/*
* Defines, structures, APIs for edac_core 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>
*
*/
#ifndef _EDAC_CORE_H_
#define _EDAC_CORE_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/sysdev.h>
#include <linux/workqueue.h>
#include <linux/edac.h>
#define EDAC_DEVICE_NAME_LEN 31
#define EDAC_ATTRIB_VALUE_LEN 15
#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 *edac_mem_types[];
#ifdef CONFIG_EDAC_DEBUG
extern int edac_debug_level;
#define edac_debug_printk(level, fmt, arg...) \
do { \
if (level <= edac_debug_level) \
edac_printk(KERN_DEBUG, EDAC_DEBUG, \
"%s: " fmt, __func__, ##arg); \
} while (0)
#define debugf0( ... ) edac_debug_printk(0, __VA_ARGS__ )
#define debugf1( ... ) edac_debug_printk(1, __VA_ARGS__ )
#define debugf2( ... ) edac_debug_printk(2, __VA_ARGS__ )
#define debugf3( ... ) edac_debug_printk(3, __VA_ARGS__ )
#define debugf4( ... ) edac_debug_printk(4, __VA_ARGS__ )
#else /* !CONFIG_EDAC_DEBUG */
#define debugf0( ... )
#define debugf1( ... )
#define debugf2( ... )
#define debugf3( ... )
#define debugf4( ... )
#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
/*
* The following are the structures to provide for a generic
* or abstract 'edac_device'. This set of structures and the
* code that implements the APIs for the same, provide for
* registering EDAC type devices which are NOT standard memory.
*
* CPU caches (L1 and L2)
* DMA engines
* Core CPU swithces
* Fabric switch units
* PCIe interface controllers
* other EDAC/ECC type devices that can be monitored for
* errors, etc.
*
* It allows for a 2 level set of hiearchry. For example:
*
* cache could be composed of L1, L2 and L3 levels of cache.
* Each CPU core would have its own L1 cache, while sharing
* L2 and maybe L3 caches.
*
* View them arranged, via the sysfs presentation:
* /sys/devices/system/edac/..
*
* mc/ <existing memory device directory>
* cpu/cpu0/.. <L1 and L2 block directory>
* /L1-cache/ce_count
* /ue_count
* /L2-cache/ce_count
* /ue_count
* cpu/cpu1/.. <L1 and L2 block directory>
* /L1-cache/ce_count
* /ue_count
* /L2-cache/ce_count
* /ue_count
* ...
*
* the L1 and L2 directories would be "edac_device_block's"
*/
struct edac_device_counter {
u32 ue_count;
u32 ce_count;
};
/* forward reference */
struct edac_device_ctl_info;
struct edac_device_block;
/* edac_dev_sysfs_attribute structure
* used for driver sysfs attributes in mem_ctl_info
* for extra controls and attributes:
* like high level error Injection controls
*/
struct edac_dev_sysfs_attribute {
struct attribute attr;
ssize_t (*show)(struct edac_device_ctl_info *, char *);
ssize_t (*store)(struct edac_device_ctl_info *, const char *, size_t);
};
/* edac_dev_sysfs_block_attribute structure
*
* used in leaf 'block' nodes for adding controls/attributes
*
* each block in each instance of the containing control structure
* can have an array of the following. The show and store functions
* will be filled in with the show/store function in the
* low level driver.
*
* The 'value' field will be the actual value field used for
* counting
*/
struct edac_dev_sysfs_block_attribute {
struct attribute attr;
ssize_t (*show)(struct kobject *, struct attribute *, char *);
ssize_t (*store)(struct kobject *, struct attribute *,
const char *, size_t);
struct edac_device_block *block;
unsigned int value;
};
/* device block control structure */
struct edac_device_block {
struct edac_device_instance *instance; /* Up Pointer */
char name[EDAC_DEVICE_NAME_LEN + 1];
struct edac_device_counter counters; /* basic UE and CE counters */
int nr_attribs; /* how many attributes */
/* this block's attributes, could be NULL */
struct edac_dev_sysfs_block_attribute *block_attributes;
/* edac sysfs device control */
struct kobject kobj;
};
/* device instance control structure */
struct edac_device_instance {
struct edac_device_ctl_info *ctl; /* Up pointer */
char name[EDAC_DEVICE_NAME_LEN + 4];
struct edac_device_counter counters; /* instance counters */
u32 nr_blocks; /* how many blocks */
struct edac_device_block *blocks; /* block array */
/* edac sysfs device control */
struct kobject kobj;
};
/*
* Abstract edac_device control info structure
*
*/
struct edac_device_ctl_info {
/* for global list of edac_device_ctl_info structs */
struct list_head link;
struct module *owner; /* Module owner of this control struct */
int dev_idx;
/* Per instance controls for this edac_device */
int log_ue; /* boolean for logging UEs */
int log_ce; /* boolean for logging CEs */
int panic_on_ue; /* boolean for panic'ing on an UE */
unsigned poll_msec; /* number of milliseconds to poll interval */
unsigned long delay; /* number of jiffies for poll_msec */
/* Additional top controller level attributes, but specified
* by the low level driver.
