blob: e66cdd42a392f5eadeb84bfc20038e3818b835f0 [file] [log] [blame]
Egor Martovetsky7d8536f2007-07-19 01:50:24 -07001/*
2 * Copyright (C) 2006-2007 PA Semi, Inc
3 *
4 * Author: Egor Martovetsky <egor@pasemi.com>
5 * Maintained by: Olof Johansson <olof@lixom.net>
6 *
7 * Driver for the PWRficient onchip memory controllers
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/pci.h>
27#include <linux/pci_ids.h>
28#include <linux/slab.h>
29#include "edac_core.h"
30
31#define MODULE_NAME "pasemi_edac"
32
33#define MCCFG_MCEN 0x300
34#define MCCFG_MCEN_MMC_EN 0x00000001
35#define MCCFG_ERRCOR 0x388
36#define MCCFG_ERRCOR_RNK_FAIL_DET_EN 0x00000100
37#define MCCFG_ERRCOR_ECC_GEN_EN 0x00000010
38#define MCCFG_ERRCOR_ECC_CRR_EN 0x00000001
39#define MCCFG_SCRUB 0x384
40#define MCCFG_SCRUB_RGLR_SCRB_EN 0x00000001
41#define MCDEBUG_ERRCTL1 0x728
42#define MCDEBUG_ERRCTL1_RFL_LOG_EN 0x00080000
43#define MCDEBUG_ERRCTL1_MBE_LOG_EN 0x00040000
44#define MCDEBUG_ERRCTL1_SBE_LOG_EN 0x00020000
45#define MCDEBUG_ERRSTA 0x730
46#define MCDEBUG_ERRSTA_RFL_STATUS 0x00000004
47#define MCDEBUG_ERRSTA_MBE_STATUS 0x00000002
48#define MCDEBUG_ERRSTA_SBE_STATUS 0x00000001
49#define MCDEBUG_ERRCNT1 0x734
50#define MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO 0x00000080
51#define MCDEBUG_ERRLOG1A 0x738
52#define MCDEBUG_ERRLOG1A_MERR_TYPE_M 0x30000000
53#define MCDEBUG_ERRLOG1A_MERR_TYPE_NONE 0x00000000
54#define MCDEBUG_ERRLOG1A_MERR_TYPE_SBE 0x10000000
55#define MCDEBUG_ERRLOG1A_MERR_TYPE_MBE 0x20000000
56#define MCDEBUG_ERRLOG1A_MERR_TYPE_RFL 0x30000000
57#define MCDEBUG_ERRLOG1A_MERR_BA_M 0x00700000
58#define MCDEBUG_ERRLOG1A_MERR_BA_S 20
59#define MCDEBUG_ERRLOG1A_MERR_CS_M 0x00070000
60#define MCDEBUG_ERRLOG1A_MERR_CS_S 16
61#define MCDEBUG_ERRLOG1A_SYNDROME_M 0x0000ffff
62#define MCDRAM_RANKCFG 0x114
63#define MCDRAM_RANKCFG_EN 0x00000001
64#define MCDRAM_RANKCFG_TYPE_SIZE_M 0x000001c0
65#define MCDRAM_RANKCFG_TYPE_SIZE_S 6
66
67#define PASEMI_EDAC_NR_CSROWS 8
68#define PASEMI_EDAC_NR_CHANS 1
69#define PASEMI_EDAC_ERROR_GRAIN 64
70
71static int last_page_in_mmc;
72static int system_mmc_id;
73
74
75static u32 pasemi_edac_get_error_info(struct mem_ctl_info *mci)
76{
77 struct pci_dev *pdev = to_pci_dev(mci->dev);
78 u32 tmp;
79
80 pci_read_config_dword(pdev, MCDEBUG_ERRSTA,
81 &tmp);
82
83 tmp &= (MCDEBUG_ERRSTA_RFL_STATUS | MCDEBUG_ERRSTA_MBE_STATUS
84 | MCDEBUG_ERRSTA_SBE_STATUS);
85
86 if (tmp) {
87 if (tmp & MCDEBUG_ERRSTA_SBE_STATUS)
88 pci_write_config_dword(pdev, MCDEBUG_ERRCNT1,
89 MCDEBUG_ERRCNT1_SBE_CNT_OVRFLO);
90 pci_write_config_dword(pdev, MCDEBUG_ERRSTA, tmp);
91 }
92
93 return tmp;
94}
95
96static void pasemi_edac_process_error_info(struct mem_ctl_info *mci, u32 errsta)
97{
98 struct pci_dev *pdev = to_pci_dev(mci->dev);
99 u32 errlog1a;
