mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Here's the branch of chrome platform changes for v4.4. Some have been queued up for the full 4.3 release cycle since I forgot to send them in for that round (rebased early on to deal with fixes conflicts). Most of these enable EC communication stuff -- Pixel 2015 support, enabling building for ARM64 platforms, and a few fixes for memory leaks. There's also a patch in here to allow reading/writing the verified boot context, which depends on a sysfs patch acked by Greg. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJWQWj/AAoJEIwa5zzehBx3figQAJuZK+2PDMeOe3hg38WEHpAA NVaSkZss2VLN8SQCJ8BqB/xoM2lm3GSef2R705m7s20/FsPP7rcJZoeeNkWUK+rn Dc01uJpVwGVtBIjst0FkxS+3xBeUrX6QLQyAnxQV4SIOg4t1EtZvgxK/4wnE726H BV0bTsUHKo0+FSrtI/QoHFkSFbUBansQ7JuN00YOfuwJPdhKgpInbJPqVkmRAYqI ylFFiTUR946SNDMUvmDnd37I2FrIzxslNTBu/oKl0DKI7DPmN3ITvX2JqnnuxktA ru7TWbny+oa2TQAwynYxBq9hpMFHMVVbtDPXE/7MisfL4+KUaSE0e95b4ONfG7yZ oxzf6S1RxzhA0Eo/bFZ0i29DZ4ogR8ql65RNolWJg13XACrPVyGrTWW5ZFe6xbI9 HS13oBOHXIllSDfq9QjMRtNHAv268/oTiF8LXLPrxSCYllGZnKL7g9Ae9dFqOdXx mnoqYtVPsaErek4ktqOZIMRY5mXpX2JyR642PjGbK71IjRKmGvvRqpee+iCpF7ew OR80tAq56/R3NQqp5pgReshglOwQsLdu99spSc+6anjdeSb85ujM2jwXGjLNHwDi 9XpyIAXox5dy3CX8LqgqryIKp/vqRd4q1vugKXLL1dBMSAm/QltjqPWxB2fCRCve IqNEhz4EI6uhJVeqDSNo =dv1O -----END PGP SIGNATURE----- Merge tag 'chrome-platform-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform Pull chrome platform updates from Olof Johansson: "Here's the branch of chrome platform changes for v4.4. Some have been queued up for the full 4.3 release cycle since I forgot to send them in for that round (rebased early on to deal with fixes conflicts). Most of these enable EC communication stuff -- Pixel 2015 support, enabling building for ARM64 platforms, and a few fixes for memory leaks. There's also a patch in here to allow reading/writing the verified boot context, which depends on a sysfs patch acked by Greg" * tag 'chrome-platform-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform: platform/chrome: Fix i2c-designware adapter name platform/chrome: Support reading/writing the vboot context sysfs: Support is_visible() on binary attributes platform/chrome: cros_ec: Fix possible leak in led_rgb_store() platform/chrome: cros_ec: Fix leak in sequence_store() platform/chrome: Enable Chrome platforms on 64-bit ARM platform/chrome: cros_ec_dev - Add a platform device ID table platform/chrome: cros_ec_lpc - Add support for Google Pixel 2 platform/chrome: cros_ec_lpc - Use existing function to check EC result platform/chrome: Make depends on MFD_CROS_EC instead CROS_EC_PROTO Revert "platform/chrome: Don't make CHROME_PLATFORMS depends on X86 || ARM"
531 lines
14 KiB
C
531 lines
14 KiB
C
/*
|
|
* sysfs.h - definitions for the device driver filesystem
|
|
*
|
|
* Copyright (c) 2001,2002 Patrick Mochel
|
|
* Copyright (c) 2004 Silicon Graphics, Inc.
|
|
* Copyright (c) 2007 SUSE Linux Products GmbH
|
|
* Copyright (c) 2007 Tejun Heo <teheo@suse.de>
|
|
*
|
|
* Please see Documentation/filesystems/sysfs.txt for more information.
|
|
*/
|
|
|
|
#ifndef _SYSFS_H_
|
|
#define _SYSFS_H_
|
|
|
|
#include <linux/kernfs.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/list.h>
|
|
#include <linux/lockdep.h>
|
|
#include <linux/kobject_ns.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/atomic.h>
|
|
|
|
struct kobject;
|
|
struct module;
|
|
struct bin_attribute;
|
|
enum kobj_ns_type;
|
|
|
|
struct attribute {
|
|
const char *name;
|
|
umode_t mode;
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
bool ignore_lockdep:1;
|
|
struct lock_class_key *key;
|
|
struct lock_class_key skey;
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* sysfs_attr_init - initialize a dynamically allocated sysfs attribute
|
|
* @attr: struct attribute to initialize
|
|
*
|
|
* Initialize a dynamically allocated struct attribute so we can
|
|
* make lockdep happy. This is a new requirement for attributes
|
|
* and initially this is only needed when lockdep is enabled.
