Commit | Line | Data |
---|---|---|
da9bb1d2 AC |
1 | /* |
2 | * MC kernel module | |
3 | * (C) 2003 Linux Networx (http://lnxi.com) | |
4 | * This file may be distributed under the terms of the | |
5 | * GNU General Public License. | |
6 | * | |
7 | * Written by Thayne Harbaugh | |
8 | * Based on work by Dan Hollis <goemon at anime dot net> and others. | |
9 | * http://www.anime.net/~goemon/linux-ecc/ | |
10 | * | |
11 | * NMI handling support added by | |
12 | * Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com> | |
13 | * | |
14 | * $Id: edac_mc.h,v 1.4.2.10 2005/10/05 00:43:44 dsp_llnl Exp $ | |
15 | * | |
16 | */ | |
17 | ||
da9bb1d2 AC |
18 | #ifndef _EDAC_MC_H_ |
19 | #define _EDAC_MC_H_ | |
20 | ||
da9bb1d2 AC |
21 | #include <linux/config.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/smp.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/time.h> | |
29 | #include <linux/nmi.h> | |
30 | #include <linux/rcupdate.h> | |
31 | #include <linux/completion.h> | |
32 | #include <linux/kobject.h> | |
33 | ||
da9bb1d2 AC |
34 | #define EDAC_MC_LABEL_LEN 31 |
35 | #define MC_PROC_NAME_MAX_LEN 7 | |
36 | ||
37 | #if PAGE_SHIFT < 20 | |
38 | #define PAGES_TO_MiB( pages ) ( ( pages ) >> ( 20 - PAGE_SHIFT ) ) | |
39 | #else /* PAGE_SHIFT > 20 */ | |
40 | #define PAGES_TO_MiB( pages ) ( ( pages ) << ( PAGE_SHIFT - 20 ) ) | |
41 | #endif | |
42 | ||
537fba28 | 43 | #define edac_printk(level, prefix, fmt, arg...) \ |
e7ecd891 | 44 | printk(level "EDAC " prefix ": " fmt, ##arg) |
537fba28 DP |
45 | |
46 | #define edac_mc_printk(mci, level, fmt, arg...) \ | |
e7ecd891 | 47 | printk(level "EDAC MC%d: " fmt, mci->mc_idx, ##arg) |
537fba28 DP |
48 | |
49 | #define edac_mc_chipset_printk(mci, level, prefix, fmt, arg...) \ | |
e7ecd891 | 50 | printk(level "EDAC " prefix " MC%d: " fmt, mci->mc_idx, ##arg) |
537fba28 DP |
51 | |
52 | /* prefixes for edac_printk() and edac_mc_printk() */ | |
53 | #define EDAC_MC "MC" | |
54 | #define EDAC_PCI "PCI" | |
55 | #define EDAC_DEBUG "DEBUG" | |
56 | ||
da9bb1d2 AC |
57 | #ifdef CONFIG_EDAC_DEBUG |
58 | extern int edac_debug_level; | |
537fba28 DP |
59 | |
60 | #define edac_debug_printk(level, fmt, arg...) \ | |
61 | do { \ | |
62 | if (level <= edac_debug_level) \ | |
63 | edac_printk(KERN_DEBUG, EDAC_DEBUG, fmt, ##arg); \ | |
64 | } while(0) | |
65 | ||
da9bb1d2 AC |
66 | #define debugf0( ... ) edac_debug_printk(0, __VA_ARGS__ ) |
67 | #define debugf1( ... ) edac_debug_printk(1, __VA_ARGS__ ) | |
68 | #define debugf2( ... ) edac_debug_printk(2, __VA_ARGS__ ) | |
69 | #define debugf3( ... ) edac_debug_printk(3, __VA_ARGS__ ) | |
70 | #define debugf4( ... ) edac_debug_printk(4, __VA_ARGS__ ) | |
e7ecd891 DP |
71 | |
72 | #else /* !CONFIG_EDAC_DEBUG */ | |
73 | ||
da9bb1d2 AC |
74 | #define debugf0( ... ) |
75 | #define debugf1( ... ) | |
76 | #define debugf2( ... ) | |
77 | #define debugf3( ... ) | |
78 | #define debugf4( ... ) | |
da9bb1d2 | 79 | |
e7ecd891 | 80 | #endif /* !CONFIG_EDAC_DEBUG */ |
da9bb1d2 | 81 | |
680cbbbb DP |
82 | #define edac_xstr(s) edac_str(s) |
83 | #define edac_str(s) #s | |
84 | #define EDAC_MOD_STR edac_xstr(KBUILD_BASENAME) | |
da9bb1d2 AC |
85 | |
86 | #define BIT(x) (1 << (x)) | |
87 | ||
e7ecd891 DP |
88 | #define PCI_VEND_DEV(vend, dev) PCI_VENDOR_ID_ ## vend, \ |
