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efi: Handle deletions and size changes in efivarfs_write_file
[linux-block.git] / include / linux / efi.h
CommitLineData
1da177e4
LT		 1#ifndef _LINUX_EFI_H
2#define _LINUX_EFI_H
3
4/*
5 * Extensible Firmware Interface
6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
7 *
8 * Copyright (C) 1999 VA Linux Systems
9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
11 * David Mosberger-Tang <davidm@hpl.hp.com>
12 * Stephane Eranian <eranian@hpl.hp.com>
13 */
14#include <linux/init.h>
15#include <linux/string.h>
16#include <linux/time.h>
17#include <linux/types.h>
18#include <linux/proc_fs.h>
19#include <linux/rtc.h>
20#include <linux/ioport.h>
4a3575fd 21#include <linux/pfn.h>
5ee9c198 22#include <linux/pstore.h>
1da177e4
LT		 23
24#include <asm/page.h>
1da177e4
LT		 25
26#define EFI_SUCCESS 0
27#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
28#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
29#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
30#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
31#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
5d9db883
MG		 32#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))
33#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))
34#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))
35#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))
1da177e4 36#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
5d9db883 37#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
1da177e4
LT		 38
39typedef unsigned long efi_status_t;
40typedef u8 efi_bool_t;
41typedef u16 efi_char16_t; /* UNICODE character */
42
43
44typedef struct {
45 u8 b[16];
46} efi_guid_t;
47
48#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
49((efi_guid_t) \
50{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
51 (b) & 0xff, ((b) >> 8) & 0xff, \
52 (c) & 0xff, ((c) >> 8) & 0xff, \
53 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
54
55/*
56 * Generic EFI table header
57 */
58typedef struct {
59 u64 signature;
60 u32 revision;
61 u32 headersize;
62 u32 crc32;
63 u32 reserved;
64} efi_table_hdr_t;
65
66/*
67 * Memory map descriptor:
68 */
69
70/* Memory types: */
71#define EFI_RESERVED_TYPE 0
72#define EFI_LOADER_CODE 1
73#define EFI_LOADER_DATA 2
74#define EFI_BOOT_SERVICES_CODE 3
75#define EFI_BOOT_SERVICES_DATA 4
76#define EFI_RUNTIME_SERVICES_CODE 5
77#define EFI_RUNTIME_SERVICES_DATA 6
78#define EFI_CONVENTIONAL_MEMORY 7
79#define EFI_UNUSABLE_MEMORY 8
80#define EFI_ACPI_RECLAIM_MEMORY 9
81#define EFI_ACPI_MEMORY_NVS 10
82#define EFI_MEMORY_MAPPED_IO 11
83#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
84#define EFI_PAL_CODE 13
85#define EFI_MAX_MEMORY_TYPE 14
86
87/* Attribute values: */
88#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
89#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
90#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
91#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
92#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
93#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
94#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
95#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
96#define EFI_MEMORY_DESCRIPTOR_VERSION 1
97
98#define EFI_PAGE_SHIFT 12
99
1da177e4
LT		 100typedef struct {
101 u32 type;
102 u32 pad;
103 u64 phys_addr;
104 u64 virt_addr;
105 u64 num_pages;
106 u64 attribute;
1da177e4
LT		 107} efi_memory_desc_t;
108
3b370237
MG		 109typedef struct {
110 efi_guid_t guid;
111 u32 headersize;
112 u32 flags;
113 u32 imagesize;
114} efi_capsule_header_t;
115
bb05e4ba
MF		 116/*
117 * Allocation types for calls to boottime->allocate_pages.