|
|
* Lockdep gives a nice error when your attribute is added to
|
|
* sysfs if you don't have this.
|
|
*/
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
#define sysfs_attr_init(attr) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
\
|
|
(attr)->key = &__key; \
|
|
} while (0)
|
|
#else
|
|
#define sysfs_attr_init(attr) do {} while (0)
|
|
#endif
|
|
|
|
/**
|
|
* struct attribute_group - data structure used to declare an attribute group.
|
|
* @name: Optional: Attribute group name
|
|
* If specified, the attribute group will be created in
|
|
* a new subdirectory with this name.
|
|
* @is_visible: Optional: Function to return permissions associated with an
|
|
* attribute of the group. Will be called repeatedly for each
|
|
* non-binary attribute in the group. Only read/write
|
|
* permissions as well as SYSFS_PREALLOC are accepted. Must
|
|
* return 0 if an attribute is not visible. The returned value
|
|
* will replace static permissions defined in struct attribute.
|
|
* @is_bin_visible:
|
|
* Optional: Function to return permissions associated with a
|
|
* binary attribute of the group. Will be called repeatedly
|
|
* for each binary attribute in the group. Only read/write
|
|
* permissions as well as SYSFS_PREALLOC are accepted. Must
|
|
* return 0 if a binary attribute is not visible. The returned
|
|
* value will replace static permissions defined in
|
|
* struct bin_attribute.
|
|
* @attrs: Pointer to NULL terminated list of attributes.
|
|
* @bin_attrs: Pointer to NULL terminated list of binary attributes.
|
|
* Either attrs or bin_attrs or both must be provided.
|
|
*/
|
|
struct attribute_group {
|
|
const char *name;
|
|
umode_t (*is_visible)(struct kobject *,
|
|
struct attribute *, int);
|
|
umode_t (*is_bin_visible)(struct kobject *,
|
|
struct bin_attribute *, int);
|
|
struct attribute **attrs;
|
|
struct bin_attribute **bin_attrs;
|
|
};
|
|
|
|
/**
|
|
* Use these macros to make defining attributes easier. See include/linux/device.h
|
|
* for examples..
|
|
*/
|
|
|
|
#define SYSFS_PREALLOC 010000
|
|
|
|
#define __ATTR(_name, _mode, _show, _store) { \
|
|
.attr = {.name = __stringify(_name), \
|
|
.mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define __ATTR_PREALLOC(_name, _mode, _show, _store) { \
|
|
.attr = {.name = __stringify(_name), \
|
|
.mode = SYSFS_PREALLOC | VERIFY_OCTAL_PERMISSIONS(_mode) },\
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define __ATTR_RO(_name) { \
|
|
.attr = { .name = __stringify(_name), .mode = S_IRUGO }, \
|
|
.show = _name##_show, \
|
|
}
|
|
|
|
#define __ATTR_WO(_name) { \
|
|
.attr = { .name = __stringify(_name), .mode = S_IWUSR }, \
|
|
.store = _name##_store, \
|
|
}
|
|
|
|
#define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO), \
|
|
_name##_show, _name##_store)
|
|
|
|
#define __ATTR_NULL { .attr = { .name = NULL } }
|
|
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
#define __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode, \
|
|
.ignore_lockdep = true }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
#else
|
|
#define __ATTR_IGNORE_LOCKDEP __ATTR
|
|
#endif
|
|
|
|
#define __ATTRIBUTE_GROUPS(_name) \
|
|
static const struct attribute_group *_name##_groups[] = { \
|
|
&_name##_group, \
|
|
NULL, \
|
|
}
|
|
|
|
#define ATTRIBUTE_GROUPS(_name) \
|
|
static const struct attribute_group _name##_group = { \
|
|
.attrs = _name##_attrs, \
|
|
}; \
|
|
__ATTRIBUTE_GROUPS(_name)
|
|
|
|
struct file;
|
|
struct vm_area_struct;
|
|
|
|
struct bin_attribute {
|
|
struct attribute attr;
|
|
size_t size;
|
|
void *private;
|
|
ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *,
|
|
char *, loff_t, size_t);
|
|
ssize_t (*write)(struct file *, struct kobject *, struct bin_attribute *,
|
|
char *, loff_t, size_t);
|
|
int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
|
|
struct vm_area_struct *vma);
|
|
};
|
|
|
|
/**
|
|
* sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute
|
|
* @attr: struct bin_attribute to initialize
|
|
*
|
|
* Initialize a dynamically allocated struct bin_attribute so we
|
|
* can make lockdep happy. This is a new requirement for
|
|
* attributes and initially this is only needed when lockdep is
|
|
* enabled. Lockdep gives a nice error when your attribute is
|
|
* added to sysfs if you don't have this.
