xref: /linux/drivers/platform/x86/hp/hp-bioscfg/bioscfg.h (revision fd7d598270724cc787982ea48bbe17ad383a8b7f) 
1 /* SPDX-License-Identifier: GPL-2.0
2  *
3  * Definitions for kernel modules using hp_bioscfg driver
4  *
5  *  Copyright (c) 2022 HP Development Company, L.P.
6  */
7 
8 #ifndef _HP_BIOSCFG_H_
9 #define _HP_BIOSCFG_H_
10 
11 #include <linux/wmi.h>
12 #include <linux/types.h>
13 #include <linux/device.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/nls.h>
17 
18 #define DRIVER_NAME		"hp-bioscfg"
19 
20 #define MAX_BUFF_SIZE		512
21 #define MAX_KEY_MOD_SIZE	256
22 #define MAX_PASSWD_SIZE		64
23 #define MAX_PREREQUISITES_SIZE	20
24 #define MAX_REQ_ELEM_SIZE	128
25 #define MAX_VALUES_SIZE		16
26 #define MAX_ENCODINGS_SIZE	16
27 #define MAX_ELEMENTS_SIZE	16
28 
29 #define SPM_STR_DESC		"Secure Platform Management"
30 #define SPM_STR			"SPM"
31 #define SURE_START_DESC		"Sure Start"
32 #define SURE_START_STR		"Sure_Start"
33 #define SETUP_PASSWD		"Setup Password"
34 #define POWER_ON_PASSWD		"Power-On Password"
35 
36 #define LANG_CODE_STR		"en_US.UTF-8"
37 #define SCHEDULE_POWER_ON	"Scheduled Power-On"
38 
39 #define COMMA_SEP		","
40 #define SEMICOLON_SEP		";"
41 
42 /* Sure Admin Functions */
43 
44 #define UTF_PREFIX		"<utf-16/>"
45 #define BEAM_PREFIX		"<BEAM/>"
46 
47 enum mechanism_values {
48 	PASSWORD		= 0x00,
49 	SIGNING_KEY		= 0x01,
50 	ENDORSEMENT_KEY		= 0x02,
51 };
52 
53 #define BIOS_ADMIN		"bios-admin"
54 #define POWER_ON		"power-on"
55 #define BIOS_SPM		"enhanced-bios-auth"
56 
57 #define PASSWD_MECHANISM_TYPES "password"
58 
59 #define HP_WMI_BIOS_GUID		"5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
60 
61 #define HP_WMI_BIOS_STRING_GUID		"988D08E3-68F4-4c35-AF3E-6A1B8106F83C"
62 #define HP_WMI_BIOS_INTEGER_GUID	"8232DE3D-663D-4327-A8F4-E293ADB9BF05"
63 #define HP_WMI_BIOS_ENUMERATION_GUID	"2D114B49-2DFB-4130-B8FE-4A3C09E75133"
64 #define HP_WMI_BIOS_ORDERED_LIST_GUID	"14EA9746-CE1F-4098-A0E0-7045CB4DA745"
65 #define HP_WMI_BIOS_PASSWORD_GUID	"322F2028-0F84-4901-988E-015176049E2D"
66 #define HP_WMI_SET_BIOS_SETTING_GUID	"1F4C91EB-DC5C-460b-951D-C7CB9B4B8D5E"
67 
68 enum hp_wmi_spm_commandtype {
69 	HPWMI_SECUREPLATFORM_GET_STATE  = 0x10,
70 	HPWMI_SECUREPLATFORM_SET_KEK	= 0x11,
71 	HPWMI_SECUREPLATFORM_SET_SK	= 0x12,
72 };
73 
74 enum hp_wmi_surestart_commandtype {
75 	HPWMI_SURESTART_GET_LOG_COUNT	= 0x01,
76 	HPWMI_SURESTART_GET_LOG		= 0x02,
77 };
78 
79 enum hp_wmi_command {
80 	HPWMI_READ		= 0x01,
81 	HPWMI_WRITE		= 0x02,
82 	HPWMI_ODM		= 0x03,
83 	HPWMI_SURESTART		= 0x20006,
84 	HPWMI_GM		= 0x20008,
85 	HPWMI_SECUREPLATFORM	= 0x20010,
86 };
87 
88 struct bios_return {
89 	u32 sigpass;
90 	u32 return_code;
91 };
92 
93 enum wmi_error_values {
