1e6c7b3e1SJorge Lopez // SPDX-License-Identifier: GPL-2.0
2e6c7b3e1SJorge Lopez /*
3e6c7b3e1SJorge Lopez * Functions corresponding to string type attributes under
4e6c7b3e1SJorge Lopez * HP_WMI_BIOS_STRING_GUID for use with hp-bioscfg driver.
5e6c7b3e1SJorge Lopez *
6e6c7b3e1SJorge Lopez * Copyright (c) 2022 HP Development Company, L.P.
7e6c7b3e1SJorge Lopez */
8e6c7b3e1SJorge Lopez
9e6c7b3e1SJorge Lopez #include "bioscfg.h"
10e6c7b3e1SJorge Lopez
11e6c7b3e1SJorge Lopez #define WMI_STRING_TYPE "HPBIOS_BIOSString"
12e6c7b3e1SJorge Lopez
13e6c7b3e1SJorge Lopez GET_INSTANCE_ID(string);
14e6c7b3e1SJorge Lopez
current_value_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)15e6c7b3e1SJorge Lopez static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
16e6c7b3e1SJorge Lopez {
17e6c7b3e1SJorge Lopez int instance_id = get_string_instance_id(kobj);
18e6c7b3e1SJorge Lopez
19e6c7b3e1SJorge Lopez if (instance_id < 0)
20e6c7b3e1SJorge Lopez return -EIO;
21e6c7b3e1SJorge Lopez
22e6c7b3e1SJorge Lopez return sysfs_emit(buf, "%s\n",
23e6c7b3e1SJorge Lopez bioscfg_drv.string_data[instance_id].current_value);
24e6c7b3e1SJorge Lopez }
25e6c7b3e1SJorge Lopez
26e6c7b3e1SJorge Lopez /**
27e6c7b3e1SJorge Lopez * validate_string_input() -
28e6c7b3e1SJorge Lopez * Validate input of current_value against min and max lengths
29e6c7b3e1SJorge Lopez *
30e6c7b3e1SJorge Lopez * @instance_id: The instance on which input is validated
31e6c7b3e1SJorge Lopez * @buf: Input value
32e6c7b3e1SJorge Lopez */
validate_string_input(int instance_id,const char * buf)33e6c7b3e1SJorge Lopez static int validate_string_input(int instance_id, const char *buf)
34e6c7b3e1SJorge Lopez {
35e6c7b3e1SJorge Lopez int in_len = strlen(buf);
36e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
37e6c7b3e1SJorge Lopez
38e6c7b3e1SJorge Lopez /* BIOS treats it as a read only attribute */
39e6c7b3e1SJorge Lopez if (string_data->common.is_readonly)
40e6c7b3e1SJorge Lopez return -EIO;
41e6c7b3e1SJorge Lopez
42e6c7b3e1SJorge Lopez if (in_len < string_data->min_length || in_len > string_data->max_length)
43e6c7b3e1SJorge Lopez return -ERANGE;
44e6c7b3e1SJorge Lopez
45e6c7b3e1SJorge Lopez return 0;
46e6c7b3e1SJorge Lopez }
47e6c7b3e1SJorge Lopez
update_string_value(int instance_id,char * attr_value)48e6c7b3e1SJorge Lopez static void update_string_value(int instance_id, char *attr_value)
49e6c7b3e1SJorge Lopez {
50e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
51e6c7b3e1SJorge Lopez
52e6c7b3e1SJorge Lopez /* Write settings to BIOS */
53e6c7b3e1SJorge Lopez strscpy(string_data->current_value, attr_value, sizeof(string_data->current_value));
54e6c7b3e1SJorge Lopez }
55e6c7b3e1SJorge Lopez
56e6c7b3e1SJorge Lopez /*
