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TOMOYO Linux Cross Reference
Linux/include/linux/enclosure.h

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  1 /*
  2  * Enclosure Services
  3  *
  4  * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
  5  *
  6 **-----------------------------------------------------------------------------
  7 **
  8 **  This program is free software; you can redistribute it and/or
  9 **  modify it under the terms of the GNU General Public License
 10 **  version 2 as published by the Free Software Foundation.
 11 **
 12 **  This program is distributed in the hope that it will be useful,
 13 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15 **  GNU General Public License for more details.
 16 **
 17 **  You should have received a copy of the GNU General Public License
 18 **  along with this program; if not, write to the Free Software
 19 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 20 **
 21 **-----------------------------------------------------------------------------
 22 */
 23 #ifndef _LINUX_ENCLOSURE_H_
 24 #define _LINUX_ENCLOSURE_H_
 25 
 26 #include <linux/device.h>
 27 #include <linux/list.h>
 28 
 29 /* A few generic types ... taken from ses-2 */
 30 enum enclosure_component_type {
 31         ENCLOSURE_COMPONENT_DEVICE = 0x01,
 32         ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS = 0x07,
 33         ENCLOSURE_COMPONENT_SCSI_TARGET_PORT = 0x14,
 34         ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT = 0x15,
 35         ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17,
 36         ENCLOSURE_COMPONENT_SAS_EXPANDER = 0x18,
 37 };
 38 
 39 /* ses-2 common element status */
 40 enum enclosure_status {
 41         ENCLOSURE_STATUS_UNSUPPORTED = 0,
 42         ENCLOSURE_STATUS_OK,
 43         ENCLOSURE_STATUS_CRITICAL,
 44         ENCLOSURE_STATUS_NON_CRITICAL,
 45         ENCLOSURE_STATUS_UNRECOVERABLE,
 46         ENCLOSURE_STATUS_NOT_INSTALLED,
 47         ENCLOSURE_STATUS_UNKNOWN,
 48         ENCLOSURE_STATUS_UNAVAILABLE,
 49         /* last element for counting purposes */
 50         ENCLOSURE_STATUS_MAX
 51 };
 52 
 53 /* SFF-8485 activity light settings */
 54 enum enclosure_component_setting {
 55         ENCLOSURE_SETTING_DISABLED = 0,
 56         ENCLOSURE_SETTING_ENABLED = 1,
 57         ENCLOSURE_SETTING_BLINK_A_ON_OFF = 2,
 58         ENCLOSURE_SETTING_BLINK_A_OFF_ON = 3,
 59         ENCLOSURE_SETTING_BLINK_B_ON_OFF = 6,
 60         ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7,
 61 };
 62 
 63 struct enclosure_device;
 64 struct enclosure_component;
 65 struct enclosure_component_callbacks {
 66         void (*get_status)(struct enclosure_device *,
 67                              struct enclosure_component *);
 68         int (*set_status)(struct enclosure_device *,
 69                           struct enclosure_component *,
 70                           enum enclosure_status);
 71         void (*get_fault)(struct enclosure_device *,
 72                           struct enclosure_component *);
 73         int (*set_fault)(struct enclosure_device *,
 74                          struct enclosure_component *,
 75                          enum enclosure_component_setting);
 76         void (*get_active)(struct enclosure_device *,
 77                            struct enclosure_component *);
 78         int (*set_active)(struct enclosure_device *,
 79                           struct enclosure_component *,
 80                           enum enclosure_component_setting);
 81         void (*get_locate)(struct enclosure_device *,
 82                            struct enclosure_component *);
 83         int (*set_locate)(struct enclosure_device *,
 84                           struct enclosure_component *,
 85                           enum enclosure_component_setting);
 86         void (*get_power_status)(struct enclosure_device *,
 87                                  struct enclosure_component *);
 88         int (*set_power_status)(struct enclosure_device *,
 89                                 struct enclosure_component *,
 90                                 int);
 91         int (*show_id)(struct enclosure_device *, char *buf);
 92 };
 93 
 94 
 95 struct enclosure_component {
 96         void *scratch;
 97         struct device cdev;
 98         struct device *dev;
 99         enum enclosure_component_type type;
100         int number;
101         int fault;
102         int active;
103         int locate;
104         int slot;
105         enum enclosure_status status;
106         int power_status;
107 };
108 
109 struct enclosure_device {
110         void *scratch;
111         struct list_head node;
112         struct device edev;
113         struct enclosure_component_callbacks *cb;
114         int components;
115         struct enclosure_component component[0];
116 };
117 
118 static inline struct enclosure_device *
119 to_enclosure_device(struct device *dev)
120 {
121         return container_of(dev, struct enclosure_device, edev);
122 }
123 
124 static inline struct enclosure_component *
125 to_enclosure_component(struct device *dev)
126 {
127         return container_of(dev, struct enclosure_component, cdev);
128 }
129 
130 struct enclosure_device *
131 enclosure_register(struct device *, const char *, int,
132                    struct enclosure_component_callbacks *);
133 void enclosure_unregister(struct enclosure_device *);
134 struct enclosure_component *
135 enclosure_component_alloc(struct enclosure_device *, unsigned int,
136                           enum enclosure_component_type, const char *);
137 int enclosure_component_register(struct enclosure_component *);
138 int enclosure_add_device(struct enclosure_device *enclosure, int component,
139                          struct device *dev);
140 int enclosure_remove_device(struct enclosure_device *, struct device *);
141 struct enclosure_device *enclosure_find(struct device *dev,
142                                         struct enclosure_device *start);
143 int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *),
144                               void *data);
145 
146 #endif /* _LINUX_ENCLOSURE_H_ */
147 

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