118 */
119#define EFI_ALLOCATE_ANY_PAGES 0
120#define EFI_ALLOCATE_MAX_ADDRESS 1
121#define EFI_ALLOCATE_ADDRESS 2
122#define EFI_MAX_ALLOCATE_TYPE 3
123
e088a4ad 124typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
1da177e4
LT		 125
126/*
127 * Types and defines for Time Services
128 */
129#define EFI_TIME_ADJUST_DAYLIGHT 0x1
130#define EFI_TIME_IN_DAYLIGHT 0x2
131#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
132
133typedef struct {
134 u16 year;
135 u8 month;
136 u8 day;
137 u8 hour;
138 u8 minute;
139 u8 second;
140 u8 pad1;
141 u32 nanosecond;
142 s16 timezone;
143 u8 daylight;
144 u8 pad2;
145} efi_time_t;
146
147typedef struct {
148 u32 resolution;
149 u32 accuracy;
150 u8 sets_to_zero;
151} efi_time_cap_t;
152
f30ca6ba
MF		 153/*
154 * EFI Boot Services table
155 */
156typedef struct {
157 efi_table_hdr_t hdr;
158 void *raise_tpl;
159 void *restore_tpl;
160 void *allocate_pages;
161 void *free_pages;
162 void *get_memory_map;
163 void *allocate_pool;
164 void *free_pool;
165 void *create_event;
166 void *set_timer;
167 void *wait_for_event;
168 void *signal_event;
169 void *close_event;
170 void *check_event;
171 void *install_protocol_interface;
172 void *reinstall_protocol_interface;
173 void *uninstall_protocol_interface;
174 void *handle_protocol;
175 void *__reserved;
176 void *register_protocol_notify;
177 void *locate_handle;
178 void *locate_device_path;
179 void *install_configuration_table;
180 void *load_image;
181 void *start_image;
182 void *exit;
183 void *unload_image;
184 void *exit_boot_services;
185 void *get_next_monotonic_count;
186 void *stall;
187 void *set_watchdog_timer;
188 void *connect_controller;
189 void *disconnect_controller;
190 void *open_protocol;
191 void *close_protocol;
192 void *open_protocol_information;
193 void *protocols_per_handle;
194 void *locate_handle_buffer;
195 void *locate_protocol;
196 void *install_multiple_protocol_interfaces;
197 void *uninstall_multiple_protocol_interfaces;
198 void *calculate_crc32;
199 void *copy_mem;
200 void *set_mem;
201 void *create_event_ex;
202} efi_boot_services_t;
203
1da177e4
LT		 204/*
205 * Types and defines for EFI ResetSystem
206 */
207#define EFI_RESET_COLD 0
208#define EFI_RESET_WARM 1
209#define EFI_RESET_SHUTDOWN 2
210
211/*
212 * EFI Runtime Services table
213 */
214#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
215#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
216
217typedef struct {
218 efi_table_hdr_t hdr;
219 unsigned long get_time;
220 unsigned long set_time;
221 unsigned long get_wakeup_time;
222 unsigned long set_wakeup_time;
223 unsigned long set_virtual_address_map;
224 unsigned long convert_pointer;
225 unsigned long get_variable;
226 unsigned long get_next_variable;
227 unsigned long set_variable;
228 unsigned long get_next_high_mono_count;
229 unsigned long reset_system;
3b370237
MG		 230 unsigned long update_capsule;
231 unsigned long query_capsule_caps;
232 unsigned long query_variable_info;
1da177e4
LT		 233} efi_runtime_services_t;
234
235typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
236typedef efi_status_t efi_set_time_t (efi_time_t *tm);
237typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
238 efi_time_t *tm);
239typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
240typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
241 unsigned long *data_size, void *data);
242typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
243 efi_guid_t *vendor);
244typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
f7a2d73f 245 u32 attr, unsigned long data_size,
1da177e4
LT		 246 void *data);
247typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
248typedef void efi_reset_system_t (int reset_type, efi_status_t status,
249 unsigned long data_size, efi_char16_t *data);
250typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
251 unsigned long descriptor_size,
252 u32 descriptor_version,
253 efi_memory_desc_t *virtual_map);
3b370237
MG		 254typedef efi_status_t efi_query_variable_info_t(u32 attr,
255 u64 *storage_space,
256 u64 *remaining_space,
257 u64 *max_variable_size);
258typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
259 unsigned long count,
260 unsigned long sg_list);
261typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
262 unsigned long count,
263 u64 *max_size,
264 int *reset_type);
1da177e4
LT		 265
266/*
267 * EFI Configuration Table and GUID definitions
268 */
269#define NULL_GUID \