57e6c7b3e1SJorge Lopez * ATTRIBUTE_S_COMMON_PROPERTY_SHOW(display_name_language_code, string);
58e6c7b3e1SJorge Lopez * static struct kobj_attribute string_display_langcode =
59e6c7b3e1SJorge Lopez * __ATTR_RO(display_name_language_code);
60e6c7b3e1SJorge Lopez */
61e6c7b3e1SJorge Lopez
62e6c7b3e1SJorge Lopez ATTRIBUTE_S_COMMON_PROPERTY_SHOW(display_name, string);
63e6c7b3e1SJorge Lopez static struct kobj_attribute string_display_name =
64e6c7b3e1SJorge Lopez __ATTR_RO(display_name);
65e6c7b3e1SJorge Lopez
66e6c7b3e1SJorge Lopez ATTRIBUTE_PROPERTY_STORE(current_value, string);
67e6c7b3e1SJorge Lopez static struct kobj_attribute string_current_val =
68e6c7b3e1SJorge Lopez __ATTR_RW_MODE(current_value, 0644);
69e6c7b3e1SJorge Lopez
70e6c7b3e1SJorge Lopez ATTRIBUTE_N_PROPERTY_SHOW(min_length, string);
71e6c7b3e1SJorge Lopez static struct kobj_attribute string_min_length =
72e6c7b3e1SJorge Lopez __ATTR_RO(min_length);
73e6c7b3e1SJorge Lopez
74e6c7b3e1SJorge Lopez ATTRIBUTE_N_PROPERTY_SHOW(max_length, string);
75e6c7b3e1SJorge Lopez static struct kobj_attribute string_max_length =
76e6c7b3e1SJorge Lopez __ATTR_RO(max_length);
77e6c7b3e1SJorge Lopez
type_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)78e6c7b3e1SJorge Lopez static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
79e6c7b3e1SJorge Lopez char *buf)
80e6c7b3e1SJorge Lopez {
81e6c7b3e1SJorge Lopez return sysfs_emit(buf, "string\n");
82e6c7b3e1SJorge Lopez }
83e6c7b3e1SJorge Lopez
84e6c7b3e1SJorge Lopez static struct kobj_attribute string_type =
85e6c7b3e1SJorge Lopez __ATTR_RO(type);
86e6c7b3e1SJorge Lopez
87e6c7b3e1SJorge Lopez static struct attribute *string_attrs[] = {
88e6c7b3e1SJorge Lopez &common_display_langcode.attr,
89e6c7b3e1SJorge Lopez &string_display_name.attr,
90e6c7b3e1SJorge Lopez &string_current_val.attr,
91e6c7b3e1SJorge Lopez &string_min_length.attr,
92e6c7b3e1SJorge Lopez &string_max_length.attr,
93e6c7b3e1SJorge Lopez &string_type.attr,
94e6c7b3e1SJorge Lopez NULL
95e6c7b3e1SJorge Lopez };
96e6c7b3e1SJorge Lopez
97e6c7b3e1SJorge Lopez static const struct attribute_group string_attr_group = {
98e6c7b3e1SJorge Lopez .attrs = string_attrs,
99e6c7b3e1SJorge Lopez };
100e6c7b3e1SJorge Lopez
hp_alloc_string_data(void)101e6c7b3e1SJorge Lopez int hp_alloc_string_data(void)
102e6c7b3e1SJorge Lopez {
103e6c7b3e1SJorge Lopez bioscfg_drv.string_instances_count = hp_get_instance_count(HP_WMI_BIOS_STRING_GUID);
104e6c7b3e1SJorge Lopez bioscfg_drv.string_data = kcalloc(bioscfg_drv.string_instances_count,
105e6c7b3e1SJorge Lopez sizeof(*bioscfg_drv.string_data), GFP_KERNEL);
106e6c7b3e1SJorge Lopez if (!bioscfg_drv.string_data) {
107e6c7b3e1SJorge Lopez bioscfg_drv.string_instances_count = 0;