89 | PCI_DEVICE_ID_ ## vend ## _ ## dev | |
da9bb1d2 AC |
90 | |
91 | /* memory devices */ | |
92 | enum dev_type { | |
93 | DEV_UNKNOWN = 0, | |
94 | DEV_X1, | |
95 | DEV_X2, | |
96 | DEV_X4, | |
97 | DEV_X8, | |
98 | DEV_X16, | |
99 | DEV_X32, /* Do these parts exist? */ | |
100 | DEV_X64 /* Do these parts exist? */ | |
101 | }; | |
102 | ||
103 | #define DEV_FLAG_UNKNOWN BIT(DEV_UNKNOWN) | |
104 | #define DEV_FLAG_X1 BIT(DEV_X1) | |
105 | #define DEV_FLAG_X2 BIT(DEV_X2) | |
106 | #define DEV_FLAG_X4 BIT(DEV_X4) | |
107 | #define DEV_FLAG_X8 BIT(DEV_X8) | |
108 | #define DEV_FLAG_X16 BIT(DEV_X16) | |
109 | #define DEV_FLAG_X32 BIT(DEV_X32) | |
110 | #define DEV_FLAG_X64 BIT(DEV_X64) | |
111 | ||
112 | /* memory types */ | |
113 | enum mem_type { | |
114 | MEM_EMPTY = 0, /* Empty csrow */ | |
115 | MEM_RESERVED, /* Reserved csrow type */ | |
116 | MEM_UNKNOWN, /* Unknown csrow type */ | |
117 | MEM_FPM, /* Fast page mode */ | |
118 | MEM_EDO, /* Extended data out */ | |
119 | MEM_BEDO, /* Burst Extended data out */ | |
120 | MEM_SDR, /* Single data rate SDRAM */ | |
121 | MEM_RDR, /* Registered single data rate SDRAM */ | |
122 | MEM_DDR, /* Double data rate SDRAM */ | |
123 | MEM_RDDR, /* Registered Double data rate SDRAM */ | |
124 | MEM_RMBS /* Rambus DRAM */ | |
125 | }; | |
126 | ||
127 | #define MEM_FLAG_EMPTY BIT(MEM_EMPTY) | |
128 | #define MEM_FLAG_RESERVED BIT(MEM_RESERVED) | |
129 | #define MEM_FLAG_UNKNOWN BIT(MEM_UNKNOWN) | |
130 | #define MEM_FLAG_FPM BIT(MEM_FPM) | |
131 | #define MEM_FLAG_EDO BIT(MEM_EDO) | |
132 | #define MEM_FLAG_BEDO BIT(MEM_BEDO) | |
133 | #define MEM_FLAG_SDR BIT(MEM_SDR) | |
134 | #define MEM_FLAG_RDR BIT(MEM_RDR) | |
135 | #define MEM_FLAG_DDR BIT(MEM_DDR) | |
136 | #define MEM_FLAG_RDDR BIT(MEM_RDDR) | |
137 | #define MEM_FLAG_RMBS BIT(MEM_RMBS) | |
138 | ||
da9bb1d2 AC |
139 | /* chipset Error Detection and Correction capabilities and mode */ |
140 | enum edac_type { | |
141 | EDAC_UNKNOWN = 0, /* Unknown if ECC is available */ | |
142 | EDAC_NONE, /* Doesnt support ECC */ | |
143 | EDAC_RESERVED, /* Reserved ECC type */ | |
144 | EDAC_PARITY, /* Detects parity errors */ | |
145 | EDAC_EC, /* Error Checking - no correction */ | |
146 | EDAC_SECDED, /* Single bit error correction, Double detection */ | |
147 | EDAC_S2ECD2ED, /* Chipkill x2 devices - do these exist? */ | |
148 | EDAC_S4ECD4ED, /* Chipkill x4 devices */ | |
149 | EDAC_S8ECD8ED, /* Chipkill x8 devices */ | |
150 | EDAC_S16ECD16ED, /* Chipkill x16 devices */ | |
151 | }; | |
152 | ||
153 | #define EDAC_FLAG_UNKNOWN BIT(EDAC_UNKNOWN) | |
154 | #define EDAC_FLAG_NONE BIT(EDAC_NONE) | |
155 | #define EDAC_FLAG_PARITY BIT(EDAC_PARITY) | |
156 | #define EDAC_FLAG_EC BIT(EDAC_EC) | |
157 | #define EDAC_FLAG_SECDED BIT(EDAC_SECDED) | |
158 | #define EDAC_FLAG_S2ECD2ED BIT(EDAC_S2ECD2ED) | |
159 | #define EDAC_FLAG_S4ECD4ED BIT(EDAC_S4ECD4ED) | |
160 | #define EDAC_FLAG_S8ECD8ED BIT(EDAC_S8ECD8ED) | |
161 | #define EDAC_FLAG_S16ECD16ED BIT(EDAC_S16ECD16ED) | |
162 | ||
da9bb1d2 AC |
163 | /* scrubbing capabilities */ |
164 | enum scrub_type { | |
165 | SCRUB_UNKNOWN = 0, /* Unknown if scrubber is available */ | |
166 | SCRUB_NONE, /* No scrubber */ | |
