/*
* Defines , structures , APIs for edac_pci and edac_pci_sysfs
*
* ( 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_PCI_H_
#define _EDAC_PCI_H_
#include <linux/device.h>
#include <linux/edac.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#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;
/* 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) */
/* 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;
};
#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 != 0 xff) {
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 != 0 xffff) {
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 != 0 xffffffff) {
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 */
/*
* edac_pci APIs
*/
/**
* edac_pci_alloc_ctl_info :
* The alloc ( ) function for the ' edac_pci ' control info
* structure .
*
* @ sz_pvt : size of the private info at struct & edac_pci_ctl_info
* @ edac_pci_name : name of the PCI device
*
* The chip driver will allocate one of these for each
* edac_pci it is going to control / register with the EDAC CORE .
*
* Returns : a pointer to struct & edac_pci_ctl_info on success ; % NULL otherwise .
*/
extern struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt,
const char *edac_pci_name);
/**
* edac_pci_free_ctl_info ( ) :
* Last action on the pci control structure .
*
* @ pci : pointer to struct & edac_pci_ctl_info
*
* Calls the remove sysfs information , which will unregister
* this control struct ' s kobj . When that kobj ' s ref count
* goes to zero , its release function will be call and then
* kfree ( ) the memory .
*/
extern void edac_pci_free_ctl_info(struct edac_pci_ctl_info *pci);
/**
* edac_pci_alloc_index : Allocate a unique PCI index number
*
* Returns :
* allocated index number
*
*/
extern int edac_pci_alloc_index(void );
/**
* edac_pci_add_device ( ) : Insert the ' edac_dev ' structure into the
* edac_pci global list and create sysfs entries associated with
* edac_pci structure .
*
* @ pci : pointer to the edac_device structure to be added to the list
* @ edac_idx : A unique numeric identifier to be assigned to the
* ' edac_pci ' structure .
*
* Returns :
* 0 on Success , or an error code on failure
*/
extern int edac_pci_add_device(struct edac_pci_ctl_info *pci, int edac_idx);
/**
* edac_pci_del_device ( )
* Remove sysfs entries for specified edac_pci structure and
* then remove edac_pci structure from global list
*
* @ dev :
* Pointer to ' struct device ' representing edac_pci structure
* to remove
*
* Returns :
* Pointer to removed edac_pci structure ,
* or % NULL if device not found
*/
extern struct edac_pci_ctl_info *edac_pci_del_device(struct device *dev);
/**
* edac_pci_create_generic_ctl ( )
* A generic constructor for a PCI parity polling device
* Some systems have more than one domain of PCI busses .
* For systems with one domain , then this API will
* provide for a generic poller .
*
* @ dev : pointer to struct & device ;
* @ mod_name : name of the PCI device
*
* This routine calls the edac_pci_alloc_ctl_info ( ) for
* the generic device , with default values
*
* Returns : Pointer to struct & edac_pci_ctl_info on success , % NULL on
* failure .
*/
extern struct edac_pci_ctl_info *edac_pci_create_generic_ctl(
struct device *dev,
const char *mod_name);
/**
* edac_pci_release_generic_ctl
* The release function of a generic EDAC PCI polling device
*
* @ pci : pointer to struct & edac_pci_ctl_info
*/
extern void edac_pci_release_generic_ctl(struct edac_pci_ctl_info *pci);
/**
* edac_pci_create_sysfs
* Create the controls / attributes for the specified EDAC PCI device
*
* @ pci : pointer to struct & edac_pci_ctl_info
*/
extern int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci);
/**
* edac_pci_remove_sysfs ( )
* remove the controls and attributes for this EDAC PCI device
*
* @ pci : pointer to struct & edac_pci_ctl_info
*/
extern void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci);
#endif
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