94 	SUCCESS				= 0x00,
95 	CMD_FAILED			= 0x01,
96 	INVALID_SIGN			= 0x02,
97 	INVALID_CMD_VALUE		= 0x03,
98 	INVALID_CMD_TYPE		= 0x04,
99 	INVALID_DATA_SIZE		= 0x05,
100 	INVALID_CMD_PARAM		= 0x06,
101 	ENCRYP_CMD_REQUIRED		= 0x07,
102 	NO_SECURE_SESSION		= 0x08,
103 	SECURE_SESSION_FOUND		= 0x09,
104 	SECURE_SESSION_FAILED		= 0x0A,
105 	AUTH_FAILED			= 0x0B,
106 	INVALID_BIOS_AUTH		= 0x0E,
107 	NONCE_DID_NOT_MATCH		= 0x18,
108 	GENERIC_ERROR			= 0x1C,
109 	BIOS_ADMIN_POLICY_NOT_MET	= 0x28,
110 	BIOS_ADMIN_NOT_SET		= 0x38,
111 	P21_NO_PROVISIONED		= 0x1000,
112 	P21_PROVISION_IN_PROGRESS	= 0x1001,
113 	P21_IN_USE			= 0x1002,
114 	HEP_NOT_ACTIVE			= 0x1004,
115 	HEP_ALREADY_SET			= 0x1006,
116 	HEP_CHECK_STATE			= 0x1007,
117 };
118 
119 struct common_data {
120 	u8 display_name[MAX_BUFF_SIZE];
121 	u8 path[MAX_BUFF_SIZE];
122 	u32 is_readonly;
123 	u32 display_in_ui;
124 	u32 requires_physical_presence;
125 	u32 sequence;
126 	u32 prerequisites_size;
127 	u8 prerequisites[MAX_PREREQUISITES_SIZE][MAX_BUFF_SIZE];
128 	u32 security_level;
129 };
130 
131 struct string_data {
132 	struct common_data common;
133 	struct kobject *attr_name_kobj;
134 	u8 current_value[MAX_BUFF_SIZE];
135 	u8 new_value[MAX_BUFF_SIZE];
136 	u32 min_length;
137 	u32 max_length;
138 };
139 
140 struct integer_data {
141 	struct common_data common;
142 	struct kobject *attr_name_kobj;
143 	u32 current_value;
144 	u32 new_value;
145 	u32 lower_bound;
146 	u32 upper_bound;
147 	u32 scalar_increment;
148 };
149 
150 struct enumeration_data {
151 	struct common_data common;
152 	struct kobject *attr_name_kobj;
153 	u8 current_value[MAX_BUFF_SIZE];
154 	u8 new_value[MAX_BUFF_SIZE];
155 	u32 possible_values_size;
156 	u8 possible_values[MAX_VALUES_SIZE][MAX_BUFF_SIZE];
157 };
158 
159 struct ordered_list_data {
160 	struct common_data common;
161 	struct kobject *attr_name_kobj;
162 	u8 current_value[MAX_BUFF_SIZE];
163 	u8 new_value[MAX_BUFF_SIZE];
164 	u32 elements_size;
165 	u8 elements[MAX_ELEMENTS_SIZE][MAX_BUFF_SIZE];
166 };
167 
168 struct password_data {
169 	struct common_data common;
170 	struct kobject *attr_name_kobj;
171 	u8 current_password[MAX_PASSWD_SIZE];
172 	u8 new_password[MAX_PASSWD_SIZE];
173 	u32 min_password_length;
174 	u32 max_password_length;
175 	u32 encodings_size;
176 	u8 encodings[MAX_ENCODINGS_SIZE][MAX_BUFF_SIZE];
177 	bool is_enabled;
178 
179 	/*
180 	 * 'role' identifies the type of authentication.
181 	 * Two known types are bios-admin and power-on.
182 	 * 'bios-admin' represents BIOS administrator password
183 	 * 'power-on' represents a password required to use the system
184 	 */
185 	u32 role;
186 
187 	/*
188 	 * 'mechanism' represents the means of authentication.