|
|
*/
|
|
#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
|
|
|
|
/* macros to create static binary attributes easier */
|
|
#define __BIN_ATTR(_name, _mode, _read, _write, _size) { \
|
|
.attr = { .name = __stringify(_name), .mode = _mode }, \
|
|
.read = _read, \
|
|
.write = _write, \
|
|
.size = _size, \
|
|
}
|
|
|
|
#define __BIN_ATTR_RO(_name, _size) { \
|
|
.attr = { .name = __stringify(_name), .mode = S_IRUGO }, \
|
|
.read = _name##_read, \
|
|
.size = _size, \
|
|
}
|
|
|
|
#define __BIN_ATTR_RW(_name, _size) __BIN_ATTR(_name, \
|
|
(S_IWUSR | S_IRUGO), _name##_read, \
|
|
_name##_write, _size)
|
|
|
|
#define __BIN_ATTR_NULL __ATTR_NULL
|
|
|
|
#define BIN_ATTR(_name, _mode, _read, _write, _size) \
|
|
struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \
|
|
_write, _size)
|
|
|
|
#define BIN_ATTR_RO(_name, _size) \
|
|
struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size)
|
|
|
|
#define BIN_ATTR_RW(_name, _size) \
|
|
struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)
|
|
|
|
struct sysfs_ops {
|
|
ssize_t (*show)(struct kobject *, struct attribute *, char *);
|
|
ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t);
|
|
};
|
|
|
|
#ifdef CONFIG_SYSFS
|
|
|
|
int __must_check sysfs_create_dir_ns(struct kobject *kobj, const void *ns);
|
|
void sysfs_remove_dir(struct kobject *kobj);
|
|
int __must_check sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name,
|
|
const void *new_ns);
|
|
int __must_check sysfs_move_dir_ns(struct kobject *kobj,
|
|
struct kobject *new_parent_kobj,
|
|
const void *new_ns);
|
|
int __must_check sysfs_create_mount_point(struct kobject *parent_kobj,
|
|
const char *name);
|
|
void sysfs_remove_mount_point(struct kobject *parent_kobj,
|
|
const char *name);
|
|
|
|
int __must_check sysfs_create_file_ns(struct kobject *kobj,
|
|
const struct attribute *attr,
|
|
const void *ns);
|
|
int __must_check sysfs_create_files(struct kobject *kobj,
|
|
const struct attribute **attr);
|
|
int __must_check sysfs_chmod_file(struct kobject *kobj,
|
|
const struct attribute *attr, umode_t mode);
|
|
void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr,
|
|
const void *ns);
|
|
bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr);
|
|
void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
|
|
|
|
int __must_check sysfs_create_bin_file(struct kobject *kobj,
|
|
const struct bin_attribute *attr);
|
|
void sysfs_remove_bin_file(struct kobject *kobj,
|
|
const struct bin_attribute *attr);
|
|
|
|
int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
|
|
const char *name);
|
|
int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
|
|
struct kobject *target,
|
|
const char *name);
|
|
void sysfs_remove_link(struct kobject *kobj, const char *name);
|
|
|
|
int sysfs_rename_link_ns(struct kobject *kobj, struct kobject *target,
|
|
const char *old_name, const char *new_name,
|
|
const void *new_ns);
|
|
|
|
void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
|
|
const char *name);
|
|
|
|
int __must_check sysfs_create_group(struct kobject *kobj,
|
|
const struct attribute_group *grp);
|
|
int __must_check sysfs_create_groups(struct kobject *kobj,
|
|
const struct attribute_group **groups);
|
|
int sysfs_update_group(struct kobject *kobj,
|
|
const struct attribute_group *grp);
|
|
void sysfs_remove_group(struct kobject *kobj,
|
|
const struct attribute_group *grp);
|
|
void sysfs_remove_groups(struct kobject *kobj,
|
|
const struct attribute_group **groups);
|
|
int sysfs_add_file_to_group(struct kobject *kobj,
|
|
const struct attribute *attr, const char *group);
|
|
void sysfs_remove_file_from_group(struct kobject *kobj,
|
|
const struct attribute *attr, const char *group);
|
|
int sysfs_merge_group(struct kobject *kobj,
|
|
const struct attribute_group *grp);
|
|
void sysfs_unmerge_group(struct kobject *kobj,
|
|
const struct attribute_group *grp);
|
|
int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
|
|
struct kobject *target, const char *link_name);
|
|
void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
|
|
const char *link_name);
|
|
int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj,
|
|
struct kobject *target_kobj,
|
|
const char *target_name);
|
|
|
|
void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
|
|
|
|
int __must_check sysfs_init(void);
|
|
|
|
static inline void sysfs_enable_ns(struct kernfs_node *kn)
|
|
{
|
|
return kernfs_enable_ns(kn);
|
|
}
|
|
|
|
#else /* CONFIG_SYSFS */
|
|
|
|
static inline int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_dir(struct kobject *kobj)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_rename_dir_ns(struct kobject *kobj,
|
|
const char *new_name, const void *new_ns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_move_dir_ns(struct kobject *kobj,
|
|
struct kobject *new_parent_kobj,
|
|
