1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/*
* Defines, structures, APIs for edac_mc module
*
* (C) 2007 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
* Written by Thayne Harbaugh
* Based on work by Dan Hollis <goemon at anime dot net> and others.
* http://www.anime.net/~goemon/linux-ecc/
*
* NMI handling support added by
* Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>
*
* Refactored for multi-source files:
* Doug Thompson <norsk5@xmission.com>
*
* Please look at Documentation/driver-api/edac.rst for more info about
* EDAC core structs and functions.
*/
#ifndef _EDAC_MC_H_
#define _EDAC_MC_H_
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/nmi.h>
#include <linux/rcupdate.h>
#include <linux/completion.h>
#include <linux/kobject.h>
#include <linux/platform_device.h>
#include <linux/workqueue.h>
#include <linux/edac.h>
#if PAGE_SHIFT < 20
#define PAGES_TO_MiB(pages) ((pages) >> (20 - PAGE_SHIFT))
#define MiB_TO_PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
#else /* PAGE_SHIFT > 20 */
#define PAGES_TO_MiB(pages) ((pages) << (PAGE_SHIFT - 20))
#define MiB_TO_PAGES(mb) ((mb) >> (PAGE_SHIFT - 20))
#endif
#define edac_printk(level, prefix, fmt, arg...) \
printk(level "EDAC " prefix ": " fmt, ##arg)
#define edac_mc_printk(mci, level, fmt, arg...) \
printk(level "EDAC MC%d: " fmt, mci->mc_idx, ##arg)
#define edac_mc_chipset_printk(mci, level, prefix, fmt, arg...) \
printk(level "EDAC " prefix " MC%d: " fmt, mci->mc_idx, ##arg)
#define edac_device_printk(ctl, level, fmt, arg...) \
printk(level "EDAC DEVICE%d: " fmt, ctl->dev_idx, ##arg)
#define edac_pci_printk(ctl, level, fmt, arg...) \
printk(level "EDAC PCI%d: " fmt, ctl->pci_idx, ##arg)
/* prefixes for edac_printk() and edac_mc_printk() */
#define EDAC_MC "MC"
#define EDAC_PCI "PCI"
#define EDAC_DEBUG "DEBUG"
extern const char * const edac_mem_types[];
#ifdef CONFIG_EDAC_DEBUG
extern int edac_debug_level;
#define edac_dbg(level, fmt, ...) \
do { \
if (level <= edac_debug_level) \
edac_printk(KERN_DEBUG, EDAC_DEBUG, \
"%s: " fmt, __func__, ##__VA_ARGS__); \
} while (0)
#else /* !CONFIG_EDAC_DEBUG */
#define edac_dbg(level, fmt, ...) \
do { \
if (0) \
edac_printk(KERN_DEBUG, EDAC_DEBUG, \
"%s: " fmt, __func__, ##__VA_ARGS__); \
} while (0)
#endif /* !CONFIG_EDAC_DEBUG */
#define PCI_VEND_DEV(vend, dev) PCI_VENDOR_ID_ ## vend, \
PCI_DEVICE_ID_ ## vend ## _ ## dev
#define edac_dev_name(dev) (dev)->dev_name
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
/**
* edac_mc_alloc() - Allocate and partially fill a struct &mem_ctl_info.
*
* @mc_num: Memory controller number
* @n_layers: Number of MC hierarchy layers
* @layers: Describes each layer as seen by the Memory Controller
* @sz_pvt: size of private storage needed
*
*
* Everything is kmalloc'ed as one big chunk - more efficient.
* Only can be used if all structures have the same lifetime - otherwise
* you have to allocate and initialize your own structures.
*
* Use edac_mc_free() to free mc structures allocated by this function.
*
* .. note::
*
* drivers handle multi-rank memories in different ways: in some
* drivers, one multi-rank memory stick is mapped as one entry, while, in
* others, a single multi-rank memory stick would be mapped into several
* entries. Currently, this function will allocate multiple struct dimm_info
* on such scenarios, as grouping the multiple ranks require drivers change.