189 	 * Only supported type currently is "password"
190 	 */
191 	u32 mechanism;
192 };
193 
194 struct secure_platform_data {
195 	struct kobject *attr_name_kobj;
196 	u8 attribute_name[MAX_BUFF_SIZE];
197 	u8 *endorsement_key;
198 	u8 *signing_key;
199 	u8 *auth_token;
200 	bool is_enabled;
201 	u32 mechanism;
202 };
203 
204 struct bioscfg_priv {
205 	struct kset *authentication_dir_kset;
206 	struct kset *main_dir_kset;
207 	struct device *class_dev;
208 	struct string_data *string_data;
209 	u32 string_instances_count;
210 	struct integer_data *integer_data;
211 	u32 integer_instances_count;
212 	struct enumeration_data *enumeration_data;
213 	u32 enumeration_instances_count;
214 	struct ordered_list_data *ordered_list_data;
215 	u32 ordered_list_instances_count;
216 	struct password_data *password_data;
217 	u32 password_instances_count;
218 
219 	struct kobject *sure_start_attr_kobj;
220 	struct secure_platform_data spm_data;
221 	u8 display_name_language_code[MAX_BUFF_SIZE];
222 	bool pending_reboot;
223 	struct mutex mutex;
224 };
225 
226 /* global structure used by multiple WMI interfaces */
227 extern struct bioscfg_priv bioscfg_drv;
228 
229 enum hp_wmi_data_type {
230 	HPWMI_STRING_TYPE,
231 	HPWMI_INTEGER_TYPE,
232 	HPWMI_ENUMERATION_TYPE,
233 	HPWMI_ORDERED_LIST_TYPE,
234 	HPWMI_PASSWORD_TYPE,
235 	HPWMI_SECURE_PLATFORM_TYPE,
236 	HPWMI_SURE_START_TYPE,
237 };
238 
239 enum hp_wmi_data_elements {
240 	/* Common elements */
241 	NAME = 0,
242 	VALUE = 1,
243 	PATH = 2,
244 	IS_READONLY = 3,
245 	DISPLAY_IN_UI = 4,
246 	REQUIRES_PHYSICAL_PRESENCE = 5,
247 	SEQUENCE = 6,
248 	PREREQUISITES_SIZE = 7,
249 	PREREQUISITES = 8,
250 	SECURITY_LEVEL = 9,
251 
252 	/* String elements */
253 	STR_MIN_LENGTH = 10,
254 	STR_MAX_LENGTH = 11,
255 	STR_ELEM_CNT = 12,
256 
257 	/* Integer elements */
258 	INT_LOWER_BOUND = 10,
259 	INT_UPPER_BOUND = 11,
260 	INT_SCALAR_INCREMENT = 12,
261 	INT_ELEM_CNT = 13,
262 
263 	/* Enumeration elements */
264 	ENUM_CURRENT_VALUE = 10,
265 	ENUM_SIZE = 11,
266 	ENUM_POSSIBLE_VALUES = 12,
267 	ENUM_ELEM_CNT = 13,
268 
269 	/* Ordered list elements */
270 	ORD_LIST_SIZE = 10,
271 	ORD_LIST_ELEMENTS = 11,
272 	ORD_ELEM_CNT = 12,
273 
274 	/* Password elements */
275 	PSWD_MIN_LENGTH = 10,
276 	PSWD_MAX_LENGTH = 11,
277 	PSWD_SIZE = 12,
278 	PSWD_ENCODINGS = 13,
279 	PSWD_IS_SET = 14,
280 	PSWD_ELEM_CNT = 15,
281 };
282 
283 #define GET_INSTANCE_ID(type)						\
284 	static int get_##type##_instance_id(struct kobject *kobj)	\
285 	{								\
286 		int i;							\
287 									\
288 		for (i = 0; i <= bioscfg_drv.type##_instances_count; i++) { \
289 			if (!strcmp(kobj->name, bioscfg_drv.type##_data[i].attr_name_kobj->name)) \
290 				return i;				\
291 		}							\
292 		return -EIO;						\
293 	}
294 
295 #define ATTRIBUTE_S_PROPERTY_SHOW(name, type)				\
296 	static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \
297 				   char *buf)				\
298 	{								\
299 		int i = get_##type##_instance_id(kobj);			\
300 		if (i >= 0)						\
301 			return sysfs_emit(buf, "%s\n", bioscfg_drv.type##_data[i].name); \
302 		return -EIO;						\
303 	}
304 
305 #define ATTRIBUTE_N_PROPERTY_SHOW(name, type)				\
306 	static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \
307 				   char *buf)				\
308 	{								\
309 		int i = get_##type##_instance_id(kobj);			\
310 		if (i >= 0)						\
311 			return sysfs_emit(buf, "%d\n", bioscfg_drv.type##_data[i].name); \
312 		return -EIO;						\
313 	}
314 
