blob: 8834e4ed980215a7230f1a95284e9b4f5a96c345 [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{
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300102 struct dimm_info *dimm;
Alan Cox0d88a102006-01-18 17:44:10 -0800103 int row;
104
105 if (!(info->errsts2 & 0x0003))
106 return 0;
107
108 if (!handle_errors)
109 return 1;
110
111 if ((info->errsts ^ info->errsts2) & 0x0003) {
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300112 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 0, 0, 0,
113 -1, -1, -1, "UE overwrote CE", "", NULL);
Alan Cox0d88a102006-01-18 17:44:10 -0800114 info->errsts = info->errsts2;
115 }
116
117 info->eap >>= PAGE_SHIFT;
118 row = edac_mc_find_csrow_by_page(mci, info->eap);
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300119 dimm = mci->csrows[row].channels[0].dimm;
Alan Cox0d88a102006-01-18 17:44:10 -0800120
121 if (info->errsts & 0x0002)
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300122 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
123 info->eap, 0, 0,
124 dimm->location[0], dimm->location[1], -1,
125 "i82860 UE", "", NULL);
Alan Cox0d88a102006-01-18 17:44:10 -0800126 else
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300127 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
128 info->eap, 0, info->derrsyn,
129 dimm->location[0], dimm->location[1], -1,
130 "i82860 CE", "", NULL);
Alan Cox0d88a102006-01-18 17:44:10 -0800131
132 return 1;
133}
134
135static void i82860_check(struct mem_ctl_info *mci)
136{
137 struct i82860_error_info info;
138
Dave Peterson537fba22006-03-26 01:38:40 -0800139 debugf1("MC%d: %s()\n", mci->mc_idx, __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800140 i82860_get_error_info(mci, &info);
141 i82860_process_error_info(mci, &info, 1);
142}
143
Doug Thompson13189522006-06-30 01:56:08 -0700144static void i82860_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev)
145{
146 unsigned long last_cumul_size;
Dave Jiangb4e8b372007-07-19 01:50:04 -0700147 u16 mchcfg_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */
Doug Thompson13189522006-06-30 01:56:08 -0700148 u16 value;
149 u32 cumul_size;
150 struct csrow_info *csrow;
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300151 struct dimm_info *dimm;
Doug Thompson13189522006-06-30 01:56:08 -0700152 int index;
153
154 pci_read_config_word(pdev, I82860_MCHCFG, &mchcfg_ddim);
155 mchcfg_ddim = mchcfg_ddim & 0x180;
156 last_cumul_size = 0;
157
158 /* The group row boundary (GRA) reg values are boundary address
159 * for each DRAM row with a granularity of 16MB. GRA regs are
160 * cumulative; therefore GRA15 will contain the total memory contained
161 * in all eight rows.
162 */
163 for (index = 0; index < mci->nr_csrows; index++) {
164 csrow = &mci->csrows[index];
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300165 dimm = csrow->channels[0].dimm;
166
Doug Thompson13189522006-06-30 01:56:08 -0700167 pci_read_config_word(pdev, I82860_GBA + index * 2, &value);
168 cumul_size = (value & I82860_GBA_MASK) <<
Douglas Thompson052dfb42007-07-19 01:50:13 -0700169 (I82860_GBA_SHIFT - PAGE_SHIFT);
Doug Thompson13189522006-06-30 01:56:08 -0700170 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
171 cumul_size);
172
173 if (cumul_size == last_cumul_size)
174 continue; /* not populated */
175
176 csrow->first_page = last_cumul_size;
177 csrow->last_page = cumul_size - 1;
Mauro Carvalho Chehaba895bf82012-01-28 09:09:38 -0300178 dimm->nr_pages = cumul_size - last_cumul_size;
Doug Thompson13189522006-06-30 01:56:08 -0700179 last_cumul_size = cumul_size;
Mauro Carvalho Chehab084a4fc2012-01-27 18:38:08 -0300180 dimm->grain = 1 << 12; /* I82860_EAP has 4KiB reolution */
181 dimm->mtype = MEM_RMBS;
182 dimm->dtype = DEV_UNKNOWN;
183 dimm->edac_mode = mchcfg_ddim ? EDAC_SECDED : EDAC_NONE;
Doug Thompson13189522006-06-30 01:56:08 -0700184 }
185}
186
Alan Cox0d88a102006-01-18 17:44:10 -0800187static int i82860_probe1(struct pci_dev *pdev, int dev_idx)
188{
Doug Thompson13189522006-06-30 01:56:08 -0700189 struct mem_ctl_info *mci;
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300190 struct edac_mc_layer layers[2];
Dave Peterson749ede52006-03-26 01:38:45 -0800191 struct i82860_error_info discard;
Alan Cox0d88a102006-01-18 17:44:10 -0800192
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300193 /*
194 * RDRAM has channels but these don't map onto the csrow abstraction.