167 | SCRUB_SW_PROG, /* SW progressive (sequential) scrubbing */ | |
168 | SCRUB_SW_SRC, /* Software scrub only errors */ | |
169 | SCRUB_SW_PROG_SRC, /* Progressive software scrub from an error */ | |
170 | SCRUB_SW_TUNABLE, /* Software scrub frequency is tunable */ | |
171 | SCRUB_HW_PROG, /* HW progressive (sequential) scrubbing */ | |
172 | SCRUB_HW_SRC, /* Hardware scrub only errors */ | |
173 | SCRUB_HW_PROG_SRC, /* Progressive hardware scrub from an error */ | |
174 | SCRUB_HW_TUNABLE /* Hardware scrub frequency is tunable */ | |
175 | }; | |
176 | ||
177 | #define SCRUB_FLAG_SW_PROG BIT(SCRUB_SW_PROG) | |
178 | #define SCRUB_FLAG_SW_SRC BIT(SCRUB_SW_SRC_CORR) | |
179 | #define SCRUB_FLAG_SW_PROG_SRC BIT(SCRUB_SW_PROG_SRC_CORR) | |
180 | #define SCRUB_FLAG_SW_TUN BIT(SCRUB_SW_SCRUB_TUNABLE) | |
181 | #define SCRUB_FLAG_HW_PROG BIT(SCRUB_HW_PROG) | |
182 | #define SCRUB_FLAG_HW_SRC BIT(SCRUB_HW_SRC_CORR) | |
183 | #define SCRUB_FLAG_HW_PROG_SRC BIT(SCRUB_HW_PROG_SRC_CORR) | |
184 | #define SCRUB_FLAG_HW_TUN BIT(SCRUB_HW_TUNABLE) | |
185 | ||
da9bb1d2 AC |
186 | /* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */ |
187 | ||
188 | /* | |
189 | * There are several things to be aware of that aren't at all obvious: | |
190 | * | |
191 | * | |
192 | * SOCKETS, SOCKET SETS, BANKS, ROWS, CHIP-SELECT ROWS, CHANNELS, etc.. | |
193 | * | |
194 | * These are some of the many terms that are thrown about that don't always | |
195 | * mean what people think they mean (Inconceivable!). In the interest of | |
196 | * creating a common ground for discussion, terms and their definitions | |
197 | * will be established. | |
198 | * | |
199 | * Memory devices: The individual chip on a memory stick. These devices | |
200 | * commonly output 4 and 8 bits each. Grouping several | |
201 | * of these in parallel provides 64 bits which is common | |
202 | * for a memory stick. | |
203 | * | |
204 | * Memory Stick: A printed circuit board that agregates multiple | |
205 | * memory devices in parallel. This is the atomic | |
206 | * memory component that is purchaseable by Joe consumer | |
207 | * and loaded into a memory socket. | |
208 | * | |
209 | * Socket: A physical connector on the motherboard that accepts | |
210 | * a single memory stick. | |
211 | * | |
212 | * Channel: Set of memory devices on a memory stick that must be | |
213 | * grouped in parallel with one or more additional | |
214 | * channels from other memory sticks. This parallel | |
215 | * grouping of the output from multiple channels are | |
216 | * necessary for the smallest granularity of memory access. | |
217 | * Some memory controllers are capable of single channel - | |
218 | * which means that memory sticks can be loaded | |
219 | * individually. Other memory controllers are only | |
220 | * capable of dual channel - which means that memory | |
221 | * sticks must be loaded as pairs (see "socket set"). | |
222 | * | |
223 | * Chip-select row: All of the memory devices that are selected together. | |
224 | * for a single, minimum grain of memory access. | |
225 | * This selects all of the parallel memory devices across | |
226 | * all of the parallel channels. Common chip-select rows | |
227 | * for single channel are 64 bits, for dual channel 128 | |
228 | * bits. | |
229 | * | |
