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Release 4.11 drivers/edac/edac_pci.h

Directory: drivers/edac
/*
 * 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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Directory: drivers/edac
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