100 u32 cs;
101
102 if (!errsta)
103 return;
104
105 pci_read_config_dword(pdev, MCDEBUG_ERRLOG1A, &errlog1a);
106
107 cs = (errlog1a & MCDEBUG_ERRLOG1A_MERR_CS_M) >>
108 MCDEBUG_ERRLOG1A_MERR_CS_S;
109
110 /* uncorrectable/multi-bit errors */
111 if (errsta & (MCDEBUG_ERRSTA_MBE_STATUS |
112 MCDEBUG_ERRSTA_RFL_STATUS)) {
113 edac_mc_handle_ue(mci, mci->csrows[cs].first_page, 0,
114 cs, mci->ctl_name);
115 }
116
117 /* correctable/single-bit errors */
118 if (errsta & MCDEBUG_ERRSTA_SBE_STATUS) {
119 edac_mc_handle_ce(mci, mci->csrows[cs].first_page, 0,
120 0, cs, 0, mci->ctl_name);
121 }
122}
123
124static void pasemi_edac_check(struct mem_ctl_info *mci)
125{
126 u32 errsta;
127
128 errsta = pasemi_edac_get_error_info(mci);
129 if (errsta)
130 pasemi_edac_process_error_info(mci, errsta);
131}
132
133static int pasemi_edac_init_csrows(struct mem_ctl_info *mci,
134 struct pci_dev *pdev,
135 enum edac_type edac_mode)
136{
137 struct csrow_info *csrow;
138 u32 rankcfg;
139 int index;
140
141 for (index = 0; index < mci->nr_csrows; index++) {
142 csrow = &mci->csrows[index];
143
144 pci_read_config_dword(pdev,
145 MCDRAM_RANKCFG + (index * 12),
146 &rankcfg);
147
148 if (!(rankcfg & MCDRAM_RANKCFG_EN))
149 continue;
150
151 switch ((rankcfg & MCDRAM_RANKCFG_TYPE_SIZE_M) >>
152 MCDRAM_RANKCFG_TYPE_SIZE_S) {
153 case 0:
154 csrow->nr_pages = 128 << (20 - PAGE_SHIFT);
155 break;
156 case 1:
157 csrow->nr_pages = 256 << (20 - PAGE_SHIFT);
158 break;
159 case 2:
160 case 3:
161 csrow->nr_pages = 512 << (20 - PAGE_SHIFT);
162 break;
163 case 4:
164 csrow->nr_pages = 1024 << (20 - PAGE_SHIFT);
165 break;
166 case 5:
167 csrow->nr_pages = 2048 << (20 - PAGE_SHIFT);
168 break;
169 default:
170 edac_mc_printk(mci, KERN_ERR,
171 "Unrecognized Rank Config. rankcfg=%u\n",
172 rankcfg);
173 return -EINVAL;
174 }
175
176 csrow->first_page = last_page_in_mmc;
177 csrow->last_page = csrow->first_page + csrow->nr_pages - 1;
178 last_page_in_mmc += csrow->nr_pages;
179 csrow->page_mask = 0;
180 csrow->grain = PASEMI_EDAC_ERROR_GRAIN;
181 csrow->mtype = MEM_DDR;
182 csrow->dtype = DEV_UNKNOWN;
183 csrow->edac_mode = edac_mode;
184 }
185 return 0;
186}
187
188static int __devinit pasemi_edac_probe(struct pci_dev *pdev,
189 const struct pci_device_id *ent)
190{
191 struct mem_ctl_info *mci = NULL;
192 u32 errctl1, errcor, scrub, mcen;
193
194 pci_read_config_dword(pdev, MCCFG_MCEN, &mcen);
195 if (!(mcen & MCCFG_MCEN_MMC_EN))
196 return -ENODEV;
197
198 /*
199 * We should think about enabling other error detection later on
200 */
201
202 pci_read_config_dword(pdev, MCDEBUG_ERRCTL1, &errctl1);
203 errctl1 |= MCDEBUG_ERRCTL1_SBE_LOG_EN |
204 MCDEBUG_ERRCTL1_MBE_LOG_EN |
205 MCDEBUG_ERRCTL1_RFL_LOG_EN;
206 pci_write_config_dword(pdev, MCDEBUG_ERRCTL1, errctl1);