108e6c7b3e1SJorge Lopez return -ENOMEM;
109e6c7b3e1SJorge Lopez }
110e6c7b3e1SJorge Lopez return 0;
111e6c7b3e1SJorge Lopez }
112e6c7b3e1SJorge Lopez
113e6c7b3e1SJorge Lopez /* Expected Values types associated with each element */
114e6c7b3e1SJorge Lopez static const acpi_object_type expected_string_types[] = {
115e6c7b3e1SJorge Lopez [NAME] = ACPI_TYPE_STRING,
116e6c7b3e1SJorge Lopez [VALUE] = ACPI_TYPE_STRING,
117e6c7b3e1SJorge Lopez [PATH] = ACPI_TYPE_STRING,
118e6c7b3e1SJorge Lopez [IS_READONLY] = ACPI_TYPE_INTEGER,
119e6c7b3e1SJorge Lopez [DISPLAY_IN_UI] = ACPI_TYPE_INTEGER,
120e6c7b3e1SJorge Lopez [REQUIRES_PHYSICAL_PRESENCE] = ACPI_TYPE_INTEGER,
121e6c7b3e1SJorge Lopez [SEQUENCE] = ACPI_TYPE_INTEGER,
122e6c7b3e1SJorge Lopez [PREREQUISITES_SIZE] = ACPI_TYPE_INTEGER,
123e6c7b3e1SJorge Lopez [PREREQUISITES] = ACPI_TYPE_STRING,
124e6c7b3e1SJorge Lopez [SECURITY_LEVEL] = ACPI_TYPE_INTEGER,
125e6c7b3e1SJorge Lopez [STR_MIN_LENGTH] = ACPI_TYPE_INTEGER,
126e6c7b3e1SJorge Lopez [STR_MAX_LENGTH] = ACPI_TYPE_INTEGER,
127e6c7b3e1SJorge Lopez };
128e6c7b3e1SJorge Lopez
hp_populate_string_elements_from_package(union acpi_object * string_obj,int string_obj_count,int instance_id)129e6c7b3e1SJorge Lopez static int hp_populate_string_elements_from_package(union acpi_object *string_obj,
130e6c7b3e1SJorge Lopez int string_obj_count,
131e6c7b3e1SJorge Lopez int instance_id)
132e6c7b3e1SJorge Lopez {
133e6c7b3e1SJorge Lopez char *str_value = NULL;
134e6c7b3e1SJorge Lopez int value_len;
135e6c7b3e1SJorge Lopez int ret = 0;
13680d7ba30SJorge Lopez u32 int_value = 0;
137e6c7b3e1SJorge Lopez int elem;
138e6c7b3e1SJorge Lopez int reqs;
139e6c7b3e1SJorge Lopez int eloc;
140e6c7b3e1SJorge Lopez int size;
141e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
142e6c7b3e1SJorge Lopez
143e6c7b3e1SJorge Lopez if (!string_obj)
144e6c7b3e1SJorge Lopez return -EINVAL;
145e6c7b3e1SJorge Lopez
146e6c7b3e1SJorge Lopez for (elem = 1, eloc = 1; elem < string_obj_count; elem++, eloc++) {
147e6c7b3e1SJorge Lopez /* ONLY look at the first STRING_ELEM_CNT elements */
148e6c7b3e1SJorge Lopez if (eloc == STR_ELEM_CNT)
149e6c7b3e1SJorge Lopez goto exit_string_package;
150e6c7b3e1SJorge Lopez
151e6c7b3e1SJorge Lopez switch (string_obj[elem].type) {
152e6c7b3e1SJorge Lopez case ACPI_TYPE_STRING:
153e6c7b3e1SJorge Lopez if (elem != PREREQUISITES) {
154e6c7b3e1SJorge Lopez ret = hp_convert_hexstr_to_str(string_obj[elem].string.pointer,
155e6c7b3e1SJorge Lopez string_obj[elem].string.length,
156e6c7b3e1SJorge Lopez &str_value, &value_len);
157e6c7b3e1SJorge Lopez
158e6c7b3e1SJorge Lopez if (ret)
159e6c7b3e1SJorge Lopez continue;
160e6c7b3e1SJorge Lopez }
161e6c7b3e1SJorge Lopez break;