270 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
271
272#define MPS_TABLE_GUID \
273 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
274
275#define ACPI_TABLE_GUID \
276 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
277
278#define ACPI_20_TABLE_GUID \
279 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
280
281#define SMBIOS_TABLE_GUID \
282 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
283
284#define SAL_SYSTEM_TABLE_GUID \
285 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
286
287#define HCDP_TABLE_GUID \
288 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
289
290#define UGA_IO_PROTOCOL_GUID \
291 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
292
293#define EFI_GLOBAL_VARIABLE_GUID \
294 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
295
a50f70b1
RA		 296#define UV_SYSTEM_TABLE_GUID \
297 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
298
5ee9c198
MG		 299#define LINUX_EFI_CRASH_GUID \
300 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
301
8e84f345
MF		 302#define LOADED_IMAGE_PROTOCOL_GUID \
303 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
304
0f7c5d47
MF		 305#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
306 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
307
308#define EFI_UGA_PROTOCOL_GUID \
309 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
310
311#define EFI_PCI_IO_PROTOCOL_GUID \
312 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
313
55839d51
MF		 314#define EFI_FILE_INFO_ID \
315 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
316
317#define EFI_FILE_SYSTEM_GUID \
318 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
319
1adbfa35
OJ		 320typedef struct {
321 efi_guid_t guid;
322 u64 table;
323} efi_config_table_64_t;
324
325typedef struct {
326 efi_guid_t guid;
327 u32 table;
328} efi_config_table_32_t;
329
1da177e4
LT		 330typedef struct {
331 efi_guid_t guid;
332 unsigned long table;
333} efi_config_table_t;
334
335#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
1da177e4 336
3b370237
MG		 337#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
338#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
339#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
340#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
341#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
342#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
343
1adbfa35
OJ		 344typedef struct {
345 efi_table_hdr_t hdr;
346 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
347 u32 fw_revision;
348 u32 __pad1;
349 u64 con_in_handle;
350 u64 con_in;
351 u64 con_out_handle;
352 u64 con_out;
353 u64 stderr_handle;
354 u64 stderr;
355 u64 runtime;
356 u64 boottime;
357 u32 nr_tables;
358 u32 __pad2;
359 u64 tables;
360} efi_system_table_64_t;
361
362typedef struct {
363 efi_table_hdr_t hdr;
364 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
365 u32 fw_revision;
366 u32 con_in_handle;
367 u32 con_in;
368 u32 con_out_handle;
369 u32 con_out;
370 u32 stderr_handle;
371 u32 stderr;
372 u32 runtime;
373 u32 boottime;
374 u32 nr_tables;
375 u32 tables;
376} efi_system_table_32_t;
377
1da177e4
LT		 378typedef struct {
379 efi_table_hdr_t hdr;
380 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
381 u32 fw_revision;
382 unsigned long con_in_handle;
383 unsigned long con_in;
384 unsigned long con_out_handle;
385 unsigned long con_out;
386 unsigned long stderr_handle;
387 unsigned long stderr;
388 efi_runtime_services_t *runtime;
f30ca6ba 389 efi_boot_services_t *boottime;
1da177e4
LT		 390 unsigned long nr_tables;
391 unsigned long tables;
392} efi_system_table_t;
393
394struct efi_memory_map {
7ae65fd3
MT		 395 void *phys_map;
396 void *map;
397 void *map_end;
1da177e4
LT		 398 int nr_map;
399 unsigned long desc_version;
7ae65fd3 400 unsigned long desc_size;
1da177e4
LT		 401};
402
8e84f345
MF		 403typedef struct {
404 u32 revision;
405 void *parent_handle;
406 efi_system_table_t *system_table;
407 void *device_handle;
408 void *file_path;
409 void *reserved;
410 u32 load_options_size;
411 void *load_options;
412 void *image_base;
413 __aligned_u64 image_size;
414 unsigned int image_code_type;
415 unsigned int image_data_type;
416 unsigned long unload;
417} efi_loaded_image_t;
418
55839d51
MF		 419typedef struct {
420 u64 revision;
421 void *open_volume;
422} efi_file_io_interface_t;
423
424typedef struct {
425 u64 size;
426 u64 file_size;
