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c0d12172 DJ |
1 | /* |
2 | * Generic EDAC defs | |
3 | * | |
4 | * Author: Dave Jiang <djiang@mvista.com> | |
5 | * | |
c3c52bce | 6 | * 2006-2008 (c) MontaVista Software, Inc. This file is licensed under |
c0d12172 DJ |
7 | * the terms of the GNU General Public License version 2. This program |
8 | * is licensed "as is" without any warranty of any kind, whether express | |
9 | * or implied. | |
10 | * | |
11 | */ | |
12 | #ifndef _LINUX_EDAC_H_ | |
13 | #define _LINUX_EDAC_H_ | |
14 | ||
60063497 | 15 | #include <linux/atomic.h> |
7a623c03 | 16 | #include <linux/device.h> |
313162d0 PG |
17 | #include <linux/completion.h> |
18 | #include <linux/workqueue.h> | |
452a6bf9 | 19 | #include <linux/debugfs.h> |
313162d0 PG |
20 | |
21 | struct device; | |
c0d12172 DJ |
22 | |
23 | #define EDAC_OPSTATE_INVAL -1 | |
24 | #define EDAC_OPSTATE_POLL 0 | |
25 | #define EDAC_OPSTATE_NMI 1 | |
26 | #define EDAC_OPSTATE_INT 2 | |
27 | ||
28 | extern int edac_op_state; | |
66ee2f94 | 29 | extern int edac_err_assert; |
c0d12172 | 30 | extern atomic_t edac_handlers; |
fe5ff8b8 | 31 | extern struct bus_type edac_subsys; |
c0d12172 DJ |
32 | |
33 | extern int edac_handler_set(void); | |
34 | extern void edac_atomic_assert_error(void); | |
fe5ff8b8 KS |
35 | extern struct bus_type *edac_get_sysfs_subsys(void); |
36 | extern void edac_put_sysfs_subsys(void); | |
c0d12172 | 37 | |
c700f013 CG |
38 | enum { |
39 | EDAC_REPORTING_ENABLED, | |
40 | EDAC_REPORTING_DISABLED, | |
41 | EDAC_REPORTING_FORCE | |
42 | }; | |
43 | ||
44 | extern int edac_report_status; | |
45 | #ifdef CONFIG_EDAC | |
46 | static inline int get_edac_report_status(void) | |
47 | { | |
48 | return edac_report_status; | |
49 | } | |
50 | ||
51 | static inline void set_edac_report_status(int new) | |
52 | { | |
53 | edac_report_status = new; | |
54 | } | |
55 | #else | |
56 | static inline int get_edac_report_status(void) | |
57 | { | |
58 | return EDAC_REPORTING_DISABLED; | |
59 | } | |
60 | ||
61 | static inline void set_edac_report_status(int new) | |
62 | { | |
63 | } | |
64 | #endif | |
65 | ||
c3c52bce HM |
66 | static inline void opstate_init(void) |
67 | { | |
68 | switch (edac_op_state) { | |
69 | case EDAC_OPSTATE_POLL: | |
70 | case EDAC_OPSTATE_NMI: | |
71 | break; | |
72 | default: | |
73 | edac_op_state = EDAC_OPSTATE_POLL; | |
74 | } | |
75 | return; | |
76 | } | |
77 | ||
c7ef7645 | 78 | /* Max length of a DIMM label*/ |
ddeb3547 | 79 | #define EDAC_MC_LABEL_LEN 31 |
ddeb3547 | 80 | |
c7ef7645 | 81 | /* Maximum size of the location string */ |
56507694 | 82 | #define LOCATION_SIZE 256 |
c7ef7645 MCC |
83 | |
84 | /* Defines the maximum number of labels that can be reported */ | |
85 | #define EDAC_MAX_LABELS 8 | |
86 | ||
87 | /* String used to join two or more labels */ | |
88 | #define OTHER_LABEL " or " | |
89 | ||
b0610bb8 MCC |
90 | /** |
91 | * enum dev_type - describe the type of memory DRAM chips used at the stick | |
92 | * @DEV_UNKNOWN: Can't be determined, or MC doesn't support detect it | |
93 | * @DEV_X1: 1 bit for data | |
94 | * @DEV_X2: 2 bits for data | |
95 | * @DEV_X4: 4 bits for data | |
96 | * @DEV_X8: 8 bits for data | |
97 | * @DEV_X16: 16 bits for data | |
98 | * @DEV_X32: 32 bits for data | |
99 | * @DEV_X64: 64 bits for data | |
100 | * | |
101 | * Typical values are x4 and x8. | |
102 | */ | |
ddeb3547 MCC |
103 | enum dev_type { |
104 | DEV_UNKNOWN = 0, | |
105 | DEV_X1, | |
106 | DEV_X2, | |
107 | DEV_X4, | |
108 | DEV_X8, | |
109 | DEV_X16, | |
110 | DEV_X32, /* Do these parts exist? */ | |
111 | DEV_X64 /* Do these parts exist? */ | |
112 | }; | |
113 | ||
114 | #define DEV_FLAG_UNKNOWN BIT(DEV_UNKNOWN) | |
115 | #define DEV_FLAG_X1 BIT(DEV_X1) | |
116 | #define DEV_FLAG_X2 BIT(DEV_X2) | |
117 | #define DEV_FLAG_X4 BIT(DEV_X4) | |
118 | #define DEV_FLAG_X8 BIT(DEV_X8) | |
119 | #define DEV_FLAG_X16 BIT(DEV_X16) | |
120 | #define DEV_FLAG_X32 BIT(DEV_X32) | |
121 | #define DEV_FLAG_X64 BIT(DEV_X64) | |
122 | ||
982216a4 MCC |
123 | /** |
124 | * enum hw_event_mc_err_type - type of the detected error | |