162e6c7b3e1SJorge Lopez case ACPI_TYPE_INTEGER:
163e6c7b3e1SJorge Lopez int_value = (u32)string_obj[elem].integer.value;
164e6c7b3e1SJorge Lopez break;
165e6c7b3e1SJorge Lopez default:
166e6c7b3e1SJorge Lopez pr_warn("Unsupported object type [%d]\n", string_obj[elem].type);
167e6c7b3e1SJorge Lopez continue;
168e6c7b3e1SJorge Lopez }
169e6c7b3e1SJorge Lopez
170e6c7b3e1SJorge Lopez /* Check that both expected and read object type match */
171e6c7b3e1SJorge Lopez if (expected_string_types[eloc] != string_obj[elem].type) {
172e6c7b3e1SJorge Lopez pr_err("Error expected type %d for elem %d, but got type %d instead\n",
173e6c7b3e1SJorge Lopez expected_string_types[eloc], elem, string_obj[elem].type);
174467d4163SJorge Lopez kfree(str_value);
175e6c7b3e1SJorge Lopez return -EIO;
176e6c7b3e1SJorge Lopez }
177e6c7b3e1SJorge Lopez
178e6c7b3e1SJorge Lopez /* Assign appropriate element value to corresponding field*/
179e6c7b3e1SJorge Lopez switch (eloc) {
180e6c7b3e1SJorge Lopez case VALUE:
181e6c7b3e1SJorge Lopez strscpy(string_data->current_value,
182e6c7b3e1SJorge Lopez str_value, sizeof(string_data->current_value));
183e6c7b3e1SJorge Lopez break;
184e6c7b3e1SJorge Lopez case PATH:
185e6c7b3e1SJorge Lopez strscpy(string_data->common.path, str_value,
186e6c7b3e1SJorge Lopez sizeof(string_data->common.path));
187e6c7b3e1SJorge Lopez break;
188e6c7b3e1SJorge Lopez case IS_READONLY:
189e6c7b3e1SJorge Lopez string_data->common.is_readonly = int_value;
190e6c7b3e1SJorge Lopez break;
191e6c7b3e1SJorge Lopez case DISPLAY_IN_UI:
192e6c7b3e1SJorge Lopez string_data->common.display_in_ui = int_value;
193e6c7b3e1SJorge Lopez break;
194e6c7b3e1SJorge Lopez case REQUIRES_PHYSICAL_PRESENCE:
195e6c7b3e1SJorge Lopez string_data->common.requires_physical_presence = int_value;
196e6c7b3e1SJorge Lopez break;
197e6c7b3e1SJorge Lopez case SEQUENCE:
198e6c7b3e1SJorge Lopez string_data->common.sequence = int_value;
199e6c7b3e1SJorge Lopez break;
200e6c7b3e1SJorge Lopez case PREREQUISITES_SIZE:
201*08f1f212SJorge Lopez if (int_value > MAX_PREREQUISITES_SIZE) {
202*08f1f212SJorge Lopez pr_warn("Prerequisites size value exceeded the maximum number of elements supported or data may be malformed\n");
203*08f1f212SJorge Lopez int_value = MAX_PREREQUISITES_SIZE;
204*08f1f212SJorge Lopez }
205e6c7b3e1SJorge Lopez string_data->common.prerequisites_size = int_value;
206e6c7b3e1SJorge Lopez
207e6c7b3e1SJorge Lopez /*
208a585400bSJorge Lopez * This step is needed to keep the expected
209e6c7b3e1SJorge Lopez * element list pointing to the right obj[elem].type
210e6c7b3e1SJorge Lopez * when the size is zero. PREREQUISITES
211e6c7b3e1SJorge Lopez * object is omitted by BIOS when the size is
212e6c7b3e1SJorge Lopez * zero.
