2 * Defines, structures, APIs for edac_core module
4 * (C) 2007 Linux Networx (http://lnxi.com)
5 * This file may be distributed under the terms of the
6 * GNU General Public License.
8 * Written by Thayne Harbaugh
9 * Based on work by Dan Hollis <goemon at anime dot net> and others.
10 * http://www.anime.net/~goemon/linux-ecc/
12 * NMI handling support added by
13 * Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>
15 * Refactored for multi-source files:
16 * Doug Thompson <norsk5@xmission.com>
23 #include <linux/kernel.h>
24 #include <linux/types.h>
25 #include <linux/module.h>
26 #include <linux/spinlock.h>
27 #include <linux/smp.h>
28 #include <linux/pci.h>
29 #include <linux/time.h>
30 #include <linux/nmi.h>
31 #include <linux/rcupdate.h>
32 #include <linux/completion.h>
33 #include <linux/kobject.h>
34 #include <linux/platform_device.h>
35 #include <linux/workqueue.h>
36 #include <linux/edac.h>
38 #define EDAC_DEVICE_NAME_LEN 31
39 #define EDAC_ATTRIB_VALUE_LEN 15
42 #define PAGES_TO_MiB(pages) ((pages) >> (20 - PAGE_SHIFT))
43 #define MiB_TO_PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
44 #else /* PAGE_SHIFT > 20 */
45 #define PAGES_TO_MiB(pages) ((pages) << (PAGE_SHIFT - 20))
46 #define MiB_TO_PAGES(mb) ((mb) >> (PAGE_SHIFT - 20))
49 #define edac_printk(level, prefix, fmt, arg...) \
50 printk(level "EDAC " prefix ": " fmt, ##arg)
52 #define edac_mc_printk(mci, level, fmt, arg...) \
53 printk(level "EDAC MC%d: " fmt, mci->mc_idx, ##arg)
55 #define edac_mc_chipset_printk(mci, level, prefix, fmt, arg...) \
56 printk(level "EDAC " prefix " MC%d: " fmt, mci->mc_idx, ##arg)
58 #define edac_device_printk(ctl, level, fmt, arg...) \
59 printk(level "EDAC DEVICE%d: " fmt, ctl->dev_idx, ##arg)
61 #define edac_pci_printk(ctl, level, fmt, arg...) \
62 printk(level "EDAC PCI%d: " fmt, ctl->pci_idx, ##arg)
64 /* prefixes for edac_printk() and edac_mc_printk() */
66 #define EDAC_PCI "PCI"
67 #define EDAC_DEBUG "DEBUG"
69 extern const char * const edac_mem_types[];
71 #ifdef CONFIG_EDAC_DEBUG
72 extern int edac_debug_level;
74 #define edac_dbg(level, fmt, ...) \
76 if (level <= edac_debug_level) \
77 edac_printk(KERN_DEBUG, EDAC_DEBUG, \
78 "%s: " fmt, __func__, ##__VA_ARGS__); \
81 #else /* !CONFIG_EDAC_DEBUG */
83 #define edac_dbg(level, fmt, ...) \
86 edac_printk(KERN_DEBUG, EDAC_DEBUG, \
87 "%s: " fmt, __func__, ##__VA_ARGS__); \
90 #endif /* !CONFIG_EDAC_DEBUG */
92 #define PCI_VEND_DEV(vend, dev) PCI_VENDOR_ID_ ## vend, \
93 PCI_DEVICE_ID_ ## vend ## _ ## dev
95 #define edac_dev_name(dev) (dev)->dev_name
97 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
100 * The following are the structures to provide for a generic
101 * or abstract 'edac_device'. This set of structures and the
102 * code that implements the APIs for the same, provide for
103 * registering EDAC type devices which are NOT standard memory.
105 * CPU caches (L1 and L2)
108 * Fabric switch units
109 * PCIe interface controllers
110 * other EDAC/ECC type devices that can be monitored for
113 * It allows for a 2 level set of hierarchy. For example:
115 * cache could be composed of L1, L2 and L3 levels of cache.
116 * Each CPU core would have its own L1 cache, while sharing
117 * L2 and maybe L3 caches.
119 * View them arranged, via the sysfs presentation:
120 * /sys/devices/system/edac/..