230 | * Single-Ranked stick: A Single-ranked stick has 1 chip-select row of memmory. | |
231 | * Motherboards commonly drive two chip-select pins to | |
232 | * a memory stick. A single-ranked stick, will occupy | |
233 | * only one of those rows. The other will be unused. | |
234 | * | |
235 | * Double-Ranked stick: A double-ranked stick has two chip-select rows which | |
236 | * access different sets of memory devices. The two | |
237 | * rows cannot be accessed concurrently. | |
238 | * | |
239 | * Double-sided stick: DEPRECATED TERM, see Double-Ranked stick. | |
240 | * A double-sided stick has two chip-select rows which | |
241 | * access different sets of memory devices. The two | |
242 | * rows cannot be accessed concurrently. "Double-sided" | |
243 | * is irrespective of the memory devices being mounted | |
244 | * on both sides of the memory stick. | |
245 | * | |
246 | * Socket set: All of the memory sticks that are required for for | |
247 | * a single memory access or all of the memory sticks | |
248 | * spanned by a chip-select row. A single socket set | |
249 | * has two chip-select rows and if double-sided sticks | |
250 | * are used these will occupy those chip-select rows. | |
251 | * | |
252 | * Bank: This term is avoided because it is unclear when | |
253 | * needing to distinguish between chip-select rows and | |
254 | * socket sets. | |
255 | * | |
256 | * Controller pages: | |
257 | * | |
258 | * Physical pages: | |
259 | * | |
260 | * Virtual pages: | |
261 | * | |
262 | * | |
263 | * STRUCTURE ORGANIZATION AND CHOICES | |
264 | * | |
265 | * | |
266 | * | |
267 | * PS - I enjoyed writing all that about as much as you enjoyed reading it. | |
268 | */ | |
269 | ||
da9bb1d2 AC |
270 | struct channel_info { |
271 | int chan_idx; /* channel index */ | |
272 | u32 ce_count; /* Correctable Errors for this CHANNEL */ | |
e7ecd891 | 273 | char label[EDAC_MC_LABEL_LEN + 1]; /* DIMM label on motherboard */ |
da9bb1d2 AC |
274 | struct csrow_info *csrow; /* the parent */ |
275 | }; | |
276 | ||
da9bb1d2 AC |
277 | struct csrow_info { |
278 | unsigned long first_page; /* first page number in dimm */ | |
279 | unsigned long last_page; /* last page number in dimm */ | |
280 | unsigned long page_mask; /* used for interleaving - | |
e7ecd891 DP |
281 | * 0UL for non intlv |
282 | */ | |
da9bb1d2 AC |
283 | u32 nr_pages; /* number of pages in csrow */ |
284 | u32 grain; /* granularity of reported error in bytes */ | |
285 | int csrow_idx; /* the chip-select row */ | |
286 | enum dev_type dtype; /* memory device type */ | |
287 | u32 ue_count; /* Uncorrectable Errors for this csrow */ | |
288 | u32 ce_count; /* Correctable Errors for this csrow */ | |
289 | enum mem_type mtype; /* memory csrow type */ | |
290 | enum edac_type edac_mode; /* EDAC mode for this csrow */ | |
291 | struct mem_ctl_info *mci; /* the parent */ | |
292 | ||
293 | struct kobject kobj; /* sysfs kobject for this csrow */ | |
472678eb | 294 | struct completion kobj_complete; |
da9bb1d2 AC |
295 | |
296 | /* FIXME the number of CHANNELs might need to become dynamic */ | |
297 | u32 nr_channels; | |
298 | struct channel_info *channels; | |
299 | }; | |
300 | ||
da9bb1d2 AC |
301 | struct mem_ctl_info { |