125 | * | |
126 | * @HW_EVENT_ERR_CORRECTED: Corrected Error - Indicates that an ECC | |
127 | * corrected error was detected | |
128 | * @HW_EVENT_ERR_UNCORRECTED: Uncorrected Error - Indicates an error that | |
129 | * can't be corrected by ECC, but it is not | |
130 | * fatal (maybe it is on an unused memory area, | |
131 | * or the memory controller could recover from | |
132 | * it for example, by re-trying the operation). | |
133 | * @HW_EVENT_ERR_FATAL: Fatal Error - Uncorrected error that could not | |
134 | * be recovered. | |
135 | */ | |
136 | enum hw_event_mc_err_type { | |
137 | HW_EVENT_ERR_CORRECTED, | |
138 | HW_EVENT_ERR_UNCORRECTED, | |
139 | HW_EVENT_ERR_FATAL, | |
8dd93d45 | 140 | HW_EVENT_ERR_INFO, |
982216a4 MCC |
141 | }; |
142 | ||
8dd93d45 MCC |
143 | static inline char *mc_event_error_type(const unsigned int err_type) |
144 | { | |
145 | switch (err_type) { | |
146 | case HW_EVENT_ERR_CORRECTED: | |
147 | return "Corrected"; | |
148 | case HW_EVENT_ERR_UNCORRECTED: | |
149 | return "Uncorrected"; | |
150 | case HW_EVENT_ERR_FATAL: | |
151 | return "Fatal"; | |
152 | default: | |
153 | case HW_EVENT_ERR_INFO: | |
154 | return "Info"; | |
155 | } | |
156 | } | |
157 | ||
01a6e28b MCC |
158 | /** |
159 | * enum mem_type - memory types. For a more detailed reference, please see | |
160 | * http://en.wikipedia.org/wiki/DRAM | |
161 | * | |
162 | * @MEM_EMPTY Empty csrow | |
163 | * @MEM_RESERVED: Reserved csrow type | |
164 | * @MEM_UNKNOWN: Unknown csrow type | |
165 | * @MEM_FPM: FPM - Fast Page Mode, used on systems up to 1995. | |
166 | * @MEM_EDO: EDO - Extended data out, used on systems up to 1998. | |
167 | * @MEM_BEDO: BEDO - Burst Extended data out, an EDO variant. | |
168 | * @MEM_SDR: SDR - Single data rate SDRAM | |
169 | * http://en.wikipedia.org/wiki/Synchronous_dynamic_random-access_memory | |
170 | * They use 3 pins for chip select: Pins 0 and 2 are | |
171 | * for rank 0; pins 1 and 3 are for rank 1, if the memory | |
172 | * is dual-rank. | |
173 | * @MEM_RDR: Registered SDR SDRAM | |
174 | * @MEM_DDR: Double data rate SDRAM | |
175 | * http://en.wikipedia.org/wiki/DDR_SDRAM | |
176 | * @MEM_RDDR: Registered Double data rate SDRAM | |
177 | * This is a variant of the DDR memories. | |
178 | * A registered memory has a buffer inside it, hiding | |
179 | * part of the memory details to the memory controller. | |
180 | * @MEM_RMBS: Rambus DRAM, used on a few Pentium III/IV controllers. | |
181 | * @MEM_DDR2: DDR2 RAM, as described at JEDEC JESD79-2F. | |
182 | * Those memories are labed as "PC2-" instead of "PC" to | |
183 | * differenciate from DDR. | |
184 | * @MEM_FB_DDR2: Fully-Buffered DDR2, as described at JEDEC Std No. 205 | |
185 | * and JESD206. | |
186 | * Those memories are accessed per DIMM slot, and not by | |
187 | * a chip select signal. | |
188 | * @MEM_RDDR2: Registered DDR2 RAM | |
189 | * This is a variant of the DDR2 memories. | |
190 | * @MEM_XDR: Rambus XDR | |
191 | * It is an evolution of the original RAMBUS memories, | |
192 | * created to compete with DDR2. Weren't used on any | |
193 | * x86 arch, but cell_edac PPC memory controller uses it. | |
194 | * @MEM_DDR3: DDR3 RAM | |
195 | * @MEM_RDDR3: Registered DDR3 RAM | |
196 | * This is a variant of the DDR3 memories. | |
197 | */ | |
ddeb3547 | 198 | enum mem_type { |
01a6e28b MCC |
199 | MEM_EMPTY = 0, |
200 | MEM_RESERVED, | |
201 | MEM_UNKNOWN, | |
202 | MEM_FPM, | |
203 | MEM_EDO, | |
204 | MEM_BEDO, | |
205 | MEM_SDR, | |
206 | MEM_RDR, | |
207 | MEM_DDR, | |
208 | MEM_RDDR, | |
209 | MEM_RMBS, | |
210 | MEM_DDR2, | |
211 | MEM_FB_DDR2, | |
212 | MEM_RDDR2, | |
213 | MEM_XDR, | |
214 | MEM_DDR3, | |
215 | MEM_RDDR3, | |
ddeb3547 MCC |
216 | }; |
217 | ||
218 | #define MEM_FLAG_EMPTY BIT(MEM_EMPTY) | |
219 | #define MEM_FLAG_RESERVED BIT(MEM_RESERVED) | |
220 | #define MEM_FLAG_UNKNOWN BIT(MEM_UNKNOWN) | |
221 | #define MEM_FLAG_FPM BIT(MEM_FPM) | |
222 | #define MEM_FLAG_EDO BIT(MEM_EDO) | |
223 | #define MEM_FLAG_BEDO BIT(MEM_BEDO) | |
224 | #define MEM_FLAG_SDR BIT(MEM_SDR) | |
225 | #define MEM_FLAG_RDR BIT(MEM_RDR) | |
