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[SCSI] enclosure: add support for enclosure services

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The enclosure misc device is really just a library providing sysfs
support for physical enclosure devices and their components.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley
2008-02-03 15:40:56 -06:00
parent 38582a62ec
commit d569d5bb3f
4 changed files with 623 additions and 0 deletions
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129
include/linux/enclosure.h Normal file
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/*
* Enclosure Services
*
* Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
*
**-----------------------------------------------------------------------------
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License
** version 2 as published by the Free Software Foundation.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
*/
#ifndef _LINUX_ENCLOSURE_H_
#define _LINUX_ENCLOSURE_H_
#include <linux/device.h>
#include <linux/list.h>
/* A few generic types ... taken from ses-2 */
enum enclosure_component_type {
ENCLOSURE_COMPONENT_DEVICE = 0x01,
ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17,
};
/* ses-2 common element status */
enum enclosure_status {
ENCLOSURE_STATUS_UNSUPPORTED = 0,
ENCLOSURE_STATUS_OK,
ENCLOSURE_STATUS_CRITICAL,
ENCLOSURE_STATUS_NON_CRITICAL,
ENCLOSURE_STATUS_UNRECOVERABLE,
ENCLOSURE_STATUS_NOT_INSTALLED,
ENCLOSURE_STATUS_UNKNOWN,
ENCLOSURE_STATUS_UNAVAILABLE,
};
/* SFF-8485 activity light settings */
enum enclosure_component_setting {
ENCLOSURE_SETTING_DISABLED = 0,
ENCLOSURE_SETTING_ENABLED = 1,
ENCLOSURE_SETTING_BLINK_A_ON_OFF = 2,
ENCLOSURE_SETTING_BLINK_A_OFF_ON = 3,
ENCLOSURE_SETTING_BLINK_B_ON_OFF = 6,
ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7,
};
struct enclosure_device;
struct enclosure_component;
struct enclosure_component_callbacks {
void (*get_status)(struct enclosure_device *,
struct enclosure_component *);
int (*set_status)(struct enclosure_device *,
struct enclosure_component *,
enum enclosure_status);
void (*get_fault)(struct enclosure_device *,
struct enclosure_component *);
int (*set_fault)(struct enclosure_device *,
struct enclosure_component *,
enum enclosure_component_setting);
void (*get_active)(struct enclosure_device *,
struct enclosure_component *);
int (*set_active)(struct enclosure_device *,
struct enclosure_component *,
enum enclosure_component_setting);
void (*get_locate)(struct enclosure_device *,
struct enclosure_component *);
int (*set_locate)(struct enclosure_device *,
struct enclosure_component *,
enum enclosure_component_setting);
};
struct enclosure_component {
void *scratch;
struct class_device cdev;
enum enclosure_component_type type;
int number;
int fault;
int active;
int locate;
enum enclosure_status status;
};
struct enclosure_device {
void *scratch;
struct list_head node;
struct class_device cdev;
struct enclosure_component_callbacks *cb;
int components;
struct enclosure_component component[0];
};
static inline struct enclosure_device *
to_enclosure_device(struct class_device *dev)
{
return container_of(dev, struct enclosure_device, cdev);
}
static inline struct enclosure_component *
to_enclosure_component(struct class_device *dev)
{
return container_of(dev, struct enclosure_component, cdev);
}
struct enclosure_device *
enclosure_register(struct device *, const char *, int,
struct enclosure_component_callbacks *);
void enclosure_unregister(struct enclosure_device *);
struct enclosure_component *
enclosure_component_register(struct enclosure_device *, unsigned int,
enum enclosure_component_type, const char *);
int enclosure_add_device(struct enclosure_device *enclosure, int component,
struct device *dev);
int enclosure_remove_device(struct enclosure_device *enclosure, int component);
struct enclosure_device *enclosure_find(struct device *dev);
int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *),
void *data);
#endif /* _LINUX_ENCLOSURE_H_ */