include/linux/enclosure.h

   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_ */