226 | #define MEM_FLAG_DDR BIT(MEM_DDR) | |
227 | #define MEM_FLAG_RDDR BIT(MEM_RDDR) | |
228 | #define MEM_FLAG_RMBS BIT(MEM_RMBS) | |
229 | #define MEM_FLAG_DDR2 BIT(MEM_DDR2) | |
230 | #define MEM_FLAG_FB_DDR2 BIT(MEM_FB_DDR2) | |
231 | #define MEM_FLAG_RDDR2 BIT(MEM_RDDR2) | |
232 | #define MEM_FLAG_XDR BIT(MEM_XDR) | |
233 | #define MEM_FLAG_DDR3 BIT(MEM_DDR3) | |
234 | #define MEM_FLAG_RDDR3 BIT(MEM_RDDR3) | |
235 | ||
b0610bb8 MCC |
236 | /** |
237 | * enum edac-type - Error Detection and Correction capabilities and mode | |
238 | * @EDAC_UNKNOWN: Unknown if ECC is available | |
239 | * @EDAC_NONE: Doesn't support ECC | |
240 | * @EDAC_RESERVED: Reserved ECC type | |
241 | * @EDAC_PARITY: Detects parity errors | |
242 | * @EDAC_EC: Error Checking - no correction | |
243 | * @EDAC_SECDED: Single bit error correction, Double detection | |
244 | * @EDAC_S2ECD2ED: Chipkill x2 devices - do these exist? | |
245 | * @EDAC_S4ECD4ED: Chipkill x4 devices | |
246 | * @EDAC_S8ECD8ED: Chipkill x8 devices | |
247 | * @EDAC_S16ECD16ED: Chipkill x16 devices | |
248 | */ | |
ddeb3547 | 249 | enum edac_type { |
b0610bb8 MCC |
250 | EDAC_UNKNOWN = 0, |
251 | EDAC_NONE, | |
252 | EDAC_RESERVED, | |
253 | EDAC_PARITY, | |
254 | EDAC_EC, | |
255 | EDAC_SECDED, | |
256 | EDAC_S2ECD2ED, | |
257 | EDAC_S4ECD4ED, | |
258 | EDAC_S8ECD8ED, | |
259 | EDAC_S16ECD16ED, | |
ddeb3547 MCC |
260 | }; |
261 | ||
262 | #define EDAC_FLAG_UNKNOWN BIT(EDAC_UNKNOWN) | |
263 | #define EDAC_FLAG_NONE BIT(EDAC_NONE) | |
264 | #define EDAC_FLAG_PARITY BIT(EDAC_PARITY) | |
265 | #define EDAC_FLAG_EC BIT(EDAC_EC) | |
266 | #define EDAC_FLAG_SECDED BIT(EDAC_SECDED) | |
267 | #define EDAC_FLAG_S2ECD2ED BIT(EDAC_S2ECD2ED) | |
268 | #define EDAC_FLAG_S4ECD4ED BIT(EDAC_S4ECD4ED) | |
269 | #define EDAC_FLAG_S8ECD8ED BIT(EDAC_S8ECD8ED) | |
270 | #define EDAC_FLAG_S16ECD16ED BIT(EDAC_S16ECD16ED) | |
271 | ||
b0610bb8 MCC |
272 | /** |
273 | * enum scrub_type - scrubbing capabilities | |
274 | * @SCRUB_UNKNOWN Unknown if scrubber is available | |
275 | * @SCRUB_NONE: No scrubber | |
276 | * @SCRUB_SW_PROG: SW progressive (sequential) scrubbing | |
277 | * @SCRUB_SW_SRC: Software scrub only errors | |
278 | * @SCRUB_SW_PROG_SRC: Progressive software scrub from an error | |
279 | * @SCRUB_SW_TUNABLE: Software scrub frequency is tunable | |
280 | * @SCRUB_HW_PROG: HW progressive (sequential) scrubbing | |
281 | * @SCRUB_HW_SRC: Hardware scrub only errors | |
282 | * @SCRUB_HW_PROG_SRC: Progressive hardware scrub from an error | |
283 | * SCRUB_HW_TUNABLE: Hardware scrub frequency is tunable | |
284 | */ | |
ddeb3547 | 285 | enum scrub_type { |
b0610bb8 MCC |
286 | SCRUB_UNKNOWN = 0, |
287 | SCRUB_NONE, | |
288 | SCRUB_SW_PROG, | |
289 | SCRUB_SW_SRC, | |
290 | SCRUB_SW_PROG_SRC, | |
291 | SCRUB_SW_TUNABLE, | |
292 | SCRUB_HW_PROG, | |
293 | SCRUB_HW_SRC, | |
294 | SCRUB_HW_PROG_SRC, | |
295 | SCRUB_HW_TUNABLE | |
ddeb3547 MCC |
296 | }; |
297 | ||
298 | #define SCRUB_FLAG_SW_PROG BIT(SCRUB_SW_PROG) | |
299 | #define SCRUB_FLAG_SW_SRC BIT(SCRUB_SW_SRC) | |
300 | #define SCRUB_FLAG_SW_PROG_SRC BIT(SCRUB_SW_PROG_SRC) | |
301 | #define SCRUB_FLAG_SW_TUN BIT(SCRUB_SW_SCRUB_TUNABLE) | |
302 | #define SCRUB_FLAG_HW_PROG BIT(SCRUB_HW_PROG) | |
303 | #define SCRUB_FLAG_HW_SRC BIT(SCRUB_HW_SRC) | |
304 | #define SCRUB_FLAG_HW_PROG_SRC BIT(SCRUB_HW_PROG_SRC) | |
305 | #define SCRUB_FLAG_HW_TUN BIT(SCRUB_HW_TUNABLE) | |
306 | ||
307 | /* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */ | |
308 | ||
309 | /* EDAC internal operation states */ | |
310 | #define OP_ALLOC 0x100 | |
311 | #define OP_RUNNING_POLL 0x201 | |
312 | #define OP_RUNNING_INTERRUPT 0x202 | |
313 | #define OP_RUNNING_POLL_INTR 0x203 | |
314 | #define OP_OFFLINE 0x300 | |
315 | ||
316 | /* | |
01a6e28b | 317 | * Concepts used at the EDAC subsystem |
ddeb3547 | 318 | * |
01a6e28b | 319 | * There are several things to be aware of that aren't at all obvious: |
ddeb3547 MCC |
320 | * |
321 | * SOCKETS, SOCKET SETS, BANKS, ROWS, CHIP-SELECT ROWS, CHANNELS, etc.. | |
322 | * | |
