 -0800218 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800219
Dave Jiang456a2f92007-07-19 01:50:10 -0700220 /* allocating generic PCI control info */
221 i82860_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
222 if (!i82860_pci) {
223 printk(KERN_WARNING
224 "%s(): Unable to create PCI control\n",
225 __func__);
226 printk(KERN_WARNING
227 "%s(): PCI error report via EDAC not setup\n",
228 __func__);
229 }
230
Doug Thompson13189522006-06-30 01:56:08 -0700231 /* get this far and it's successful */
232 debugf3("%s(): success\n", __func__);
233
234 return 0;
235
Douglas Thompson052dfb42007-07-19 01:50:13 -0700236fail:
Doug Thompson13189522006-06-30 01:56:08 -0700237 edac_mc_free(mci);
238 return -ENODEV;
Alan Cox0d88a102006-01-18 17:44:10 -0800239}
240
241/* returns count (>= 0), or negative on error */
242static int __devinit i82860_init_one(struct pci_dev *pdev,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700243 const struct pci_device_id *ent)
Alan Cox0d88a102006-01-18 17:44:10 -0800244{
245 int rc;
246
Dave Peterson537fba22006-03-26 01:38:40 -0800247 debugf0("%s()\n", __func__);
Dave Peterson537fba22006-03-26 01:38:40 -0800248 i82860_printk(KERN_INFO, "i82860 init one\n");
Dave Petersone7ecd892006-03-26 01:38:52 -0800249
250 if (pci_enable_device(pdev) < 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800251 return -EIO;
Dave Petersone7ecd892006-03-26 01:38:52 -0800252
Alan Cox0d88a102006-01-18 17:44:10 -0800253 rc = i82860_probe1(pdev, ent->driver_data);
Dave Petersone7ecd892006-03-26 01:38:52 -0800254
255 if (rc == 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800256 mci_pdev = pci_dev_get(pdev);
Dave Petersone7ecd892006-03-26 01:38:52 -0800257
Alan Cox0d88a102006-01-18 17:44:10 -0800258 return rc;
259}
260
261static void __devexit i82860_remove_one(struct pci_dev *pdev)
262{
263 struct mem_ctl_info *mci;
264
Dave Peterson537fba22006-03-26 01:38:40 -0800265 debugf0("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800266
Dave Jiang456a2f92007-07-19 01:50:10 -0700267 if (i82860_pci)
268 edac_pci_release_generic_ctl(i82860_pci);
269
Doug Thompson37f04582006-06-30 01:56:07 -0700270 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
Dave Peterson18dbc332006-03-26 01:38:50 -0800271 return;
272
273 edac_mc_free(mci);
Alan Cox0d88a102006-01-18 17:44:10 -0800274}
275
Lionel Debroux36c46f32012-02-27 07:41:47 +0100276static DEFINE_PCI_DEVICE_TABLE(i82860_pci_tbl) = {
Dave Petersone7ecd892006-03-26 01:38:52 -0800277 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700278 PCI_VEND_DEV(INTEL, 82860_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
279 I82860},
Dave Petersone7ecd892006-03-26 01:38:52 -0800280 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700281 0,
282 } /* 0 terminated list. */
Alan Cox0d88a102006-01-18 17:44:10 -0800283};
284
285MODULE_DEVICE_TABLE(pci, i82860_pci_tbl);
286
287static struct pci_driver i82860_driver = {
Dave Peterson680cbbb2006-03-26 01:38:41 -0800288 .name = EDAC_MOD_STR,
Alan Cox0d88a102006-01-18 17:44:10 -0800289 .probe = i82860_init_one,
290 .remove = __devexit_p(i82860_remove_one),
291 .id_table = i82860_pci_tbl,
292};
293
Alan Coxda9bb1d2006-01-18 17:44:13 -0800294static int __init i82860_init(void)
Alan Cox0d88a102006-01-18 17:44:10 -0800295{
296 int pci_rc;
297
Dave Peterson537fba22006-03-26 01:38:40 -0800298 debugf3("%s()\n", __func__);
Dave Petersone7ecd892006-03-26 01:38:52 -0800299
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700300 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
301 opstate_init();
302
Alan Cox0d88a102006-01-18 17:44:10 -0800303 if ((pci_rc = pci_register_driver(&i82860_driver)) < 0)
Dave Petersone8a491b2006-03-26 01:38:43 -0800304 goto fail0;
Alan Cox0d88a102006-01-18 17:44:10 -0800305
306 if (!mci_pdev) {
Alan Cox0d88a102006-01-18 17:44:10 -0800307 mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700308 PCI_DEVICE_ID_INTEL_82860_0, NULL);
Dave Petersone7ecd892006-03-26 01:38:52 -0800309
Alan Cox0d88a102006-01-18 17:44:10 -0800310 if (mci_pdev == NULL) {
311 debugf0("860 pci_get_device fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800312 pci_rc = -ENODEV;
313 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800314 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800315
Alan Cox0d88a102006-01-18 17:44:10 -0800316 pci_rc = i82860_init_one(mci_pdev, i82860_pci_tbl);
Dave Petersone7ecd892006-03-26 01:38:52 -0800317
Alan Cox0d88a102006-01-18 17:44:10 -0800318 if (pci_rc < 0) {
319 debugf0("860 init fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800320 pci_rc = -ENODEV;
321 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800322 }
323 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800324
Alan Cox0d88a102006-01-18 17:44:10 -0800325 return 0;
Dave Petersone8a491b2006-03-26 01:38:43 -0800326
Douglas Thompson052dfb42007-07-19 01:50:13 -0700327fail1:
Dave Petersone8a491b2006-03-26 01:38:43 -0800328 pci_unregister_driver(&i82860_driver);
329
Douglas Thompson052dfb42007-07-19 01:50:13 -0700330fail0:
Dave Petersone8a491b2006-03-26 01:38:43 -0800331 if (mci_pdev != NULL)
332 pci_dev_put(mci_pdev);
333
334 return pci_rc;
Alan Cox0d88a102006-01-18 17:44:10 -0800335}
336
337static void __exit i82860_exit(void)
338{
Dave Peterson537fba22006-03-26 01:38:40 -0800339 debugf3("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800340
341 pci_unregister_driver(&i82860_driver);
Dave Petersone8a491b2006-03-26 01:38:43 -0800342
343 if (mci_pdev != NULL)
Alan Cox0d88a102006-01-18 17:44:10 -0800344 pci_dev_put(mci_pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800345}
346
347module_init(i82860_init);
348module_exit(i82860_exit);
349
350MODULE_LICENSE("GPL");
Dave Petersone7ecd892006-03-26 01:38:52 -0800351MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com) "
Douglas Thompson052dfb42007-07-19 01:50:13 -0700352 "Ben Woodard <woodard@redhat.com>");
Alan Cox0d88a102006-01-18 17:44:10 -0800353MODULE_DESCRIPTION("ECC support for Intel 82860 memory hub controllers");
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700354
355module_param(edac_op_state, int, 0444);
356MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");