*
* Set by the low level driver to provide attributes at the
* controller level, same level as 'ue_count' and 'ce_count' above.
* An array of structures, NULL terminated
*
* If attributes are desired, then set to array of attributes
* If no attributes are desired, leave NULL
*/
struct edac_dev_sysfs_attribute *sysfs_attributes;
/* pointer to main 'edac' class in sysfs */
struct sysdev_class *edac_class;
/* the internal state of this controller instance */
int op_state;
/* work struct for this instance */
struct delayed_work work;
/* pointer to edac polling checking routine:
* If NOT NULL: points to polling check routine
* If NULL: Then assumes INTERRUPT operation, where
* MC driver will receive events
*/
void (*edac_check) (struct edac_device_ctl_info * edac_dev);
struct device *dev; /* pointer to device structure */
const char *mod_name; /* module name */
const char *ctl_name; /* edac controller name */
const char *dev_name; /* pci/platform/etc... name */
void *pvt_info; /* pointer to 'private driver' info */
unsigned long start_time; /* edac_device load start time (jiffies) */
struct completion removal_complete;
/* sysfs top name under 'edac' directory
* and instance name:
* cpu/cpu0/...
* cpu/cpu1/...
* cpu/cpu2/...
* ...
*/
char name[EDAC_DEVICE_NAME_LEN + 1];
/* Number of instances supported on this control structure
* and the array of those instances
*/
u32 nr_instances;
struct edac_device_instance *instances;
/* Event counters for the this whole EDAC Device */
struct edac_device_counter counters;
/* edac sysfs device control for the 'name'
* device this structure controls
*/
struct kobject kobj;
};
/* To get from the instance's wq to the beginning of the ctl structure */
#define to_edac_mem_ctl_work(w) \
container_of(w, struct mem_ctl_info, work)
#define to_edac_device_ctl_work(w) \
container_of(w,struct edac_device_ctl_info,work)
/*
* The alloc() and free() functions for the 'edac_device' control info
* structure. A MC driver will allocate one of these for each edac_device
* it is going to control/register with the EDAC CORE.
*/
extern struct edac_device_ctl_info *edac_device_alloc_ctl_info(
unsigned sizeof_private,
char *edac_device_name, unsigned nr_instances,
char *edac_block_name, unsigned nr_blocks,
unsigned offset_value,
struct edac_dev_sysfs_block_attribute *block_attributes,
unsigned nr_attribs,
int device_index);
/* The offset value can be:
* -1 indicating no offset value
* 0 for zero-based block numbers
* 1 for 1-based block number
* other for other-based block number
*/
#define BLOCK_OFFSET_VALUE_OFF ((unsigned) -1)
extern void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info);
#ifdef CONFIG_PCI
struct edac_pci_counter {
atomic_t pe_count;
atomic_t npe_count;
};
/*
* Abstract edac_pci control info structure
*
*/
struct edac_pci_ctl_info {
/* for global list of edac_pci_ctl_info structs */
struct list_head link;
int pci_idx;
struct sysdev_class *edac_class; /* pointer to class */
/* the internal state of this controller instance */
int op_state;
/* work struct for this instance */
struct delayed_work work;
/* pointer to edac polling checking routine:
* If NOT NULL: points to polling check routine
* If NULL: Then assumes INTERRUPT operation, where
* MC driver will receive events
*/
void (*edac_check) (struct edac_pci_ctl_info * edac_dev);
struct device *dev; /* pointer to device structure */
const char *mod_name; /* module name */
const char *ctl_name; /* edac controller name */
const char *dev_name; /* pci/platform/etc... name */
void *pvt_info; /* pointer to 'private driver' info */
unsigned long start_time; /* edac_pci load start time (jiffies) */
struct completion complete;
/* sysfs top name under 'edac' directory
* and instance name:
* cpu/cpu0/...