323 | * These are some of the many terms that are thrown about that don't always | |
324 | * mean what people think they mean (Inconceivable!). In the interest of | |
325 | * creating a common ground for discussion, terms and their definitions | |
326 | * will be established. | |
327 | * | |
01a6e28b MCC |
328 | * Memory devices: The individual DRAM chips on a memory stick. These |
329 | * devices commonly output 4 and 8 bits each (x4, x8). | |
330 | * Grouping several of these in parallel provides the | |
331 | * number of bits that the memory controller expects: | |
332 | * typically 72 bits, in order to provide 64 bits + | |
333 | * 8 bits of ECC data. | |
ddeb3547 MCC |
334 | * |
335 | * Memory Stick: A printed circuit board that aggregates multiple | |
01a6e28b MCC |
336 | * memory devices in parallel. In general, this is the |
337 | * Field Replaceable Unit (FRU) which gets replaced, in | |
338 | * the case of excessive errors. Most often it is also | |
339 | * called DIMM (Dual Inline Memory Module). | |
340 | * | |
341 | * Memory Socket: A physical connector on the motherboard that accepts | |
342 | * a single memory stick. Also called as "slot" on several | |
343 | * datasheets. | |
ddeb3547 | 344 | * |
01a6e28b MCC |
345 | * Channel: A memory controller channel, responsible to communicate |
346 | * with a group of DIMMs. Each channel has its own | |
347 | * independent control (command) and data bus, and can | |
348 | * be used independently or grouped with other channels. | |
ddeb3547 | 349 | * |
01a6e28b MCC |
350 | * Branch: It is typically the highest hierarchy on a |
351 | * Fully-Buffered DIMM memory controller. | |
352 | * Typically, it contains two channels. | |
353 | * Two channels at the same branch can be used in single | |
354 | * mode or in lockstep mode. | |
355 | * When lockstep is enabled, the cacheline is doubled, | |
356 | * but it generally brings some performance penalty. | |
357 | * Also, it is generally not possible to point to just one | |
358 | * memory stick when an error occurs, as the error | |
359 | * correction code is calculated using two DIMMs instead | |
360 | * of one. Due to that, it is capable of correcting more | |
361 | * errors than on single mode. | |
ddeb3547 | 362 | * |
01a6e28b MCC |
363 | * Single-channel: The data accessed by the memory controller is contained |
364 | * into one dimm only. E. g. if the data is 64 bits-wide, | |
365 | * the data flows to the CPU using one 64 bits parallel | |
366 | * access. | |
367 | * Typically used with SDR, DDR, DDR2 and DDR3 memories. | |
368 | * FB-DIMM and RAMBUS use a different concept for channel, | |
369 | * so this concept doesn't apply there. | |
370 | * | |
371 | * Double-channel: The data size accessed by the memory controller is | |
372 | * interlaced into two dimms, accessed at the same time. | |
373 | * E. g. if the DIMM is 64 bits-wide (72 bits with ECC), | |
374 | * the data flows to the CPU using a 128 bits parallel | |
375 | * access. | |
376 | * | |
377 | * Chip-select row: This is the name of the DRAM signal used to select the | |
378 | * DRAM ranks to be accessed. Common chip-select rows for | |
379 | * single channel are 64 bits, for dual channel 128 bits. | |
380 | * It may not be visible by the memory controller, as some | |
381 | * DIMM types have a memory buffer that can hide direct | |
382 | * access to it from the Memory Controller. | |
ddeb3547 MCC |
383 | * |
384 | * Single-Ranked stick: A Single-ranked stick has 1 chip-select row of memory. | |
385 | * Motherboards commonly drive two chip-select pins to | |
386 | * a memory stick. A single-ranked stick, will occupy | |
387 | * only one of those rows. The other will be unused. | |
388 | * | |
389 | * Double-Ranked stick: A double-ranked stick has two chip-select rows which | |
390 | * access different sets of memory devices. The two | |
391 | * rows cannot be accessed concurrently. | |
392 | * | |
393 | * Double-sided stick: DEPRECATED TERM, see Double-Ranked stick. | |
394 | * A double-sided stick has two chip-select rows which | |
01a6e28b MCC |
395 | * access different sets of memory devices. The two |