427 u64 phys_size;
428 efi_time_t create_time;
429 efi_time_t last_access_time;
430 efi_time_t modification_time;
431 __aligned_u64 attribute;
432 efi_char16_t filename[1];
433} efi_file_info_t;
434
435typedef struct {
436 u64 revision;
437 void *open;
438 void *close;
439 void *delete;
440 void *read;
441 void *write;
442 void *get_position;
443 void *set_position;
444 void *get_info;
445 void *set_info;
446 void *flush;
447} efi_file_handle_t;
448
449#define EFI_FILE_MODE_READ 0x0000000000000001
450#define EFI_FILE_MODE_WRITE 0x0000000000000002
451#define EFI_FILE_MODE_CREATE 0x8000000000000000
452
b2c99e3c
BH		 453#define EFI_INVALID_TABLE_ADDR (~0UL)
454
1da177e4
LT		 455/*
456 * All runtime access to EFI goes through this structure:
457 */
458extern struct efi {
459 efi_system_table_t *systab; /* EFI system table */
3b370237 460 unsigned int runtime_version; /* Runtime services version */
b2c99e3c
BH		 461 unsigned long mps; /* MPS table */
462 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
463 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
464 unsigned long smbios; /* SM BIOS table */
465 unsigned long sal_systab; /* SAL system table */
466 unsigned long boot_info; /* boot info table */
467 unsigned long hcdp; /* HCDP table */
468 unsigned long uga; /* UGA table */
a50f70b1 469 unsigned long uv_systab; /* UV system table */
1da177e4
LT		 470 efi_get_time_t *get_time;
471 efi_set_time_t *set_time;
472 efi_get_wakeup_time_t *get_wakeup_time;
473 efi_set_wakeup_time_t *set_wakeup_time;
474 efi_get_variable_t *get_variable;
475 efi_get_next_variable_t *get_next_variable;
476 efi_set_variable_t *set_variable;
3b370237
MG		 477 efi_query_variable_info_t *query_variable_info;
478 efi_update_capsule_t *update_capsule;
479 efi_query_capsule_caps_t *query_capsule_caps;
1da177e4
LT		 480 efi_get_next_high_mono_count_t *get_next_high_mono_count;
481 efi_reset_system_t *reset_system;
482 efi_set_virtual_address_map_t *set_virtual_address_map;
483} efi;
484
485static inline int
486efi_guidcmp (efi_guid_t left, efi_guid_t right)
487{
488 return memcmp(&left, &right, sizeof (efi_guid_t));
489}
490
491static inline char *
492efi_guid_unparse(efi_guid_t *guid, char *out)
493{
925ede0b 494 sprintf(out, "%pUl", guid->b);
1da177e4
LT		 495 return out;
496}
497
498extern void efi_init (void);
499extern void *efi_get_pal_addr (void);
500extern void efi_map_pal_code (void);
1da177e4
LT		 501extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
502extern void efi_gettimeofday (struct timespec *ts);
503extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
78510792 504#ifdef CONFIG_X86
2223af38 505extern void efi_late_init(void);
78510792
JT		 506extern void efi_free_boot_services(void);
507#else
2223af38 508static inline void efi_late_init(void) {}
78510792
JT		 509static inline void efi_free_boot_services(void) {}
510#endif
7bc90e01 511extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
1da177e4
LT		 512extern u64 efi_get_iobase (void);
513extern u32 efi_mem_type (unsigned long phys_addr);
514extern u64 efi_mem_attributes (unsigned long phys_addr);
32e62c63 515extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1da177e4
LT		 516extern int __init efi_uart_console_only (void);
517extern void efi_initialize_iomem_resources(struct resource *code_resource,
00bf4098 518 struct resource *data_resource, struct resource *bss_resource);
f026cfa8
PA		 519extern unsigned long efi_get_time(void);
520extern int efi_set_rtc_mmss(unsigned long nowtime);
916f676f 521extern void efi_reserve_boot_services(void);
1da177e4
LT		 522extern struct efi_memory_map memmap;
523
524/**
525 * efi_range_is_wc - check the WC bit on an address range
526 * @start: starting kvirt address
527 * @len: length of range
528 *
529 * Consult the EFI memory map and make sure it's ok to set this range WC.
530 * Returns true or false.
531 */
532static inline int efi_range_is_wc(unsigned long start, unsigned long len)
533{
986a80d5 534 unsigned long i;
1da177e4
LT		 535
536 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
537 unsigned long paddr = __pa(start + i);
538 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
539 return 0;
540 }
541 /* The range checked out */
542 return 1;
543}
544
545#ifdef CONFIG_EFI_PCDP
546extern int __init efi_setup_pcdp_console(char *);
547#endif
548
549/*
550 * We play games with efi_enabled so that the compiler will, if possible, remove
551 * EFI-related code altogether.