195 * According with the datasheet, there are 2 Rambus channels, supporting
196 * up to 16 direct RDRAM devices.
197 * The device groups from the GRA registers seem to map reasonably
198 * well onto the notion of a chip select row.
199 * There are 16 GRA registers and since the name is associated with
200 * the channel and the GRA registers map to physical devices so we are
201 * going to make 1 channel for group.
Alan Cox0d88a102006-01-18 17:44:10 -0800202 */
Mauro Carvalho Chehab84c3a682012-04-16 15:10:31 -0300203 layers[0].type = EDAC_MC_LAYER_CHANNEL;
204 layers[0].size = 2;
205 layers[0].is_virt_csrow = true;
206 layers[1].type = EDAC_MC_LAYER_SLOT;
207 layers[1].size = 8;
208 layers[1].is_virt_csrow = true;
209 mci = new_edac_mc_alloc(0, ARRAY_SIZE(layers), layers, 0);
Alan Cox0d88a102006-01-18 17:44:10 -0800210 if (!mci)
211 return -ENOMEM;
212
Dave Peterson537fba22006-03-26 01:38:40 -0800213 debugf3("%s(): init mci\n", __func__);
Doug Thompson37f04582006-06-30 01:56:07 -0700214 mci->dev = &pdev->dev;
Alan Cox0d88a102006-01-18 17:44:10 -0800215 mci->mtype_cap = MEM_FLAG_DDR;
Alan Cox0d88a102006-01-18 17:44:10 -0800216 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
217 /* I"m not sure about this but I think that all RDRAM is SECDED */
218 mci->edac_cap = EDAC_FLAG_SECDED;
Dave Peterson680cbbb2006-03-26 01:38:41 -0800219 mci->mod_name = EDAC_MOD_STR;
Doug Thompson37f04582006-06-30 01:56:07 -0700220 mci->mod_ver = I82860_REVISION;
Alan Cox0d88a102006-01-18 17:44:10 -0800221 mci->ctl_name = i82860_devs[dev_idx].ctl_name;
Dave Jiangc4192702007-07-19 01:49:47 -0700222 mci->dev_name = pci_name(pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800223 mci->edac_check = i82860_check;
224 mci->ctl_page_to_phys = NULL;
Doug Thompson13189522006-06-30 01:56:08 -0700225 i82860_init_csrows(mci, pdev);
Dave Jiangb4e8b372007-07-19 01:50:04 -0700226 i82860_get_error_info(mci, &discard); /* clear counters */
Alan Cox0d88a102006-01-18 17:44:10 -0800227
Doug Thompson2d7bbb92006-06-30 01:56:08 -0700228 /* Here we assume that we will never see multiple instances of this
229 * type of memory controller. The ID is therefore hardcoded to 0.