207
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700208 mci = edac_mc_alloc(0, PASEMI_EDAC_NR_CSROWS, PASEMI_EDAC_NR_CHANS,
209 system_mmc_id++);
Egor Martovetsky7d8536f2007-07-19 01:50:24 -0700210
211 if (mci == NULL)
212 return -ENOMEM;
213
214 pci_read_config_dword(pdev, MCCFG_ERRCOR, &errcor);
215 errcor |= MCCFG_ERRCOR_RNK_FAIL_DET_EN |
216 MCCFG_ERRCOR_ECC_GEN_EN |
217 MCCFG_ERRCOR_ECC_CRR_EN;
218
219 mci->dev = &pdev->dev;
220 mci->mtype_cap = MEM_FLAG_DDR | MEM_FLAG_RDDR;
221 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED;
222 mci->edac_cap = (errcor & MCCFG_ERRCOR_ECC_GEN_EN) ?
223 ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ?
224 (EDAC_FLAG_EC | EDAC_FLAG_SECDED) : EDAC_FLAG_EC) :
225 EDAC_FLAG_NONE;
226 mci->mod_name = MODULE_NAME;
227 mci->dev_name = pci_name(pdev);
228 mci->ctl_name = "pasemi,1682m-mc";
229 mci->edac_check = pasemi_edac_check;
230 mci->ctl_page_to_phys = NULL;
231 pci_read_config_dword(pdev, MCCFG_SCRUB, &scrub);
232 mci->scrub_cap = SCRUB_FLAG_HW_PROG | SCRUB_FLAG_HW_SRC;
233 mci->scrub_mode =
234 ((errcor & MCCFG_ERRCOR_ECC_CRR_EN) ? SCRUB_FLAG_HW_SRC : 0) |
235 ((scrub & MCCFG_SCRUB_RGLR_SCRB_EN) ? SCRUB_FLAG_HW_PROG : 0);
236
237 if (pasemi_edac_init_csrows(mci, pdev,
238 (mci->edac_cap & EDAC_FLAG_SECDED) ?
239 EDAC_SECDED :
240 ((mci->edac_cap & EDAC_FLAG_EC) ?
241 EDAC_EC : EDAC_NONE)))
242 goto fail;
243
244 /*
245 * Clear status
246 */
247 pasemi_edac_get_error_info(mci);
248
Doug Thompsonb8f6f972007-07-19 01:50:26 -0700249 if (edac_mc_add_mc(mci))
Egor Martovetsky7d8536f2007-07-19 01:50:24 -0700250 goto fail;
251
252 /* get this far and it's successful */
253 return 0;
254
255fail:
256 edac_mc_free(mci);
257 return -ENODEV;
258}
259
260static void __devexit pasemi_edac_remove(struct pci_dev *pdev)
261{
262 struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev);
263
264 if (!mci)
265 return;
266
267 edac_mc_free(mci);
268}
269
270
271static const struct pci_device_id pasemi_edac_pci_tbl[] = {
272 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa00a) },
273};
274
275MODULE_DEVICE_TABLE(pci, pasemi_edac_pci_tbl);
276
277static struct pci_driver pasemi_edac_driver = {
278 .name = MODULE_NAME,
279 .probe = pasemi_edac_probe,
280 .remove = __devexit_p(pasemi_edac_remove),
281 .id_table = pasemi_edac_pci_tbl,
282};
283
284static int __init pasemi_edac_init(void)
285{
286 return pci_register_driver(&pasemi_edac_driver);
287}
288
289static void __exit pasemi_edac_exit(void)
290{
291 pci_unregister_driver(&pasemi_edac_driver);
292}
293
294module_init(pasemi_edac_init);
295module_exit(pasemi_edac_exit);
296
297MODULE_LICENSE("GPL");
298MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>");
299MODULE_DESCRIPTION("MC support for PA Semi PA6T-1682M memory controller");