315 #define ATTRIBUTE_PROPERTY_STORE(curr_val, type)			\
316 	static ssize_t curr_val##_store(struct kobject *kobj,		\
317 					struct kobj_attribute *attr,	\
318 					const char *buf, size_t count)	\
319 	{								\
320 		char *attr_value = NULL;				\
321 		int i;							\
322 		int ret = -EIO;						\
323 									\
324 		attr_value = kstrdup(buf, GFP_KERNEL);			\
325 		if (!attr_value)					\
326 			return -ENOMEM;					\
327 									\
328 		ret = hp_enforce_single_line_input(attr_value, count);	\
329 		if (!ret) {						\
330 			i = get_##type##_instance_id(kobj);		\
331 			if (i >= 0)					\
332 				ret = validate_##type##_input(i, attr_value); \
333 		}							\
334 		if (!ret)						\
335 			ret = hp_set_attribute(kobj->name, attr_value);	\
336 		if (!ret) {						\
337 			update_##type##_value(i, attr_value);		\
338 			if (bioscfg_drv.type##_data[i].common.requires_physical_presence)	\
339 				hp_set_reboot_and_signal_event();	\
340 		}							\
341 		hp_clear_all_credentials();				\
342 		kfree(attr_value);					\
343 									\
344 		return ret ? ret : count;				\
345 	}
346 
347 #define ATTRIBUTE_SPM_N_PROPERTY_SHOW(name, type)			\
348 	static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) \
349 	{								\
350 		return sysfs_emit(buf, "%d\n", bioscfg_drv.type##_data.name); \
351 	}
352 
353 #define ATTRIBUTE_SPM_S_PROPERTY_SHOW(name, type)			\
354 	static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) \
355 	{								\
356 		return sysfs_emit(buf, "%s\n", bioscfg_drv.type##_data.name); \
357 	}
358 
359 #define ATTRIBUTE_VALUES_PROPERTY_SHOW(name, type, sep)			\
360 	static ssize_t name##_show(struct kobject *kobj,		\
361 				   struct kobj_attribute *attr, char *buf) \
362 	{								\
363 		int i;							\
364 		int len = 0;						\
365 		int instance_id = get_##type##_instance_id(kobj);	\
366 									\
367 		if (instance_id < 0)					\
368 			return 0;					\
369 									\
370 		for (i = 0; i < bioscfg_drv.type##_data[instance_id].name##_size; i++) { \
371 			if (i)						\
372 				len += sysfs_emit_at(buf, len, "%s", sep); \
373 									\
374 			len += sysfs_emit_at(buf, len, "%s",		\
375 					     bioscfg_drv.type##_data[instance_id].name[i]); \
376 		}							\
377 		len += sysfs_emit_at(buf, len, "\n");			\
378 		return len;						\
379 	}
380 
381 #define ATTRIBUTE_S_COMMON_PROPERTY_SHOW(name, type)		\
382 	static ssize_t name##_show(struct kobject *kobj, struct kobj_attribute *attr, \
383 				   char *buf)				\
384 	{								\
385 		int i = get_##type##_instance_id(kobj);			\
386 		if (i >= 0)						\
387 			return sysfs_emit(buf, "%s\n", bioscfg_drv.type##_data[i].common.name); \
388 		return -EIO;						\
389 	}
390 
391 extern struct kobj_attribute common_display_langcode;
392 
393 /* Prototypes */
394 
395 /* String attributes */
396 int hp_populate_string_buffer_data(u8 *buffer_ptr, u32 *buffer_size,
397 				   int instance_id,
398 				   struct kobject *attr_name_kobj);
399 int hp_alloc_string_data(void);
400 void hp_exit_string_attributes(void);
401 int hp_populate_string_package_data(union acpi_object *str_obj,
402 				    int instance_id,
403 				    struct kobject *attr_name_kobj);
404 
405 /* Integer attributes */
406 int hp_populate_integer_buffer_data(u8 *buffer_ptr, u32 *buffer_size,
407 				    int instance_id,
408 				    struct kobject *attr_name_kobj);
409 int hp_alloc_integer_data(void);
410 void hp_exit_integer_attributes(void);
411 int hp_populate_integer_package_data(union acpi_object *integer_obj,