122 * mc/ <existing memory device directory>
123 * cpu/cpu0/.. <L1 and L2 block directory>
128 * cpu/cpu1/.. <L1 and L2 block directory>
135 * the L1 and L2 directories would be "edac_device_block's"
138 struct edac_device_counter {
143 /* forward reference */
144 struct edac_device_ctl_info;
145 struct edac_device_block;
147 /* edac_dev_sysfs_attribute structure
148 * used for driver sysfs attributes in mem_ctl_info
149 * for extra controls and attributes:
150 * like high level error Injection controls
152 struct edac_dev_sysfs_attribute {
153 struct attribute attr;
154 ssize_t (*show)(struct edac_device_ctl_info *, char *);
155 ssize_t (*store)(struct edac_device_ctl_info *, const char *, size_t);
158 /* edac_dev_sysfs_block_attribute structure
160 * used in leaf 'block' nodes for adding controls/attributes
162 * each block in each instance of the containing control structure
163 * can have an array of the following. The show and store functions
164 * will be filled in with the show/store function in the
167 * The 'value' field will be the actual value field used for
170 struct edac_dev_sysfs_block_attribute {
171 struct attribute attr;
172 ssize_t (*show)(struct kobject *, struct attribute *, char *);
173 ssize_t (*store)(struct kobject *, struct attribute *,
174 const char *, size_t);
175 struct edac_device_block *block;
180 /* device block control structure */
181 struct edac_device_block {
182 struct edac_device_instance *instance; /* Up Pointer */
183 char name[EDAC_DEVICE_NAME_LEN + 1];
185 struct edac_device_counter counters; /* basic UE and CE counters */
187 int nr_attribs; /* how many attributes */
189 /* this block's attributes, could be NULL */
190 struct edac_dev_sysfs_block_attribute *block_attributes;
192 /* edac sysfs device control */
196 /* device instance control structure */
197 struct edac_device_instance {
198 struct edac_device_ctl_info *ctl; /* Up pointer */
199 char name[EDAC_DEVICE_NAME_LEN + 4];
201 struct edac_device_counter counters; /* instance counters */
203 u32 nr_blocks; /* how many blocks */
204 struct edac_device_block *blocks; /* block array */
206 /* edac sysfs device control */
212 * Abstract edac_device control info structure
215 struct edac_device_ctl_info {
216 /* for global list of edac_device_ctl_info structs */
217 struct list_head link;
219 struct module *owner; /* Module owner of this control struct */
223 /* Per instance controls for this edac_device */
224 int log_ue; /* boolean for logging UEs */
225 int log_ce; /* boolean for logging CEs */
226 int panic_on_ue; /* boolean for panic'ing on an UE */
227 unsigned poll_msec; /* number of milliseconds to poll interval */
228 unsigned long delay; /* number of jiffies for poll_msec */
230 /* Additional top controller level attributes, but specified
231 * by the low level driver.
233 * Set by the low level driver to provide attributes at the
234 * controller level, same level as 'ue_count' and 'ce_count' above.
235 * An array of structures, NULL terminated
237 * If attributes are desired, then set to array of attributes
238 * If no attributes are desired, leave NULL
240 struct edac_dev_sysfs_attribute *sysfs_attributes;
242 /* pointer to main 'edac' subsys in sysfs */
243 struct bus_type *edac_subsys;
245 /* the internal state of this controller instance */
247 /* work struct for this instance */
248 struct delayed_work work;
250 /* pointer to edac polling checking routine:
251 * If NOT NULL: points to polling check routine
252 * If NULL: Then assumes INTERRUPT operation, where
253 * MC driver will receive events
255 void (*edac_check) (struct edac_device_ctl_info * edac_dev);
257 struct device *dev; /* pointer to device structure */
259 const char *mod_name; /* module name */
260 const char *ctl_name; /* edac controller name */
261 const char *dev_name; /* pci/platform/etc... name */
263 void *pvt_info; /* pointer to 'private driver' info */
265 unsigned long start_time; /* edac_device load start time (jiffies) */
267 struct completion removal_complete;
269 /* sysfs top name under 'edac' directory
276 char name[EDAC_DEVICE_NAME_LEN + 1];
278 /* Number of instances supported on this control structure
279 * and the array of those instances
282 struct edac_device_instance *instances;
284 /* Event counters for the this whole EDAC Device */
285 struct edac_device_counter counters;
287 /* edac sysfs device control for the 'name'
288 * device this structure controls
293 /* To get from the instance's wq to the beginning of the ctl structure */
294 #define to_edac_mem_ctl_work(w) \
295 container_of(w, struct mem_ctl_info, work)
297 #define to_edac_device_ctl_work(w) \
298 container_of(w,struct edac_device_ctl_info,work)
301 * The alloc() and free() functions for the 'edac_device' control info
302 * structure. A MC driver will allocate one of these for each edac_device
303 * it is going to control/register with the EDAC CORE.