302 | struct list_head link; /* for global list of mem_ctl_info structs */ | |
303 | unsigned long mtype_cap; /* memory types supported by mc */ | |
304 | unsigned long edac_ctl_cap; /* Mem controller EDAC capabilities */ | |
305 | unsigned long edac_cap; /* configuration capabilities - this is | |
e7ecd891 DP |
306 | * closely related to edac_ctl_cap. The |
307 | * difference is that the controller may be | |
308 | * capable of s4ecd4ed which would be listed | |
309 | * in edac_ctl_cap, but if channels aren't | |
310 | * capable of s4ecd4ed then the edac_cap would | |
311 | * not have that capability. | |
312 | */ | |
da9bb1d2 AC |
313 | unsigned long scrub_cap; /* chipset scrub capabilities */ |
314 | enum scrub_type scrub_mode; /* current scrub mode */ | |
315 | ||
da9bb1d2 AC |
316 | /* pointer to edac checking routine */ |
317 | void (*edac_check) (struct mem_ctl_info * mci); | |
318 | /* | |
319 | * Remaps memory pages: controller pages to physical pages. | |
320 | * For most MC's, this will be NULL. | |
321 | */ | |
322 | /* FIXME - why not send the phys page to begin with? */ | |
323 | unsigned long (*ctl_page_to_phys) (struct mem_ctl_info * mci, | |
e7ecd891 | 324 | unsigned long page); |
da9bb1d2 AC |
325 | int mc_idx; |
326 | int nr_csrows; | |
327 | struct csrow_info *csrows; | |
328 | /* | |
329 | * FIXME - what about controllers on other busses? - IDs must be | |
330 | * unique. pdev pointer should be sufficiently unique, but | |
331 | * BUS:SLOT.FUNC numbers may not be unique. | |
332 | */ | |
333 | struct pci_dev *pdev; | |
334 | const char *mod_name; | |
335 | const char *mod_ver; | |
336 | const char *ctl_name; | |
337 | char proc_name[MC_PROC_NAME_MAX_LEN + 1]; | |
338 | void *pvt_info; | |
339 | u32 ue_noinfo_count; /* Uncorrectable Errors w/o info */ | |
340 | u32 ce_noinfo_count; /* Correctable Errors w/o info */ | |
341 | u32 ue_count; /* Total Uncorrectable Errors for this MC */ | |
342 | u32 ce_count; /* Total Correctable Errors for this MC */ | |
343 | unsigned long start_time; /* mci load start time (in jiffies) */ | |
344 | ||
345 | /* this stuff is for safe removal of mc devices from global list while | |
346 | * NMI handlers may be traversing list | |
347 | */ | |
348 | struct rcu_head rcu; | |
349 | struct completion complete; | |
350 | ||
351 | /* edac sysfs device control */ | |
352 | struct kobject edac_mci_kobj; | |
472678eb | 353 | struct completion kobj_complete; |
da9bb1d2 AC |
354 | }; |
355 | ||
da9bb1d2 | 356 | /* write all or some bits in a byte-register*/ |
e7ecd891 DP |
357 | static inline void pci_write_bits8(struct pci_dev *pdev, int offset, u8 value, |
358 | u8 mask) | |
da9bb1d2 AC |
359 | { |
360 | if (mask != 0xff) { | |
361 | u8 buf; | |
e7ecd891 | 362 | |
da9bb1d2 AC |
363 | pci_read_config_byte(pdev, offset, &buf); |
364 | value &= mask; | |
365 | buf &= ~mask; | |
366 | value |= buf; | |
367 | } | |
e7ecd891 | 368 | |
da9bb1d2 AC |
369 | pci_write_config_byte(pdev, offset, value); |
370 | } | |
371 | ||
da9bb1d2 AC |
372 | /* write all or some bits in a word-register*/ |
373 | static inline void pci_write_bits16(struct pci_dev *pdev, int offset, | |
e7ecd891 | 374 | u16 value, u16 mask) |
da9bb1d2 AC |
375 | { |
376 | if (mask != 0xffff) { | |
377 | u16 buf; | |
e7ecd891 | 378 | |