230 */
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700231 if (edac_mc_add_mc(mci)) {
Dave Peterson537fba22006-03-26 01:38:40 -0800232 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
Doug Thompson13189522006-06-30 01:56:08 -0700233 goto fail;
Alan Cox0d88a102006-01-18 17:44:10 -0800234 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800235
Dave Jiang456a2f92007-07-19 01:50:10 -0700236 /* allocating generic PCI control info */
237 i82860_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
238 if (!i82860_pci) {
239 printk(KERN_WARNING
240 "%s(): Unable to create PCI control\n",
241 __func__);
242 printk(KERN_WARNING
243 "%s(): PCI error report via EDAC not setup\n",
244 __func__);
245 }
246
Doug Thompson13189522006-06-30 01:56:08 -0700247 /* get this far and it's successful */
248 debugf3("%s(): success\n", __func__);
249
250 return 0;
251
Douglas Thompson052dfb42007-07-19 01:50:13 -0700252fail:
Doug Thompson13189522006-06-30 01:56:08 -0700253 edac_mc_free(mci);
254 return -ENODEV;
Alan Cox0d88a102006-01-18 17:44:10 -0800255}
256
257/* returns count (>= 0), or negative on error */
258static int __devinit i82860_init_one(struct pci_dev *pdev,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700259 const struct pci_device_id *ent)
Alan Cox0d88a102006-01-18 17:44:10 -0800260{
261 int rc;
262
Dave Peterson537fba22006-03-26 01:38:40 -0800263 debugf0("%s()\n", __func__);
Dave Peterson537fba22006-03-26 01:38:40 -0800264 i82860_printk(KERN_INFO, "i82860 init one\n");
Dave Petersone7ecd892006-03-26 01:38:52 -0800265
266 if (pci_enable_device(pdev) < 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800267 return -EIO;
Dave Petersone7ecd892006-03-26 01:38:52 -0800268
Alan Cox0d88a102006-01-18 17:44:10 -0800269 rc = i82860_probe1(pdev, ent->driver_data);
Dave Petersone7ecd892006-03-26 01:38:52 -0800270
271 if (rc == 0)
Alan Cox0d88a102006-01-18 17:44:10 -0800272 mci_pdev = pci_dev_get(pdev);
Dave Petersone7ecd892006-03-26 01:38:52 -0800273
Alan Cox0d88a102006-01-18 17:44:10 -0800274 return rc;
275}
276
277static void __devexit i82860_remove_one(struct pci_dev *pdev)
278{
279 struct mem_ctl_info *mci;
280
Dave Peterson537fba22006-03-26 01:38:40 -0800281 debugf0("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800282
Dave Jiang456a2f92007-07-19 01:50:10 -0700283 if (i82860_pci)
284 edac_pci_release_generic_ctl(i82860_pci);
285
Doug Thompson37f04582006-06-30 01:56:07 -0700286 if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
Dave Peterson18dbc332006-03-26 01:38:50 -0800287 return;
288
289 edac_mc_free(mci);
Alan Cox0d88a102006-01-18 17:44:10 -0800290}
291
Lionel Debroux36c46f32012-02-27 07:41:47 +0100292static DEFINE_PCI_DEVICE_TABLE(i82860_pci_tbl) = {
Dave Petersone7ecd892006-03-26 01:38:52 -0800293 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700294 PCI_VEND_DEV(INTEL, 82860_0), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
295 I82860},
Dave Petersone7ecd892006-03-26 01:38:52 -0800296 {
Dave Jiangb4e8b372007-07-19 01:50:04 -0700297 0,
298 } /* 0 terminated list. */
Alan Cox0d88a102006-01-18 17:44:10 -0800299};
300
301MODULE_DEVICE_TABLE(pci, i82860_pci_tbl);
302
303static struct pci_driver i82860_driver = {