*
* Returns:
* On success, return a pointer to struct mem_ctl_info pointer;
* %NULL otherwise
*/
struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
unsigned int n_layers,
struct edac_mc_layer *layers,
unsigned int sz_pvt);
/**
* edac_get_owner - Return the owner's mod_name of EDAC MC
*
* Returns:
* Pointer to mod_name string when EDAC MC is owned. NULL otherwise.
*/
extern const char *edac_get_owner(void);
/*
* edac_mc_add_mc_with_groups() - Insert the @mci structure into the mci
* global list and create sysfs entries associated with @mci structure.
*
* @mci: pointer to the mci structure to be added to the list
* @groups: optional attribute groups for the driver-specific sysfs entries
*
* Returns:
* 0 on Success, or an error code on failure
*/
extern int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
const struct attribute_group **groups);
#define edac_mc_add_mc(mci) edac_mc_add_mc_with_groups(mci, NULL)
/**
* edac_mc_free() - Frees a previously allocated @mci structure
*
* @mci: pointer to a struct mem_ctl_info structure
*/
extern void edac_mc_free(struct mem_ctl_info *mci);
/**
* edac_has_mcs() - Check if any MCs have been allocated.
*
* Returns:
* True if MC instances have been registered successfully.
* False otherwise.
*/
extern bool edac_has_mcs(void);
/**
* edac_mc_find() - Search for a mem_ctl_info structure whose index is @idx.
*
* @idx: index to be seek
*
* If found, return a pointer to the structure.
* Else return NULL.
*/
extern struct mem_ctl_info *edac_mc_find(int idx);
/**
* find_mci_by_dev() - Scan list of controllers looking for the one that
* manages the @dev device.
*
* @dev: pointer to a struct device related with the MCI
*
* Returns: on success, returns a pointer to struct &mem_ctl_info;
* %NULL otherwise.
*/
extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
/**
* edac_mc_del_mc() - Remove sysfs entries for mci structure associated with
* @dev and remove mci structure from global list.
*
* @dev: Pointer to struct &device representing mci structure to remove.
*
* Returns: pointer to removed mci structure, or %NULL if device not found.
*/
extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
/**
* edac_mc_find_csrow_by_page() - Ancillary routine to identify what csrow
* contains a memory page.
*
* @mci: pointer to a struct mem_ctl_info structure
* @page: memory page to find
*
* Returns: on success, returns the csrow. -1 if not found.
*/
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
/**
* edac_raw_mc_handle_error() - Reports a memory event to userspace without
* doing anything to discover the error location.
*
* @type: severity of the error (CE/UE/Fatal)
* @mci: a struct mem_ctl_info pointer
* @e: error description
*
* This raw function is used internally by edac_mc_handle_error(). It should
* only be called directly when the hardware error come directly from BIOS,
* like in the case of APEI GHES driver.
*/
void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
struct edac_raw_error_desc *e);
/**
* edac_mc_handle_error() - Reports a memory event to userspace.
*
* @type: severity of the error (CE/UE/Fatal)
* @mci: a struct mem_ctl_info pointer
* @error_count: Number of errors of the same type
* @page_frame_number: mem page where the error occurred
* @offset_in_page: offset of the error inside the page
* @syndrome: ECC syndrome
* @top_layer: Memory layer[0] position
* @mid_layer: Memory layer[1] position
* @low_layer: Memory layer[2] position
* @msg: Message meaningful to the end users that
* explains the event
* @other_detail: Technical details about the event that
* may help hardware manufacturers and
* EDAC developers to analyse the event
*/
void edac_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
const u16 error_count,
const unsigned long page_frame_number,
const unsigned long offset_in_page,
const unsigned long syndrome,
const int top_layer,
const int mid_layer,
const int low_layer,
const char *msg,
const char *other_detail);
/*
* edac misc APIs
*/
extern char *edac_op_state_to_string(int op_state);
#endif /* _EDAC_MC_H_ */
|