da9bb1d2 AC |
379 | pci_read_config_word(pdev, offset, &buf); |
380 | value &= mask; | |
381 | buf &= ~mask; | |
382 | value |= buf; | |
383 | } | |
e7ecd891 | 384 | |
da9bb1d2 AC |
385 | pci_write_config_word(pdev, offset, value); |
386 | } | |
387 | ||
da9bb1d2 AC |
388 | /* write all or some bits in a dword-register*/ |
389 | static inline void pci_write_bits32(struct pci_dev *pdev, int offset, | |
e7ecd891 | 390 | u32 value, u32 mask) |
da9bb1d2 AC |
391 | { |
392 | if (mask != 0xffff) { | |
393 | u32 buf; | |
e7ecd891 | 394 | |
da9bb1d2 AC |
395 | pci_read_config_dword(pdev, offset, &buf); |
396 | value &= mask; | |
397 | buf &= ~mask; | |
398 | value |= buf; | |
399 | } | |
e7ecd891 | 400 | |
da9bb1d2 AC |
401 | pci_write_config_dword(pdev, offset, value); |
402 | } | |
403 | ||
da9bb1d2 AC |
404 | #ifdef CONFIG_EDAC_DEBUG |
405 | void edac_mc_dump_channel(struct channel_info *chan); | |
406 | void edac_mc_dump_mci(struct mem_ctl_info *mci); | |
407 | void edac_mc_dump_csrow(struct csrow_info *csrow); | |
e7ecd891 | 408 | #endif /* CONFIG_EDAC_DEBUG */ |
da9bb1d2 AC |
409 | |
410 | extern int edac_mc_add_mc(struct mem_ctl_info *mci); | |
18dbc337 | 411 | extern struct mem_ctl_info * edac_mc_del_mc(struct pci_dev *pdev); |
da9bb1d2 | 412 | extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, |
e7ecd891 DP |
413 | unsigned long page); |
414 | extern void edac_mc_scrub_block(unsigned long page, unsigned long offset, | |
415 | u32 size); | |
da9bb1d2 AC |
416 | |
417 | /* | |
418 | * The no info errors are used when error overflows are reported. | |
419 | * There are a limited number of error logging registers that can | |
420 | * be exausted. When all registers are exhausted and an additional | |
421 | * error occurs then an error overflow register records that an | |
422 | * error occured and the type of error, but doesn't have any | |
423 | * further information. The ce/ue versions make for cleaner | |
424 | * reporting logic and function interface - reduces conditional | |
425 | * statement clutter and extra function arguments. | |
426 | */ | |
427 | extern void edac_mc_handle_ce(struct mem_ctl_info *mci, | |
e7ecd891 DP |
428 | unsigned long page_frame_number, unsigned long offset_in_page, |
429 | unsigned long syndrome, int row, int channel, | |
430 | const char *msg); | |
da9bb1d2 | 431 | extern void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, |
e7ecd891 | 432 | const char *msg); |
da9bb1d2 | 433 | extern void edac_mc_handle_ue(struct mem_ctl_info *mci, |
e7ecd891 DP |
434 | unsigned long page_frame_number, unsigned long offset_in_page, |
435 | int row, const char *msg); | |
da9bb1d2 | 436 | extern void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, |
e7ecd891 | 437 | const char *msg); |
da9bb1d2 AC |
438 | |
439 | /* | |
440 | * This kmalloc's and initializes all the structures. | |
441 | * Can't be used if all structures don't have the same lifetime. | |
442 | */ | |
e7ecd891 DP |
443 | extern struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, |
444 | unsigned nr_chans); | |
da9bb1d2 AC |
445 | |
446 | /* Free an mc previously allocated by edac_mc_alloc() */ | |
447 | extern void edac_mc_free(struct mem_ctl_info *mci); | |
448 | ||
da9bb1d2 | 449 | #endif /* _EDAC_MC_H_ */ |