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7d8536fb EM |
1 | /* |
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 | ||
71 | static int last_page_in_mmc; | |
72 | static int system_mmc_id; | |
73 | ||
74 | ||
75 | static 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 | ||
96 | static 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 | ||
124 | static 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 | ||
133 | static 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 | ||
188 | static 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 | ||
b8f6f975 DT |
208 | mci = edac_mc_alloc(0, PASEMI_EDAC_NR_CSROWS, PASEMI_EDAC_NR_CHANS, |
209 | system_mmc_id++); | |
7d8536fb EM |
210 | |
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 | ||
b8f6f975 | 249 | if (edac_mc_add_mc(mci)) |
7d8536fb EM |
250 | goto fail; |
251 | ||
252 | /* get this far and it's successful */ | |
253 | return 0; | |
254 | ||
255 | fail: | |
256 | edac_mc_free(mci); | |
257 | return -ENODEV; | |
258 | } | |
259 | ||
260 | static 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 | ||
271 | static const struct pci_device_id pasemi_edac_pci_tbl[] = { | |
272 | { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa00a) }, | |
273 | }; | |
274 | ||
275 | MODULE_DEVICE_TABLE(pci, pasemi_edac_pci_tbl); | |
276 | ||
277 | static 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 | ||
284 | static int __init pasemi_edac_init(void) | |
285 | { | |
286 | return pci_register_driver(&pasemi_edac_driver); | |
287 | } | |
288 | ||
289 | static void __exit pasemi_edac_exit(void) | |
290 | { | |
291 | pci_unregister_driver(&pasemi_edac_driver); | |
292 | } | |
293 | ||
294 | module_init(pasemi_edac_init); | |
295 | module_exit(pasemi_edac_exit); | |
296 | ||
297 | MODULE_LICENSE("GPL"); | |
298 | MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); | |
299 | MODULE_DESCRIPTION("MC support for PA Semi PA6T-1682M memory controller"); |