Dave Peterson680cbbb2006-03-26 01:38:41 -0800304 .name = EDAC_MOD_STR,
Alan Cox0d88a102006-01-18 17:44:10 -0800305 .probe = i82860_init_one,
306 .remove = __devexit_p(i82860_remove_one),
307 .id_table = i82860_pci_tbl,
308};
309
Alan Coxda9bb1d2006-01-18 17:44:13 -0800310static int __init i82860_init(void)
Alan Cox0d88a102006-01-18 17:44:10 -0800311{
312 int pci_rc;
313
Dave Peterson537fba22006-03-26 01:38:40 -0800314 debugf3("%s()\n", __func__);
Dave Petersone7ecd892006-03-26 01:38:52 -0800315
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700316 /* Ensure that the OPSTATE is set correctly for POLL or NMI */
317 opstate_init();
318
Alan Cox0d88a102006-01-18 17:44:10 -0800319 if ((pci_rc = pci_register_driver(&i82860_driver)) < 0)
Dave Petersone8a491b2006-03-26 01:38:43 -0800320 goto fail0;
Alan Cox0d88a102006-01-18 17:44:10 -0800321
322 if (!mci_pdev) {
Alan Cox0d88a102006-01-18 17:44:10 -0800323 mci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
Douglas Thompson052dfb42007-07-19 01:50:13 -0700324 PCI_DEVICE_ID_INTEL_82860_0, NULL);
Dave Petersone7ecd892006-03-26 01:38:52 -0800325
Alan Cox0d88a102006-01-18 17:44:10 -0800326 if (mci_pdev == NULL) {
327 debugf0("860 pci_get_device fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800328 pci_rc = -ENODEV;
329 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800330 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800331
Alan Cox0d88a102006-01-18 17:44:10 -0800332 pci_rc = i82860_init_one(mci_pdev, i82860_pci_tbl);
Dave Petersone7ecd892006-03-26 01:38:52 -0800333
Alan Cox0d88a102006-01-18 17:44:10 -0800334 if (pci_rc < 0) {
335 debugf0("860 init fail\n");
Dave Petersone8a491b2006-03-26 01:38:43 -0800336 pci_rc = -ENODEV;
337 goto fail1;
Alan Cox0d88a102006-01-18 17:44:10 -0800338 }
339 }
Dave Petersone7ecd892006-03-26 01:38:52 -0800340
Alan Cox0d88a102006-01-18 17:44:10 -0800341 return 0;
Dave Petersone8a491b2006-03-26 01:38:43 -0800342
Douglas Thompson052dfb42007-07-19 01:50:13 -0700343fail1:
Dave Petersone8a491b2006-03-26 01:38:43 -0800344 pci_unregister_driver(&i82860_driver);
345
Douglas Thompson052dfb42007-07-19 01:50:13 -0700346fail0:
Dave Petersone8a491b2006-03-26 01:38:43 -0800347 if (mci_pdev != NULL)
348 pci_dev_put(mci_pdev);
349
350 return pci_rc;
Alan Cox0d88a102006-01-18 17:44:10 -0800351}
352
353static void __exit i82860_exit(void)
354{
Dave Peterson537fba22006-03-26 01:38:40 -0800355 debugf3("%s()\n", __func__);
Alan Cox0d88a102006-01-18 17:44:10 -0800356
357 pci_unregister_driver(&i82860_driver);
Dave Petersone8a491b2006-03-26 01:38:43 -0800358
359 if (mci_pdev != NULL)
Alan Cox0d88a102006-01-18 17:44:10 -0800360 pci_dev_put(mci_pdev);
Alan Cox0d88a102006-01-18 17:44:10 -0800361}
362
363module_init(i82860_init);
364module_exit(i82860_exit);
365
366MODULE_LICENSE("GPL");
Dave Petersone7ecd892006-03-26 01:38:52 -0800367MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com) "
Douglas Thompson052dfb42007-07-19 01:50:13 -0700368 "Ben Woodard <woodard@redhat.com>");
Alan Cox0d88a102006-01-18 17:44:10 -0800369MODULE_DESCRIPTION("ECC support for Intel 82860 memory hub controllers");
Hitoshi Mitakec3c52bc2008-04-29 01:03:18 -0700370
371module_param(edac_op_state, int, 0444);
372MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");