include/linux/enclosure.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Enclosure Services
   4  *
   5  * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
   6  *
   7 **-----------------------------------------------------------------------------
   8 **
   9 **
  10 **-----------------------------------------------------------------------------
  11 */
  12 #ifndef _LINUX_ENCLOSURE_H_
  13 #define _LINUX_ENCLOSURE_H_
  14
  15 #include <linux/device.h>
  16 #include <linux/list.h>
  17
  18 /* A few generic types ... taken from ses-2 */
  19 enum enclosure_component_type {
  20         ENCLOSURE_COMPONENT_DEVICE = 0x01,
  21         ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS = 0x07,
  22         ENCLOSURE_COMPONENT_SCSI_TARGET_PORT = 0x14,
  23         ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT = 0x15,
  24         ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17,
  25         ENCLOSURE_COMPONENT_SAS_EXPANDER = 0x18,
  26 };
  27
  28 /* ses-2 common element status */
  29 enum enclosure_status {
  30         ENCLOSURE_STATUS_UNSUPPORTED = 0,
  31         ENCLOSURE_STATUS_OK,
  32         ENCLOSURE_STATUS_CRITICAL,
  33         ENCLOSURE_STATUS_NON_CRITICAL,
  34         ENCLOSURE_STATUS_UNRECOVERABLE,
  35         ENCLOSURE_STATUS_NOT_INSTALLED,
  36         ENCLOSURE_STATUS_UNKNOWN,
  37         ENCLOSURE_STATUS_UNAVAILABLE,
  38         /* last element for counting purposes */
  39         ENCLOSURE_STATUS_MAX
  40 };
  41
  42 /* SFF-8485 activity light settings */
  43 enum enclosure_component_setting {
  44         ENCLOSURE_SETTING_DISABLED = 0,
  45         ENCLOSURE_SETTING_ENABLED = 1,
  46         ENCLOSURE_SETTING_BLINK_A_ON_OFF = 2,
  47         ENCLOSURE_SETTING_BLINK_A_OFF_ON = 3,
  48         ENCLOSURE_SETTING_BLINK_B_ON_OFF = 6,
  49         ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7,
  50 };
  51
  52 struct enclosure_device;
  53 struct enclosure_component;
  54 struct enclosure_component_callbacks {
  55         void (*get_status)(struct enclosure_device *,
  56                              struct enclosure_component *);
  57         int (*set_status)(struct enclosure_device *,
  58                           struct enclosure_component *,
  59                           enum enclosure_status);
  60         void (*get_fault)(struct enclosure_device *,
  61                           struct enclosure_component *);
  62         int (*set_fault)(struct enclosure_device *,
  63                          struct enclosure_component *,
  64                          enum enclosure_component_setting);
  65         void (*get_active)(struct enclosure_device *,
  66                            struct enclosure_component *);
  67         int (*set_active)(struct enclosure_device *,
  68                           struct enclosure_component *,
  69                           enum enclosure_component_setting);
  70         void (*get_locate)(struct enclosure_device *,
  71                            struct enclosure_component *);
  72         int (*set_locate)(struct enclosure_device *,
  73                           struct enclosure_component *,
  74                           enum enclosure_component_setting);
  75         void (*get_power_status)(struct enclosure_device *,
  76                                  struct enclosure_component *);
  77         int (*set_power_status)(struct enclosure_device *,
  78                                 struct enclosure_component *,
  79                                 int);
  80         int (*show_id)(struct enclosure_device *, char *buf);
  81 };
  82
  83
  84 struct enclosure_component {
  85         void *scratch;
  86         struct device cdev;
  87         struct device *dev;
  88         enum enclosure_component_type type;
  89         int number;
  90         int fault;
  91         int active;
  92         int locate;
  93         int slot;
  94         enum enclosure_status status;
  95         int power_status;
  96 };
  97
  98 struct enclosure_device {
  99         void *scratch;
 100         struct list_head node;
 101         struct device edev;
 102         struct enclosure_component_callbacks *cb;
 103         int components;
 104         struct enclosure_component component[];
 105 };
 106
 107 static inline struct enclosure_device *
 108 to_enclosure_device(struct device *dev)
 109 {
 110         return container_of(dev, struct enclosure_device, edev);
 111 }
 112
 113 static inline struct enclosure_component *
 114 to_enclosure_component(struct device *dev)
 115 {
 116         return container_of(dev, struct enclosure_component, cdev);
 117 }
 118
 119 struct enclosure_device *
 120 enclosure_register(struct device *, const char *, int,
 121                    struct enclosure_component_callbacks *);
 122 void enclosure_unregister(struct enclosure_device *);
 123 struct enclosure_component *
 124 enclosure_component_alloc(struct enclosure_device *, unsigned int,
 125                           enum enclosure_component_type, const char *);
 126 int enclosure_component_register(struct enclosure_component *);
 127 int enclosure_add_device(struct enclosure_device *enclosure, int component,
 128                          struct device *dev);
 129 int enclosure_remove_device(struct enclosure_device *, struct device *);
 130 struct enclosure_device *enclosure_find(struct device *dev,
 131                                         struct enclosure_device *start);
 132 int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *),
 133                               void *data);
 134
 135 #endif /* _LINUX_ENCLOSURE_H_ */