412 				     int instance_id,
413 				     struct kobject *attr_name_kobj);
414 
415 /* Enumeration attributes */
416 int hp_populate_enumeration_buffer_data(u8 *buffer_ptr, u32 *buffer_size,
417 					int instance_id,
418 					struct kobject *attr_name_kobj);
419 int hp_alloc_enumeration_data(void);
420 void hp_exit_enumeration_attributes(void);
421 int hp_populate_enumeration_package_data(union acpi_object *enum_obj,
422 					 int instance_id,
423 					 struct kobject *attr_name_kobj);
424 
425 /* Ordered list */
426 int hp_populate_ordered_list_buffer_data(u8 *buffer_ptr,
427 					 u32 *buffer_size,
428 					 int instance_id,
429 					 struct kobject *attr_name_kobj);
430 int hp_alloc_ordered_list_data(void);
431 void hp_exit_ordered_list_attributes(void);
432 int hp_populate_ordered_list_package_data(union acpi_object *order_obj,
433 					  int instance_id,
434 					  struct kobject *attr_name_kobj);
435 
436 /* Password authentication attributes */
437 int hp_populate_password_buffer_data(u8 *buffer_ptr, u32 *buffer_size,
438 				     int instance_id,
439 				     struct kobject *attr_name_kobj);
440 int hp_populate_password_package_data(union acpi_object *password_obj,
441 				      int instance_id,
442 				      struct kobject *attr_name_kobj);
443 int hp_alloc_password_data(void);
444 int hp_get_password_instance_for_type(const char *name);
445 int hp_clear_all_credentials(void);
446 int hp_set_attribute(const char *a_name, const char *a_value);
447 
448 /* SPM attributes */
449 void hp_exit_password_attributes(void);
450 void hp_exit_secure_platform_attributes(void);
451 int hp_populate_secure_platform_data(struct kobject *attr_name_kobj);
452 int hp_populate_security_buffer(u16 *buffer, const char *authentication);
453 
454 /* Bios Attributes interface */
455 int hp_wmi_set_bios_setting(u16 *input_buffer, u32 input_size);
456 int hp_wmi_perform_query(int query, enum hp_wmi_command command,
457 			 void *buffer, u32 insize, u32 outsize);
458 
459 /* Sure Start attributes */
460 void hp_exit_sure_start_attributes(void);
461 int hp_populate_sure_start_data(struct kobject *attr_name_kobj);
462 
463 /* Bioscfg */
464 
465 void hp_exit_attr_set_interface(void);
466 int hp_init_attr_set_interface(void);
467 size_t hp_calculate_string_buffer(const char *str);
468 size_t hp_calculate_security_buffer(const char *authentication);
469 void *hp_ascii_to_utf16_unicode(u16 *p, const u8 *str);
470 int hp_get_integer_from_buffer(u8 **buffer, u32 *buffer_size, u32 *integer);
471 int hp_get_string_from_buffer(u8 **buffer, u32 *buffer_size, char *dst, u32 dst_size);
472 int hp_convert_hexstr_to_str(const char *input, u32 input_len, char **str, int *len);
473 int hp_encode_outsize_for_pvsz(int outsize);
474 int hp_enforce_single_line_input(char *buf, size_t count);
475 void hp_set_reboot_and_signal_event(void);
476 ssize_t display_name_language_code_show(struct kobject *kobj,
477 					struct kobj_attribute *attr,
478 					char *buf);
479 union acpi_object *hp_get_wmiobj_pointer(int instance_id, const char *guid_string);
480 int hp_get_instance_count(const char *guid_string);
481 void hp_update_attribute_permissions(bool isreadonly, struct kobj_attribute *current_val);
482 void hp_friendly_user_name_update(char *path, const char *attr_name,
483 				  char *attr_display, int attr_size);
484 int hp_wmi_error_and_message(int error_code);
485 int hp_get_common_data_from_buffer(u8 **buffer_ptr, u32 *buffer_size, struct common_data *common);
486 
487 #endif
488