396 | * rows cannot be accessed concurrently. "Double-sided" | |
ddeb3547 MCC |
397 | * is irrespective of the memory devices being mounted |
398 | * on both sides of the memory stick. | |
399 | * | |
400 | * Socket set: All of the memory sticks that are required for | |
401 | * a single memory access or all of the memory sticks | |
402 | * spanned by a chip-select row. A single socket set | |
403 | * has two chip-select rows and if double-sided sticks | |
404 | * are used these will occupy those chip-select rows. | |
405 | * | |
406 | * Bank: This term is avoided because it is unclear when | |
407 | * needing to distinguish between chip-select rows and | |
408 | * socket sets. | |
409 | * | |
410 | * Controller pages: | |
411 | * | |
412 | * Physical pages: | |
413 | * | |
414 | * Virtual pages: | |
415 | * | |
416 | * | |
417 | * STRUCTURE ORGANIZATION AND CHOICES | |
418 | * | |
419 | * | |
420 | * | |
421 | * PS - I enjoyed writing all that about as much as you enjoyed reading it. | |
422 | */ | |
423 | ||
982216a4 MCC |
424 | /** |
425 | * enum edac_mc_layer - memory controller hierarchy layer | |
426 | * | |
427 | * @EDAC_MC_LAYER_BRANCH: memory layer is named "branch" | |
428 | * @EDAC_MC_LAYER_CHANNEL: memory layer is named "channel" | |
429 | * @EDAC_MC_LAYER_SLOT: memory layer is named "slot" | |
430 | * @EDAC_MC_LAYER_CHIP_SELECT: memory layer is named "chip select" | |
c66b5a79 MCC |
431 | * @EDAC_MC_LAYER_ALL_MEM: memory layout is unknown. All memory is mapped |
432 | * as a single memory area. This is used when | |
433 | * retrieving errors from a firmware driven driver. | |
982216a4 MCC |
434 | * |
435 | * This enum is used by the drivers to tell edac_mc_sysfs what name should | |
436 | * be used when describing a memory stick location. | |
437 | */ | |
438 | enum edac_mc_layer_type { | |
439 | EDAC_MC_LAYER_BRANCH, | |
440 | EDAC_MC_LAYER_CHANNEL, | |
441 | EDAC_MC_LAYER_SLOT, | |
442 | EDAC_MC_LAYER_CHIP_SELECT, | |
c66b5a79 | 443 | EDAC_MC_LAYER_ALL_MEM, |
982216a4 MCC |
444 | }; |
445 | ||
446 | /** | |
447 | * struct edac_mc_layer - describes the memory controller hierarchy | |
448 | * @layer: layer type | |
449 | * @size: number of components per layer. For example, | |
450 | * if the channel layer has two channels, size = 2 | |
451 | * @is_virt_csrow: This layer is part of the "csrow" when old API | |
452 | * compatibility mode is enabled. Otherwise, it is | |
453 | * a channel | |
454 | */ | |
455 | struct edac_mc_layer { | |
456 | enum edac_mc_layer_type type; | |
457 | unsigned size; | |
458 | bool is_virt_csrow; | |
459 | }; | |
460 | ||
461 | /* | |
462 | * Maximum number of layers used by the memory controller to uniquely | |
463 | * identify a single memory stick. | |
464 | * NOTE: Changing this constant requires not only to change the constant | |
465 | * below, but also to change the existing code at the core, as there are | |
466 | * some code there that are optimized for 3 layers. | |
467 | */ | |
468 | #define EDAC_MAX_LAYERS 3 | |
469 | ||
470 | /** | |
de3910eb | 471 | * EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a pointer array |
982216a4 MCC |
472 | * for the element given by [layer0,layer1,layer2] position |
473 | * | |
474 | * @layers: a struct edac_mc_layer array, describing how many elements | |
475 | * were allocated for each layer | |
982216a4 MCC |
476 | * @n_layers: Number of layers at the @layers array |
477 | * @layer0: layer0 position | |
478 | * @layer1: layer1 position. Unused if n_layers < 2 | |
479 | * @layer2: layer2 position. Unused if n_layers < 3 | |
480 | * | |
de3910eb | 481 | * For 1 layer, this macro returns &var[layer0] - &var |
982216a4 | 482 | * For 2 layers, this macro is similar to allocate a bi-dimensional array |
de3910eb | 483 | * and to return "&var[layer0][layer1] - &var" |
982216a4 | 484 | * For 3 layers, this macro is similar to allocate a tri-dimensional array |
de3910eb | 485 | * and to return "&var[layer0][layer1][layer2] - &var" |
982216a4 MCC |
486 | * |
487 | * A loop could be used here to make it more generic, but, as we only have | |