213e6c7b3e1SJorge Lopez */
214e6c7b3e1SJorge Lopez if (string_data->common.prerequisites_size == 0)
215e6c7b3e1SJorge Lopez eloc++;
216e6c7b3e1SJorge Lopez break;
217e6c7b3e1SJorge Lopez case PREREQUISITES:
218e6c7b3e1SJorge Lopez size = min_t(u32, string_data->common.prerequisites_size,
219e6c7b3e1SJorge Lopez MAX_PREREQUISITES_SIZE);
220e6c7b3e1SJorge Lopez
221e6c7b3e1SJorge Lopez for (reqs = 0; reqs < size; reqs++) {
222e6c7b3e1SJorge Lopez if (elem >= string_obj_count) {
223e6c7b3e1SJorge Lopez pr_err("Error elem-objects package is too small\n");
224e6c7b3e1SJorge Lopez return -EINVAL;
225e6c7b3e1SJorge Lopez }
226e6c7b3e1SJorge Lopez
227e6c7b3e1SJorge Lopez ret = hp_convert_hexstr_to_str(string_obj[elem + reqs].string.pointer,
228e6c7b3e1SJorge Lopez string_obj[elem + reqs].string.length,
229e6c7b3e1SJorge Lopez &str_value, &value_len);
230e6c7b3e1SJorge Lopez
231e6c7b3e1SJorge Lopez if (ret)
232e6c7b3e1SJorge Lopez continue;
233e6c7b3e1SJorge Lopez
234e6c7b3e1SJorge Lopez strscpy(string_data->common.prerequisites[reqs],
235e6c7b3e1SJorge Lopez str_value,
236e6c7b3e1SJorge Lopez sizeof(string_data->common.prerequisites[reqs]));
237e6c7b3e1SJorge Lopez kfree(str_value);
238467d4163SJorge Lopez str_value = NULL;
239e6c7b3e1SJorge Lopez }
240e6c7b3e1SJorge Lopez break;
241e6c7b3e1SJorge Lopez
242e6c7b3e1SJorge Lopez case SECURITY_LEVEL:
243e6c7b3e1SJorge Lopez string_data->common.security_level = int_value;
244e6c7b3e1SJorge Lopez break;
245e6c7b3e1SJorge Lopez case STR_MIN_LENGTH:
246e6c7b3e1SJorge Lopez string_data->min_length = int_value;
247e6c7b3e1SJorge Lopez break;
248e6c7b3e1SJorge Lopez case STR_MAX_LENGTH:
249e6c7b3e1SJorge Lopez string_data->max_length = int_value;
250e6c7b3e1SJorge Lopez break;
251e6c7b3e1SJorge Lopez default:
252e6c7b3e1SJorge Lopez pr_warn("Invalid element: %d found in String attribute or data may be malformed\n", elem);
253e6c7b3e1SJorge Lopez break;
254e6c7b3e1SJorge Lopez }
255e6c7b3e1SJorge Lopez
256e6c7b3e1SJorge Lopez kfree(str_value);
257467d4163SJorge Lopez str_value = NULL;
258e6c7b3e1SJorge Lopez }
259e6c7b3e1SJorge Lopez
260e6c7b3e1SJorge Lopez exit_string_package:
261e6c7b3e1SJorge Lopez kfree(str_value);
262e6c7b3e1SJorge Lopez return 0;
263e6c7b3e1SJorge Lopez }
264e6c7b3e1SJorge Lopez
265e6c7b3e1SJorge Lopez /**
266e6c7b3e1SJorge Lopez * hp_populate_string_package_data() -
267e6c7b3e1SJorge Lopez * Populate all properties of an instance under string attribute
268e6c7b3e1SJorge Lopez *
269e6c7b3e1SJorge Lopez * @string_obj: ACPI object with string data
270e6c7b3e1SJorge Lopez * @instance_id: The instance to enumerate
271e6c7b3e1SJorge Lopez * @attr_name_kobj: The parent kernel object
272e6c7b3e1SJorge Lopez */
hp_populate_string_package_data(union acpi_object * string_obj,int instance_id,struct kobject * attr_name_kobj)273e6c7b3e1SJorge Lopez int hp_populate_string_package_data(union acpi_object *string_obj,
274e6c7b3e1SJorge Lopez int instance_id,
275e6c7b3e1SJorge Lopez struct kobject *attr_name_kobj)
276e6c7b3e1SJorge Lopez {
277e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
278e6c7b3e1SJorge Lopez