305 extern struct edac_device_ctl_info *edac_device_alloc_ctl_info(
306 unsigned sizeof_private,
307 char *edac_device_name, unsigned nr_instances,
308 char *edac_block_name, unsigned nr_blocks,
309 unsigned offset_value,
310 struct edac_dev_sysfs_block_attribute *block_attributes,
314 /* The offset value can be:
315 * -1 indicating no offset value
316 * 0 for zero-based block numbers
317 * 1 for 1-based block number
318 * other for other-based block number
320 #define BLOCK_OFFSET_VALUE_OFF ((unsigned) -1)
322 extern void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info);
326 struct edac_pci_counter {
332 * Abstract edac_pci control info structure
335 struct edac_pci_ctl_info {
336 /* for global list of edac_pci_ctl_info structs */
337 struct list_head link;
341 struct bus_type *edac_subsys; /* pointer to subsystem */
343 /* the internal state of this controller instance */
345 /* work struct for this instance */
346 struct delayed_work work;
348 /* pointer to edac polling checking routine:
349 * If NOT NULL: points to polling check routine
350 * If NULL: Then assumes INTERRUPT operation, where
351 * MC driver will receive events
353 void (*edac_check) (struct edac_pci_ctl_info * edac_dev);
355 struct device *dev; /* pointer to device structure */
357 const char *mod_name; /* module name */
358 const char *ctl_name; /* edac controller name */
359 const char *dev_name; /* pci/platform/etc... name */
361 void *pvt_info; /* pointer to 'private driver' info */
363 unsigned long start_time; /* edac_pci load start time (jiffies) */
365 struct completion complete;
367 /* sysfs top name under 'edac' directory
374 char name[EDAC_DEVICE_NAME_LEN + 1];
376 /* Event counters for the this whole EDAC Device */
377 struct edac_pci_counter counters;
379 /* edac sysfs device control for the 'name'
380 * device this structure controls
383 struct completion kobj_complete;
386 #define to_edac_pci_ctl_work(w) \
387 container_of(w, struct edac_pci_ctl_info,work)
389 /* write all or some bits in a byte-register*/
390 static inline void pci_write_bits8(struct pci_dev *pdev, int offset, u8 value,
396 pci_read_config_byte(pdev, offset, &buf);
402 pci_write_config_byte(pdev, offset, value);
405 /* write all or some bits in a word-register*/
406 static inline void pci_write_bits16(struct pci_dev *pdev, int offset,
409 if (mask != 0xffff) {
412 pci_read_config_word(pdev, offset, &buf);
418 pci_write_config_word(pdev, offset, value);
424 * edac local routine to do pci_write_config_dword, but adds
425 * a mask parameter. If mask is all ones, ignore the mask.
426 * Otherwise utilize the mask to isolate specified bits
428 * write all or some bits in a dword-register
430 static inline void pci_write_bits32(struct pci_dev *pdev, int offset,
433 if (mask != 0xffffffff) {
436 pci_read_config_dword(pdev, offset, &buf);
442 pci_write_config_dword(pdev, offset, value);
445 #endif /* CONFIG_PCI */
447 struct mem_ctl_info *edac_mc_alloc(unsigned mc_num,
449 struct edac_mc_layer *layers,
451 extern int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
452 const struct attribute_group **groups);
453 #define edac_mc_add_mc(mci) edac_mc_add_mc_with_groups(mci, NULL)
454 extern void edac_mc_free(struct mem_ctl_info *mci);
455 extern struct mem_ctl_info *edac_mc_find(int idx);
456 extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
457 extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
458 extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
461 void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
462 struct mem_ctl_info *mci,
463 struct edac_raw_error_desc *e);
465 void edac_mc_handle_error(const enum hw_event_mc_err_type type,
466 struct mem_ctl_info *mci,
467 const u16 error_count,
468 const unsigned long page_frame_number,
469 const unsigned long offset_in_page,
470 const unsigned long syndrome,
475 const char *other_detail);
480 extern int edac_device_add_device(struct edac_device_ctl_info *edac_dev);
481 extern struct edac_device_ctl_info *edac_device_del_device(struct device *dev);
482 extern void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
483 int inst_nr, int block_nr, const char *msg);
484 extern void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
485 int inst_nr, int block_nr, const char *msg);
486 extern int edac_device_alloc_index(void);
487 extern const char *edac_layer_name[];
492 extern struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
493 const char *edac_pci_name);
495 extern void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci);
497 extern void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci,
498 unsigned long value);
500 extern int edac_pci_alloc_index(void);
501 extern int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx);
502 extern struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev);
504 extern struct edac_pci_ctl_info *edac_pci_create_generic_ctl(
506 const char *mod_name);
508 extern void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci);
509 extern int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci);
510 extern void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci);
515 extern char *edac_op_state_to_string(int op_state);
517 #endif /* _EDAC_CORE_H_ */