Release 4.14 drivers/edac/edac_pci.h
/*
* 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/completion.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;
struct bus_type *edac_subsys; /* pointer to subsystem */
/* 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;
};
#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);
}
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/* 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);
}
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/*
* 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);
}
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#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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