279e6c7b3e1SJorge Lopez string_data->attr_name_kobj = attr_name_kobj;
280e6c7b3e1SJorge Lopez
281e6c7b3e1SJorge Lopez hp_populate_string_elements_from_package(string_obj,
282e6c7b3e1SJorge Lopez string_obj->package.count,
283e6c7b3e1SJorge Lopez instance_id);
284e6c7b3e1SJorge Lopez
285e6c7b3e1SJorge Lopez hp_update_attribute_permissions(string_data->common.is_readonly,
286e6c7b3e1SJorge Lopez &string_current_val);
287e6c7b3e1SJorge Lopez hp_friendly_user_name_update(string_data->common.path,
288e6c7b3e1SJorge Lopez attr_name_kobj->name,
289e6c7b3e1SJorge Lopez string_data->common.display_name,
290e6c7b3e1SJorge Lopez sizeof(string_data->common.display_name));
291e6c7b3e1SJorge Lopez return sysfs_create_group(attr_name_kobj, &string_attr_group);
292e6c7b3e1SJorge Lopez }
293e6c7b3e1SJorge Lopez
hp_populate_string_elements_from_buffer(u8 * buffer_ptr,u32 * buffer_size,int instance_id)294e6c7b3e1SJorge Lopez static int hp_populate_string_elements_from_buffer(u8 *buffer_ptr, u32 *buffer_size,
295e6c7b3e1SJorge Lopez int instance_id)
296e6c7b3e1SJorge Lopez {
297e6c7b3e1SJorge Lopez int ret = 0;
298e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
299e6c7b3e1SJorge Lopez
300e6c7b3e1SJorge Lopez /*
301e6c7b3e1SJorge Lopez * Only data relevant to this driver and its functionality is
302e6c7b3e1SJorge Lopez * read. BIOS defines the order in which each * element is
303e6c7b3e1SJorge Lopez * read. Element 0 data is not relevant to this
304e6c7b3e1SJorge Lopez * driver hence it is ignored. For clarity, all element names
305e6c7b3e1SJorge Lopez * (DISPLAY_IN_UI) which defines the order in which is read
306e6c7b3e1SJorge Lopez * and the name matches the variable where the data is stored.
307e6c7b3e1SJorge Lopez *
308e6c7b3e1SJorge Lopez * In earlier implementation, reported errors were ignored
309e6c7b3e1SJorge Lopez * causing the data to remain uninitialized. It is not
310e6c7b3e1SJorge Lopez * possible to determine if data read from BIOS is valid or
311e6c7b3e1SJorge Lopez * not. It is for this reason functions may return a error
312e6c7b3e1SJorge Lopez * without validating the data itself.
313e6c7b3e1SJorge Lopez */
314e6c7b3e1SJorge Lopez
315e6c7b3e1SJorge Lopez // VALUE:
316e6c7b3e1SJorge Lopez ret = hp_get_string_from_buffer(&buffer_ptr, buffer_size, string_data->current_value,
317e6c7b3e1SJorge Lopez sizeof(string_data->current_value));
318e6c7b3e1SJorge Lopez if (ret < 0)
319e6c7b3e1SJorge Lopez goto buffer_exit;
320e6c7b3e1SJorge Lopez
321e6c7b3e1SJorge Lopez // COMMON:
322e6c7b3e1SJorge Lopez ret = hp_get_common_data_from_buffer(&buffer_ptr, buffer_size, &string_data->common);
323e6c7b3e1SJorge Lopez if (ret < 0)
324e6c7b3e1SJorge Lopez goto buffer_exit;
325e6c7b3e1SJorge Lopez
326e6c7b3e1SJorge Lopez // STR_MIN_LENGTH:
327e6c7b3e1SJorge Lopez ret = hp_get_integer_from_buffer(&buffer_ptr, buffer_size,
328e6c7b3e1SJorge Lopez &string_data->min_length);
329e6c7b3e1SJorge Lopez if (ret < 0)
330e6c7b3e1SJorge Lopez goto buffer_exit;
331e6c7b3e1SJorge Lopez
332e6c7b3e1SJorge Lopez // STR_MAX_LENGTH:
333e6c7b3e1SJorge Lopez ret = hp_get_integer_from_buffer(&buffer_ptr, buffer_size,