488 | * 3 layers, this is a little faster. | |
489 | * By design, layers can never be 0 or more than 3. If that ever happens, | |
490 | * a NULL is returned, causing an OOPS during the memory allocation routine, | |
491 | * with would point to the developer that he's doing something wrong. | |
492 | */ | |
de3910eb MCC |
493 | #define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \ |
494 | int __i; \ | |
982216a4 | 495 | if ((nlayers) == 1) \ |
de3910eb | 496 | __i = layer0; \ |
982216a4 | 497 | else if ((nlayers) == 2) \ |
de3910eb | 498 | __i = (layer1) + ((layers[1]).size * (layer0)); \ |
982216a4 | 499 | else if ((nlayers) == 3) \ |
de3910eb MCC |
500 | __i = (layer2) + ((layers[2]).size * ((layer1) + \ |
501 | ((layers[1]).size * (layer0)))); \ | |
982216a4 | 502 | else \ |
de3910eb MCC |
503 | __i = -EINVAL; \ |
504 | __i; \ | |
505 | }) | |
506 | ||
507 | /** | |
508 | * EDAC_DIMM_PTR - Macro responsible to get a pointer inside a pointer array | |
509 | * for the element given by [layer0,layer1,layer2] position | |
510 | * | |
511 | * @layers: a struct edac_mc_layer array, describing how many elements | |
512 | * were allocated for each layer | |
513 | * @var: name of the var where we want to get the pointer | |
514 | * (like mci->dimms) | |
515 | * @n_layers: Number of layers at the @layers array | |
516 | * @layer0: layer0 position | |
517 | * @layer1: layer1 position. Unused if n_layers < 2 | |
518 | * @layer2: layer2 position. Unused if n_layers < 3 | |
519 | * | |
520 | * For 1 layer, this macro returns &var[layer0] | |
521 | * For 2 layers, this macro is similar to allocate a bi-dimensional array | |
522 | * and to return "&var[layer0][layer1]" | |
523 | * For 3 layers, this macro is similar to allocate a tri-dimensional array | |
524 | * and to return "&var[layer0][layer1][layer2]" | |
525 | */ | |
526 | #define EDAC_DIMM_PTR(layers, var, nlayers, layer0, layer1, layer2) ({ \ | |
527 | typeof(*var) __p; \ | |
528 | int ___i = EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2); \ | |
529 | if (___i < 0) \ | |
982216a4 | 530 | __p = NULL; \ |
de3910eb MCC |
531 | else \ |
532 | __p = (var)[___i]; \ | |
982216a4 MCC |
533 | __p; \ |
534 | }) | |
535 | ||
a7d7d2e1 | 536 | struct dimm_info { |
7a623c03 MCC |
537 | struct device dev; |
538 | ||
a7d7d2e1 | 539 | char label[EDAC_MC_LABEL_LEN + 1]; /* DIMM label on motherboard */ |
4275be63 MCC |
540 | |
541 | /* Memory location data */ | |
542 | unsigned location[EDAC_MAX_LAYERS]; | |
543 | ||
544 | struct mem_ctl_info *mci; /* the parent */ | |
084a4fcc MCC |
545 | |
546 | u32 grain; /* granularity of reported error in bytes */ | |
547 | enum dev_type dtype; /* memory device type */ | |
548 | enum mem_type mtype; /* memory dimm type */ | |
549 | enum edac_type edac_mode; /* EDAC mode for this dimm */ | |
550 | ||
4275be63 | 551 | u32 nr_pages; /* number of pages on this dimm */ |
a895bf8b | 552 | |
4275be63 | 553 | unsigned csrow, cschannel; /* Points to the old API data */ |
a7d7d2e1 MCC |
554 | }; |
555 | ||
a4b4be3f MCC |
556 | /** |
557 | * struct rank_info - contains the information for one DIMM rank | |
558 | * | |
559 | * @chan_idx: channel number where the rank is (typically, 0 or 1) | |
560 | * @ce_count: number of correctable errors for this rank | |
a4b4be3f MCC |
561 | * @csrow: A pointer to the chip select row structure (the parent |
562 | * structure). The location of the rank is given by | |
563 | * the (csrow->csrow_idx, chan_idx) vector. | |
a7d7d2e1 MCC |
564 | * @dimm: A pointer to the DIMM structure, where the DIMM label |
565 | * information is stored. | |
566 | * | |
567 | * FIXME: Currently, the EDAC core model will assume one DIMM per rank. | |
568 | * This is a bad assumption, but it makes this patch easier. Later | |
569 | * patches in this series will fix this issue. | |
a4b4be3f MCC |
570 | */ |
571 | struct rank_info { | |
572 | int chan_idx; | |
a7d7d2e1 MCC |
573 | struct csrow_info *csrow; |
574 | struct dimm_info *dimm; | |
4275be63 MCC |
575 | |
576 | u32 ce_count; /* Correctable Errors for this csrow */ | |
ddeb3547 MCC |
577 | }; |
578 | ||