* cpu/cpu1/...
* cpu/cpu2/...
* ...
*/
char name[EDAC_DEVICE_NAME_LEN + 1];
/* Event counters for the this whole EDAC Device */
struct edac_pci_counter counters;
/* edac sysfs device control for the 'name'
* device this structure controls
*/
struct kobject kobj;
struct completion kobj_complete;
};
#define to_edac_pci_ctl_work(w) \
container_of(w, struct edac_pci_ctl_info,work)
/* write all or some bits in a byte-register*/
static inline void pci_write_bits8(struct pci_dev *pdev, int offset, u8 value,
u8 mask)
{
if (mask != 0xff) {
u8 buf;
pci_read_config_byte(pdev, offset, &buf);
value &= mask;
buf &= ~mask;
value |= buf;
}
pci_write_config_byte(pdev, offset, value);
}
/* write all or some bits in a word-register*/
static inline void pci_write_bits16(struct pci_dev *pdev, int offset,
u16 value, u16 mask)
{
if (mask != 0xffff) {
u16 buf;
pci_read_config_word(pdev, offset, &buf);
value &= mask;
buf &= ~mask;
value |= buf;
}
pci_write_config_word(pdev, offset, value);
}
/*
* pci_write_bits32
*
* edac local routine to do pci_write_config_dword, but adds
* a mask parameter. If mask is all ones, ignore the mask.
* Otherwise utilize the mask to isolate specified bits
*
* write all or some bits in a dword-register
*/
static inline void pci_write_bits32(struct pci_dev *pdev, int offset,
u32 value, u32 mask)
{
if (mask != 0xffffffff) {
u32 buf;
pci_read_config_dword(pdev, offset, &buf);
value &= mask;
buf &= ~mask;
value |= buf;
}
pci_write_config_dword(pdev, offset, value);
}
#endif /* CONFIG_PCI */
extern struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
unsigned nr_chans, int edac_index);
extern int edac_mc_add_mc(struct mem_ctl_info *mci);
extern void edac_mc_free(struct mem_ctl_info *mci);
extern struct mem_ctl_info *edac_mc_find(int idx);
extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
/*
* The no info errors are used when error overflows are reported.
* There are a limited number of error logging registers that can
* be exausted. When all registers are exhausted and an additional
* error occurs then an error overflow register records that an
* error occurred and the type of error, but doesn't have any
* further information. The ce/ue versions make for cleaner
* reporting logic and function interface - reduces conditional
* statement clutter and extra function arguments.
*/
extern void edac_mc_handle_ce(struct mem_ctl_info *mci,
unsigned long page_frame_number,
unsigned long offset_in_page,
unsigned long syndrome, int row, int channel,
const char *msg);
extern void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci,
const char *msg);
extern void edac_mc_handle_ue(struct mem_ctl_info *mci,
unsigned long page_frame_number,
unsigned long offset_in_page, int row,
const char *msg);
extern void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci,
const char *msg);
extern void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci, unsigned int csrow,
unsigned int channel0, unsigned int channel1,
char *msg);
extern void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, unsigned int csrow,
unsigned int channel, char *msg);
/*
* edac_device APIs
*/
extern int edac_device_add_device(struct edac_device_ctl_info *edac_dev);
extern struct edac_device_ctl_info *edac_device_del_device(struct device *dev);
extern void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
int inst_nr, int block_nr, const char *msg);
extern void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
int inst_nr, int block_nr, const char *msg);
extern int edac_device_alloc_index(void);
/*
* edac_pci APIs
*/
extern struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
const char *edac_pci_name);
extern void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci);
extern void edac_pci_reset_delay_period(struct edac_pci_ctl_info *pci,
unsigned long value);
extern int edac_pci_alloc_index(void);
extern int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx);
extern struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev);
extern struct edac_pci_ctl_info *edac_pci_create_generic_ctl(
struct device *dev,
const char *mod_name);
extern void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci);
extern int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci);
extern void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci);
/*
* edac misc APIs
*/
extern char *edac_op_state_to_string(int op_state);
#endif /* _EDAC_CORE_H_ */