334e6c7b3e1SJorge Lopez &string_data->max_length);
335e6c7b3e1SJorge Lopez
336e6c7b3e1SJorge Lopez buffer_exit:
337e6c7b3e1SJorge Lopez
338e6c7b3e1SJorge Lopez return ret;
339e6c7b3e1SJorge Lopez }
340e6c7b3e1SJorge Lopez
341e6c7b3e1SJorge Lopez /**
342e6c7b3e1SJorge Lopez * hp_populate_string_buffer_data() -
343e6c7b3e1SJorge Lopez * Populate all properties of an instance under string attribute
344e6c7b3e1SJorge Lopez *
345e6c7b3e1SJorge Lopez * @buffer_ptr: Buffer pointer
346e6c7b3e1SJorge Lopez * @buffer_size: Buffer size
347e6c7b3e1SJorge Lopez * @instance_id: The instance to enumerate
348e6c7b3e1SJorge Lopez * @attr_name_kobj: The parent kernel object
349e6c7b3e1SJorge Lopez */
hp_populate_string_buffer_data(u8 * buffer_ptr,u32 * buffer_size,int instance_id,struct kobject * attr_name_kobj)350e6c7b3e1SJorge Lopez int hp_populate_string_buffer_data(u8 *buffer_ptr, u32 *buffer_size,
351e6c7b3e1SJorge Lopez int instance_id,
352e6c7b3e1SJorge Lopez struct kobject *attr_name_kobj)
353e6c7b3e1SJorge Lopez {
354e6c7b3e1SJorge Lopez struct string_data *string_data = &bioscfg_drv.string_data[instance_id];
355e6c7b3e1SJorge Lopez int ret = 0;
356e6c7b3e1SJorge Lopez
357e6c7b3e1SJorge Lopez string_data->attr_name_kobj = attr_name_kobj;
358e6c7b3e1SJorge Lopez
359e6c7b3e1SJorge Lopez ret = hp_populate_string_elements_from_buffer(buffer_ptr, buffer_size,
360e6c7b3e1SJorge Lopez instance_id);
361e6c7b3e1SJorge Lopez if (ret < 0)
362e6c7b3e1SJorge Lopez return ret;
363e6c7b3e1SJorge Lopez
364e6c7b3e1SJorge Lopez hp_update_attribute_permissions(string_data->common.is_readonly,
365e6c7b3e1SJorge Lopez &string_current_val);
366e6c7b3e1SJorge Lopez hp_friendly_user_name_update(string_data->common.path,
367e6c7b3e1SJorge Lopez attr_name_kobj->name,
368e6c7b3e1SJorge Lopez string_data->common.display_name,
369e6c7b3e1SJorge Lopez sizeof(string_data->common.display_name));
370e6c7b3e1SJorge Lopez
371e6c7b3e1SJorge Lopez return sysfs_create_group(attr_name_kobj, &string_attr_group);
372e6c7b3e1SJorge Lopez }
373e6c7b3e1SJorge Lopez
374e6c7b3e1SJorge Lopez /**
375e6c7b3e1SJorge Lopez * hp_exit_string_attributes() - Clear all attribute data
376e6c7b3e1SJorge Lopez *
377e6c7b3e1SJorge Lopez * Clears all data allocated for this group of attributes
378e6c7b3e1SJorge Lopez */
hp_exit_string_attributes(void)379e6c7b3e1SJorge Lopez void hp_exit_string_attributes(void)
380e6c7b3e1SJorge Lopez {
381e6c7b3e1SJorge Lopez int instance_id;
382e6c7b3e1SJorge Lopez
383e6c7b3e1SJorge Lopez for (instance_id = 0; instance_id < bioscfg_drv.string_instances_count;
384e6c7b3e1SJorge Lopez instance_id++) {
385e6c7b3e1SJorge Lopez struct kobject *attr_name_kobj =
386e6c7b3e1SJorge Lopez bioscfg_drv.string_data[instance_id].attr_name_kobj;
387e6c7b3e1SJorge Lopez
388e6c7b3e1SJorge Lopez if (attr_name_kobj)
389e6c7b3e1SJorge Lopez sysfs_remove_group(attr_name_kobj, &string_attr_group);
390e6c7b3e1SJorge Lopez }
391e6c7b3e1SJorge Lopez bioscfg_drv.string_instances_count = 0;
392e6c7b3e1SJorge Lopez
393e6c7b3e1SJorge Lopez kfree(bioscfg_drv.string_data);
394e6c7b3e1SJorge Lopez bioscfg_drv.string_data = NULL;
395e6c7b3e1SJorge Lopez }
396