552 */
553#ifdef CONFIG_EFI
554# ifdef CONFIG_X86
555 extern int efi_enabled;
1adbfa35 556 extern bool efi_64bit;
1da177e4
LT		 557# else
558# define efi_enabled 1
559# endif
560#else
561# define efi_enabled 0
562#endif
563
564/*
565 * Variable Attributes
566 */
567#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
568#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
569#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
41b3254c
MG		 570#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
571#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
572#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
573#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
574
575#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
576 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
577 EFI_VARIABLE_RUNTIME_ACCESS | \
578 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
579 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
580 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
581 EFI_VARIABLE_APPEND_WRITE)
e2527a7c
MF		 582/*
583 * The type of search to perform when calling boottime->locate_handle
584 */
585#define EFI_LOCATE_ALL_HANDLES 0
586#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
587#define EFI_LOCATE_BY_PROTOCOL 2
588
1da177e4
LT		 589/*
590 * EFI Device Path information
591 */
592#define EFI_DEV_HW 0x01
593#define EFI_DEV_PCI 1
594#define EFI_DEV_PCCARD 2
595#define EFI_DEV_MEM_MAPPED 3
596#define EFI_DEV_VENDOR 4
597#define EFI_DEV_CONTROLLER 5
598#define EFI_DEV_ACPI 0x02
599#define EFI_DEV_BASIC_ACPI 1
600#define EFI_DEV_EXPANDED_ACPI 2
601#define EFI_DEV_MSG 0x03
602#define EFI_DEV_MSG_ATAPI 1
603#define EFI_DEV_MSG_SCSI 2
604#define EFI_DEV_MSG_FC 3
605#define EFI_DEV_MSG_1394 4
606#define EFI_DEV_MSG_USB 5
607#define EFI_DEV_MSG_USB_CLASS 15
608#define EFI_DEV_MSG_I20 6
609#define EFI_DEV_MSG_MAC 11
610#define EFI_DEV_MSG_IPV4 12
611#define EFI_DEV_MSG_IPV6 13
612#define EFI_DEV_MSG_INFINIBAND 9
613#define EFI_DEV_MSG_UART 14
614#define EFI_DEV_MSG_VENDOR 10
615#define EFI_DEV_MEDIA 0x04
616#define EFI_DEV_MEDIA_HARD_DRIVE 1
617#define EFI_DEV_MEDIA_CDROM 2
618#define EFI_DEV_MEDIA_VENDOR 3
619#define EFI_DEV_MEDIA_FILE 4
620#define EFI_DEV_MEDIA_PROTOCOL 5
621#define EFI_DEV_BIOS_BOOT 0x05
622#define EFI_DEV_END_PATH 0x7F
623#define EFI_DEV_END_PATH2 0xFF
624#define EFI_DEV_END_INSTANCE 0x01
625#define EFI_DEV_END_ENTIRE 0xFF
626
627struct efi_generic_dev_path {
628 u8 type;
629 u8 sub_type;
630 u16 length;
631} __attribute ((packed));
632
4a3575fd
HY		 633static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
634{
635 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
636 *addr &= PAGE_MASK;
637}
638
4fc756bd
MW		 639#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
640/*
641 * EFI Variable support.
642 *
643 * Different firmware drivers can expose their EFI-like variables using
644 * the following.
645 */
646
647struct efivar_operations {
648 efi_get_variable_t *get_variable;
649 efi_get_next_variable_t *get_next_variable;
650 efi_set_variable_t *set_variable;
651};
652
653struct efivars {
654 /*
655 * ->lock protects two things:
656 * 1) ->list - adds, removals, reads, writes
657 * 2) ops.[gs]et_variable() calls.
658 * It must not be held when creating sysfs entries or calling kmalloc.
659 * ops.get_next_variable() is only called from register_efivars(),
660 * which is protected by the BKL, so that path is safe.
661 */
662 spinlock_t lock;
663 struct list_head list;
664 struct kset *kset;
665 struct bin_attribute *new_var, *del_var;
666 const struct efivar_operations *ops;
5ee9c198
MG		 667 struct efivar_entry *walk_entry;
668 struct pstore_info efi_pstore_info;
4fc756bd
MW		 669};
670
671int register_efivars(struct efivars *efivars,
672 const struct efivar_operations *ops,
673 struct kobject *parent_kobj);
674void unregister_efivars(struct efivars *efivars);
675
676#endif /* CONFIG_EFI_VARS */
677
1da177e4 678#endif /* _LINUX_EFI_H */
Linux 6.x block layer and io_uring tree(s)