579 | struct csrow_info { | |
7a623c03 MCC |
580 | struct device dev; |
581 | ||
a895bf8b | 582 | /* Used only by edac_mc_find_csrow_by_page() */ |
084a4fcc MCC |
583 | unsigned long first_page; /* first page number in csrow */ |
584 | unsigned long last_page; /* last page number in csrow */ | |
ddeb3547 | 585 | unsigned long page_mask; /* used for interleaving - |
a895bf8b MCC |
586 | * 0UL for non intlv */ |
587 | ||
084a4fcc MCC |
588 | int csrow_idx; /* the chip-select row */ |
589 | ||
ddeb3547 MCC |
590 | u32 ue_count; /* Uncorrectable Errors for this csrow */ |
591 | u32 ce_count; /* Correctable Errors for this csrow */ | |
084a4fcc | 592 | |
ddeb3547 MCC |
593 | struct mem_ctl_info *mci; /* the parent */ |
594 | ||
ddeb3547 MCC |
595 | /* channel information for this csrow */ |
596 | u32 nr_channels; | |
de3910eb | 597 | struct rank_info **channels; |
ddeb3547 MCC |
598 | }; |
599 | ||
7a623c03 MCC |
600 | /* |
601 | * struct errcount_attribute - used to store the several error counts | |
602 | */ | |
603 | struct errcount_attribute_data { | |
604 | int n_layers; | |
605 | int pos[EDAC_MAX_LAYERS]; | |
606 | int layer0, layer1, layer2; | |
ddeb3547 MCC |
607 | }; |
608 | ||
c7ef7645 MCC |
609 | /** |
610 | * edac_raw_error_desc - Raw error report structure | |
611 | * @grain: minimum granularity for an error report, in bytes | |
612 | * @error_count: number of errors of the same type | |
613 | * @top_layer: top layer of the error (layer[0]) | |
614 | * @mid_layer: middle layer of the error (layer[1]) | |
615 | * @low_layer: low layer of the error (layer[2]) | |
616 | * @page_frame_number: page where the error happened | |
617 | * @offset_in_page: page offset | |
618 | * @syndrome: syndrome of the error (or 0 if unknown or if | |
619 | * the syndrome is not applicable) | |
620 | * @msg: error message | |
621 | * @location: location of the error | |
622 | * @label: label of the affected DIMM(s) | |
623 | * @other_detail: other driver-specific detail about the error | |
624 | * @enable_per_layer_report: if false, the error affects all layers | |
625 | * (typically, a memory controller error) | |
626 | */ | |
627 | struct edac_raw_error_desc { | |
628 | /* | |
629 | * NOTE: everything before grain won't be cleaned by | |
630 | * edac_raw_error_desc_clean() | |
631 | */ | |
632 | char location[LOCATION_SIZE]; | |
633 | char label[(EDAC_MC_LABEL_LEN + 1 + sizeof(OTHER_LABEL)) * EDAC_MAX_LABELS]; | |
634 | long grain; | |
635 | ||
636 | /* the vars below and grain will be cleaned on every new error report */ | |
637 | u16 error_count; | |
638 | int top_layer; | |
639 | int mid_layer; | |
640 | int low_layer; | |
641 | unsigned long page_frame_number; | |
642 | unsigned long offset_in_page; | |
643 | unsigned long syndrome; | |
644 | const char *msg; | |
645 | const char *other_detail; | |
646 | bool enable_per_layer_report; | |
647 | }; | |
648 | ||
ddeb3547 MCC |
649 | /* MEMORY controller information structure |
650 | */ | |
651 | struct mem_ctl_info { | |
7a623c03 | 652 | struct device dev; |
88d84ac9 | 653 | struct bus_type *bus; |
7a623c03 | 654 | |
ddeb3547 MCC |
655 | struct list_head link; /* for global list of mem_ctl_info structs */ |
656 | ||
657 | struct module *owner; /* Module owner of this control struct */ | |
658 | ||
659 | unsigned long mtype_cap; /* memory types supported by mc */ | |
660 | unsigned long edac_ctl_cap; /* Mem controller EDAC capabilities */ | |
661 | unsigned long edac_cap; /* configuration capabilities - this is | |
662 | * closely related to edac_ctl_cap. The | |
663 | * difference is that the controller may be | |
664 | * capable of s4ecd4ed which would be listed | |
665 | * in edac_ctl_cap, but if channels aren't | |
666 | * capable of s4ecd4ed then the edac_cap would | |
667 | * not have that capability. | |
668 | */ | |
669 | unsigned long scrub_cap; /* chipset scrub capabilities */ | |
670 | enum scrub_type scrub_mode; /* current scrub mode */ | |
671 | ||
672 | /* Translates sdram memory scrub rate given in bytes/sec to the | |
673 | internal representation and configures whatever else needs | |