const void *new_ns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_create_mount_point(struct kobject *parent_kobj,
|
|
const char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_mount_point(struct kobject *parent_kobj,
|
|
const char *name)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_create_file_ns(struct kobject *kobj,
|
|
const struct attribute *attr,
|
|
const void *ns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_create_files(struct kobject *kobj,
|
|
const struct attribute **attr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_chmod_file(struct kobject *kobj,
|
|
const struct attribute *attr, umode_t mode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_file_ns(struct kobject *kobj,
|
|
const struct attribute *attr,
|
|
const void *ns)
|
|
{
|
|
}
|
|
|
|
static inline bool sysfs_remove_file_self(struct kobject *kobj,
|
|
const struct attribute *attr)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void sysfs_remove_files(struct kobject *kobj,
|
|
const struct attribute **attr)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_create_bin_file(struct kobject *kobj,
|
|
const struct bin_attribute *attr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_bin_file(struct kobject *kobj,
|
|
const struct bin_attribute *attr)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_create_link(struct kobject *kobj,
|
|
struct kobject *target, const char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_create_link_nowarn(struct kobject *kobj,
|
|
struct kobject *target,
|
|
const char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_rename_link_ns(struct kobject *k, struct kobject *t,
|
|
const char *old_name,
|
|
const char *new_name, const void *ns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_delete_link(struct kobject *k, struct kobject *t,
|
|
const char *name)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_create_group(struct kobject *kobj,
|
|
const struct attribute_group *grp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_create_groups(struct kobject *kobj,
|
|
const struct attribute_group **groups)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int sysfs_update_group(struct kobject *kobj,
|
|
const struct attribute_group *grp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_group(struct kobject *kobj,
|
|
const struct attribute_group *grp)
|
|
{
|
|
}
|
|
|
|
static inline void sysfs_remove_groups(struct kobject *kobj,
|
|
const struct attribute_group **groups)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_add_file_to_group(struct kobject *kobj,
|
|
const struct attribute *attr, const char *group)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_file_from_group(struct kobject *kobj,
|
|
const struct attribute *attr, const char *group)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_merge_group(struct kobject *kobj,
|
|
const struct attribute_group *grp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_unmerge_group(struct kobject *kobj,
|
|
const struct attribute_group *grp)
|
|
{
|
|
}
|
|
|
|
static inline int sysfs_add_link_to_group(struct kobject *kobj,
|
|
const char *group_name, struct kobject *target,
|
|
const char *link_name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_remove_link_from_group(struct kobject *kobj,
|
|
const char *group_name, const char *link_name)
|
|
{
|
|
}
|
|
|
|
static inline int __compat_only_sysfs_link_entry_to_kobj(
|
|
struct kobject *kobj,
|
|
struct kobject *target_kobj,
|
|
const char *target_name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_notify(struct kobject *kobj, const char *dir,
|
|
const char *attr)
|
|
{
|
|
}
|
|
|
|
static inline int __must_check sysfs_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sysfs_enable_ns(struct kernfs_node *kn)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
static inline int __must_check sysfs_create_file(struct kobject *kobj,
|
|
const struct attribute *attr)
|
|
{
|
|
return sysfs_create_file_ns(kobj, attr, NULL);
|
|
}
|
|
|
|
static inline void sysfs_remove_file(struct kobject *kobj,
|
|
const struct attribute *attr)
|
|
{
|
|
sysfs_remove_file_ns(kobj, attr, NULL);
|
|
}
|
|
|
|
static inline int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
|
|
const char *old_name, const char *new_name)
|
|
{
|
|
return sysfs_rename_link_ns(kobj, target, old_name, new_name, NULL);
|
|
}
|
|
|
|
static inline void sysfs_notify_dirent(struct kernfs_node *kn)
|
|
{
|
|
kernfs_notify(kn);
|
|
}
|
|
|
|
static inline struct kernfs_node *sysfs_get_dirent(struct kernfs_node *parent,
|
|
const unsigned char *name)
|
|
{
|
|
return kernfs_find_and_get(parent, name);
|
|
}
|
|
|
|
static inline struct kernfs_node *sysfs_get(struct kernfs_node *kn)
|
|
{
|
|
kernfs_get(kn);
|
|
return kn;
|
|
}
|
|
|
|
static inline void sysfs_put(struct kernfs_node *kn)
|
|
{
|
|
kernfs_put(kn);
|
|
}
|
|
|
|
#endif /* _SYSFS_H_ */
|