mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
162 lines
4.6 KiB
162 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Functions corresponding to string type attributes under BIOS String GUID for use with |
|
* dell-wmi-sysman |
|
* |
|
* Copyright (c) 2020 Dell Inc. |
|
*/ |
|
|
|
#include "dell-wmi-sysman.h" |
|
|
|
enum string_properties {MIN_LEN = 6, MAX_LEN}; |
|
|
|
get_instance_id(str); |
|
|
|
static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
|
{ |
|
int instance_id = get_str_instance_id(kobj); |
|
union acpi_object *obj; |
|
ssize_t ret; |
|
|
|
if (instance_id < 0) |
|
return -EIO; |
|
|
|
/* need to use specific instance_id and guid combination to get right data */ |
|
obj = get_wmiobj_pointer(instance_id, DELL_WMI_BIOS_STRING_ATTRIBUTE_GUID); |
|
if (!obj) |
|
return -EIO; |
|
if (obj->package.elements[CURRENT_VAL].type != ACPI_TYPE_STRING) { |
|
kfree(obj); |
|
return -EINVAL; |
|
} |
|
ret = snprintf(buf, PAGE_SIZE, "%s\n", obj->package.elements[CURRENT_VAL].string.pointer); |
|
kfree(obj); |
|
return ret; |
|
} |
|
|
|
/** |
|
* validate_str_input() - Validate input of current_value against min and max lengths |
|
* @instance_id: The instance on which input is validated |
|
* @buf: Input value |
|
*/ |
|
static int validate_str_input(int instance_id, const char *buf) |
|
{ |
|
int in_len = strlen(buf); |
|
|
|
if ((in_len < wmi_priv.str_data[instance_id].min_length) || |
|
(in_len > wmi_priv.str_data[instance_id].max_length)) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
attribute_s_property_show(display_name_language_code, str); |
|
static struct kobj_attribute str_displ_langcode = |
|
__ATTR_RO(display_name_language_code); |
|
|
|
attribute_s_property_show(display_name, str); |
|
static struct kobj_attribute str_displ_name = |
|
__ATTR_RO(display_name); |
|
|
|
attribute_s_property_show(default_value, str); |
|
static struct kobj_attribute str_default_val = |
|
__ATTR_RO(default_value); |
|
|
|
attribute_property_store(current_value, str); |
|
static struct kobj_attribute str_current_val = |
|
__ATTR_RW_MODE(current_value, 0600); |
|
|
|
attribute_s_property_show(dell_modifier, str); |
|
static struct kobj_attribute str_modifier = |
|
__ATTR_RO(dell_modifier); |
|
|
|
attribute_n_property_show(min_length, str); |
|
static struct kobj_attribute str_min_length = |
|
__ATTR_RO(min_length); |
|
|
|
attribute_n_property_show(max_length, str); |
|
static struct kobj_attribute str_max_length = |
|
__ATTR_RO(max_length); |
|
|
|
static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, |
|
char *buf) |
|
{ |
|
return sprintf(buf, "string\n"); |
|
} |
|
static struct kobj_attribute str_type = |
|
__ATTR_RO(type); |
|
|
|
static struct attribute *str_attrs[] = { |
|
&str_displ_langcode.attr, |
|
&str_displ_name.attr, |
|
&str_default_val.attr, |
|
&str_current_val.attr, |
|
&str_modifier.attr, |
|
&str_min_length.attr, |
|
&str_max_length.attr, |
|
&str_type.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group str_attr_group = { |
|
.attrs = str_attrs, |
|
}; |
|
|
|
int alloc_str_data(void) |
|
{ |
|
int ret = 0; |
|
|
|
wmi_priv.str_instances_count = get_instance_count(DELL_WMI_BIOS_STRING_ATTRIBUTE_GUID); |
|
wmi_priv.str_data = kcalloc(wmi_priv.str_instances_count, |
|
sizeof(struct str_data), GFP_KERNEL); |
|
if (!wmi_priv.str_data) { |
|
wmi_priv.str_instances_count = 0; |
|
ret = -ENOMEM; |
|
} |
|
return ret; |
|
} |
|
|
|
/** |
|
* populate_str_data() - Populate all properties of an instance under string attribute |
|
* @str_obj: ACPI object with integer data |
|
* @instance_id: The instance to enumerate |
|
* @attr_name_kobj: The parent kernel object |
|
*/ |
|
int populate_str_data(union acpi_object *str_obj, int instance_id, struct kobject *attr_name_kobj) |
|
{ |
|
wmi_priv.str_data[instance_id].attr_name_kobj = attr_name_kobj; |
|
strlcpy_attr(wmi_priv.str_data[instance_id].attribute_name, |
|
str_obj[ATTR_NAME].string.pointer); |
|
strlcpy_attr(wmi_priv.str_data[instance_id].display_name_language_code, |
|
str_obj[DISPL_NAME_LANG_CODE].string.pointer); |
|
strlcpy_attr(wmi_priv.str_data[instance_id].display_name, |
|
str_obj[DISPLAY_NAME].string.pointer); |
|
strlcpy_attr(wmi_priv.str_data[instance_id].default_value, |
|
str_obj[DEFAULT_VAL].string.pointer); |
|
strlcpy_attr(wmi_priv.str_data[instance_id].dell_modifier, |
|
str_obj[MODIFIER].string.pointer); |
|
wmi_priv.str_data[instance_id].min_length = (uintptr_t)str_obj[MIN_LEN].string.pointer; |
|
wmi_priv.str_data[instance_id].max_length = (uintptr_t) str_obj[MAX_LEN].string.pointer; |
|
|
|
return sysfs_create_group(attr_name_kobj, &str_attr_group); |
|
} |
|
|
|
/** |
|
* exit_str_attributes() - Clear all attribute data |
|
* |
|
* Clears all data allocated for this group of attributes |
|
*/ |
|
void exit_str_attributes(void) |
|
{ |
|
int instance_id; |
|
|
|
for (instance_id = 0; instance_id < wmi_priv.str_instances_count; instance_id++) { |
|
if (wmi_priv.str_data[instance_id].attr_name_kobj) |
|
sysfs_remove_group(wmi_priv.str_data[instance_id].attr_name_kobj, |
|
&str_attr_group); |
|
} |
|
wmi_priv.str_instances_count = 0; |
|
|
|
kfree(wmi_priv.str_data); |
|
wmi_priv.str_data = NULL; |
|
}
|
|
|