674 | to be configured. | |
675 | */ | |
676 | int (*set_sdram_scrub_rate) (struct mem_ctl_info * mci, u32 bw); | |
677 | ||
678 | /* Get the current sdram memory scrub rate from the internal | |
679 | representation and converts it to the closest matching | |
680 | bandwidth in bytes/sec. | |
681 | */ | |
682 | int (*get_sdram_scrub_rate) (struct mem_ctl_info * mci); | |
683 | ||
684 | ||
685 | /* pointer to edac checking routine */ | |
686 | void (*edac_check) (struct mem_ctl_info * mci); | |
687 | ||
688 | /* | |
689 | * Remaps memory pages: controller pages to physical pages. | |
690 | * For most MC's, this will be NULL. | |
691 | */ | |
692 | /* FIXME - why not send the phys page to begin with? */ | |
693 | unsigned long (*ctl_page_to_phys) (struct mem_ctl_info * mci, | |
694 | unsigned long page); | |
695 | int mc_idx; | |
de3910eb | 696 | struct csrow_info **csrows; |
4275be63 MCC |
697 | unsigned nr_csrows, num_cschannel; |
698 | ||
7a623c03 MCC |
699 | /* |
700 | * Memory Controller hierarchy | |
701 | * | |
702 | * There are basically two types of memory controller: the ones that | |
703 | * sees memory sticks ("dimms"), and the ones that sees memory ranks. | |
704 | * All old memory controllers enumerate memories per rank, but most | |
705 | * of the recent drivers enumerate memories per DIMM, instead. | |
9713faec | 706 | * When the memory controller is per rank, csbased is true. |
7a623c03 | 707 | */ |
4275be63 MCC |
708 | unsigned n_layers; |
709 | struct edac_mc_layer *layers; | |
9713faec | 710 | bool csbased; |
a7d7d2e1 MCC |
711 | |
712 | /* | |
713 | * DIMM info. Will eventually remove the entire csrows_info some day | |
714 | */ | |
4275be63 | 715 | unsigned tot_dimms; |
de3910eb | 716 | struct dimm_info **dimms; |
a7d7d2e1 | 717 | |
ddeb3547 MCC |
718 | /* |
719 | * FIXME - what about controllers on other busses? - IDs must be | |
720 | * unique. dev pointer should be sufficiently unique, but | |
721 | * BUS:SLOT.FUNC numbers may not be unique. | |
722 | */ | |
fd687502 | 723 | struct device *pdev; |
ddeb3547 MCC |
724 | const char *mod_name; |
725 | const char *mod_ver; | |
726 | const char *ctl_name; | |
727 | const char *dev_name; | |
ddeb3547 | 728 | void *pvt_info; |
ddeb3547 MCC |
729 | unsigned long start_time; /* mci load start time (in jiffies) */ |
730 | ||
4275be63 MCC |
731 | /* |
732 | * drivers shouldn't access those fields directly, as the core | |
733 | * already handles that. | |
734 | */ | |
735 | u32 ce_noinfo_count, ue_noinfo_count; | |
5926ff50 | 736 | u32 ue_mc, ce_mc; |
4275be63 MCC |
737 | u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; |
738 | ||
ddeb3547 MCC |
739 | struct completion complete; |
740 | ||
ddeb3547 MCC |
741 | /* Additional top controller level attributes, but specified |
742 | * by the low level driver. | |
743 | * | |
744 | * Set by the low level driver to provide attributes at the | |
4275be63 | 745 | * controller level. |
ddeb3547 MCC |
746 | * An array of structures, NULL terminated |
747 | * | |
748 | * If attributes are desired, then set to array of attributes | |
749 | * If no attributes are desired, leave NULL | |
750 | */ | |
751 | const struct mcidev_sysfs_attribute *mc_driver_sysfs_attributes; | |
752 | ||
753 | /* work struct for this MC */ | |
754 | struct delayed_work work; | |
755 | ||
c7ef7645 MCC |
756 | /* |
757 | * Used to report an error - by being at the global struct | |
758 | * makes the memory allocated by the EDAC core | |
759 | */ | |
760 | struct edac_raw_error_desc error_desc; | |
761 | ||
ddeb3547 MCC |
762 | /* the internal state of this controller instance */ |
763 | int op_state; | |
452a6bf9 MCC |
764 | |
765 | #ifdef CONFIG_EDAC_DEBUG | |
766 | struct dentry *debugfs; | |
767 | u8 fake_inject_layer[EDAC_MAX_LAYERS]; | |
768 | u32 fake_inject_ue; | |
38ced28b | 769 | u16 fake_inject_count; |
452a6bf9 | 770 | #endif |
ddeb3547 MCC |
771 | }; |
772 | ||
88d84ac9 BP |
773 | /* |
774 | * Maximum number of memory controllers in the coherent fabric. | |
775 | */ | |
776 | #define EDAC_MAX_MCS 16 | |
777 | ||
c0d12172 | 778 | #endif |