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bee91169 AG |
1 | /* |
2 | * EFI application boot time services | |
3 | * | |
4 | * Copyright (c) 2016 Alexander Graf | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
bee91169 | 9 | #include <common.h> |
7d963323 | 10 | #include <div64.h> |
bee91169 | 11 | #include <efi_loader.h> |
ad644e7c | 12 | #include <environment.h> |
bee91169 AG |
13 | #include <malloc.h> |
14 | #include <asm/global_data.h> | |
15 | #include <libfdt_env.h> | |
16 | #include <u-boot/crc.h> | |
17 | #include <bootm.h> | |
18 | #include <inttypes.h> | |
19 | #include <watchdog.h> | |
20 | ||
21 | DECLARE_GLOBAL_DATA_PTR; | |
22 | ||
32f4b2f8 | 23 | /* Task priority level */ |
152cade3 | 24 | static efi_uintn_t efi_tpl = TPL_APPLICATION; |
32f4b2f8 | 25 | |
bee91169 AG |
26 | /* This list contains all the EFI objects our payload has access to */ |
27 | LIST_HEAD(efi_obj_list); | |
28 | ||
29 | /* | |
30 | * If we're running on nasty systems (32bit ARM booting into non-EFI Linux) | |
31 | * we need to do trickery with caches. Since we don't want to break the EFI | |
32 | * aware boot path, only apply hacks when loading exiting directly (breaking | |
33 | * direct Linux EFI booting along the way - oh well). | |
34 | */ | |
35 | static bool efi_is_direct_boot = true; | |
36 | ||
37 | /* | |
38 | * EFI can pass arbitrary additional "tables" containing vendor specific | |
39 | * information to the payload. One such table is the FDT table which contains | |
40 | * a pointer to a flattened device tree blob. | |
41 | * | |
42 | * In most cases we want to pass an FDT to the payload, so reserve one slot of | |
43 | * config table space for it. The pointer gets populated by do_bootefi_exec(). | |
44 | */ | |
3c63db9c | 45 | static struct efi_configuration_table __efi_runtime_data efi_conf_table[2]; |
bee91169 | 46 | |
65e4c0b1 | 47 | #ifdef CONFIG_ARM |
bee91169 AG |
48 | /* |
49 | * The "gd" pointer lives in a register on ARM and AArch64 that we declare | |
50 | * fixed when compiling U-Boot. However, the payload does not know about that | |
51 | * restriction so we need to manually swap its and our view of that register on | |
52 | * EFI callback entry/exit. | |
53 | */ | |
54 | static volatile void *efi_gd, *app_gd; | |
65e4c0b1 | 55 | #endif |
bee91169 | 56 | |
c160d2f5 | 57 | static int entry_count; |
af65db85 | 58 | static int nesting_level; |
f0959dbe HS |
59 | /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */ |
60 | const efi_guid_t efi_guid_driver_binding_protocol = | |
61 | EFI_DRIVER_BINDING_PROTOCOL_GUID; | |
c160d2f5 | 62 | |
2074f700 HS |
63 | static efi_status_t EFIAPI efi_disconnect_controller( |
64 | efi_handle_t controller_handle, | |
65 | efi_handle_t driver_image_handle, | |
66 | efi_handle_t child_handle); | |
3f9b0042 | 67 | |
c160d2f5 RC |
68 | /* Called on every callback entry */ |
69 | int __efi_entry_check(void) | |
70 | { | |
71 | int ret = entry_count++ == 0; | |
72 | #ifdef CONFIG_ARM | |
73 | assert(efi_gd); | |
74 | app_gd = gd; | |
75 | gd = efi_gd; | |
76 | #endif | |
77 | return ret; | |
78 | } | |
79 | ||
80 | /* Called on every callback exit */ | |
81 | int __efi_exit_check(void) | |
82 | { | |
83 | int ret = --entry_count == 0; | |
84 | #ifdef CONFIG_ARM | |
85 | gd = app_gd; | |
86 | #endif | |
87 | return ret; | |
88 | } | |
89 | ||
bee91169 AG |
90 | /* Called from do_bootefi_exec() */ |
91 | void efi_save_gd(void) | |
92 | { | |
65e4c0b1 | 93 | #ifdef CONFIG_ARM |
bee91169 | 94 | efi_gd = gd; |
65e4c0b1 | 95 | #endif |
bee91169 AG |
96 | } |
97 | ||
c160d2f5 RC |
98 | /* |
99 | * Special case handler for error/abort that just forces things back | |
100 | * to u-boot world so we can dump out an abort msg, without any care | |
101 | * about returning back to UEFI world. | |
102 | */ | |
bee91169 AG |
103 | void efi_restore_gd(void) |
104 | { | |
65e4c0b1 | 105 | #ifdef CONFIG_ARM |
bee91169 AG |
106 | /* Only restore if we're already in EFI context */ |
107 | if (!efi_gd) | |
108 | return; | |
bee91169 | 109 | gd = efi_gd; |
65e4c0b1 | 110 | #endif |
bee91169 AG |
111 | } |
112 | ||
af65db85 RC |
113 | /* |
114 | * Two spaces per indent level, maxing out at 10.. which ought to be | |
115 | * enough for anyone ;-) | |
116 | */ | |
117 | static const char *indent_string(int level) | |
118 | { | |
119 | const char *indent = " "; | |
120 | const int max = strlen(indent); | |
121 | level = min(max, level * 2); | |
122 | return &indent[max - level]; | |
123 | } | |
124 | ||
ae0bd3a9 HS |
125 | const char *__efi_nesting(void) |
126 | { | |
127 | return indent_string(nesting_level); | |
128 | } | |
129 | ||
af65db85 RC |
130 | const char *__efi_nesting_inc(void) |
131 | { | |
132 | return indent_string(nesting_level++); | |
133 | } | |
134 | ||
135 | const char *__efi_nesting_dec(void) | |
136 | { | |
137 | return indent_string(--nesting_level); | |
138 | } | |
139 | ||
332468f7 HS |
140 | /* |
141 | * Queue an EFI event. | |
142 | * | |
143 | * This function queues the notification function of the event for future | |
144 | * execution. | |
145 | * | |
146 | * The notification function is called if the task priority level of the | |
147 | * event is higher than the current task priority level. | |
148 | * | |
149 | * For the SignalEvent service see efi_signal_event_ext. | |
150 | * | |
151 | * @event event to signal | |
9bc9664d | 152 | * @check_tpl check the TPL level |
332468f7 | 153 | */ |
9bc9664d | 154 | void efi_signal_event(struct efi_event *event, bool check_tpl) |
c6841592 | 155 | { |
ca62a4f5 | 156 | if (event->notify_function) { |
e190e897 | 157 | event->is_queued = true; |
32f4b2f8 | 158 | /* Check TPL */ |
9bc9664d | 159 | if (check_tpl && efi_tpl >= event->notify_tpl) |
32f4b2f8 | 160 | return; |
ea630ce9 HS |
161 | EFI_CALL_VOID(event->notify_function(event, |
162 | event->notify_context)); | |
c6841592 | 163 | } |
e190e897 | 164 | event->is_queued = false; |
c6841592 | 165 | } |
166 | ||
332468f7 HS |
167 | /* |
168 | * Raise the task priority level. | |
169 | * | |
170 | * This function implements the RaiseTpl service. | |
171 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
172 | * for details. | |
173 | * | |
174 | * @new_tpl new value of the task priority level | |
175 | * @return old value of the task priority level | |
176 | */ | |
152cade3 | 177 | static unsigned long EFIAPI efi_raise_tpl(efi_uintn_t new_tpl) |
bee91169 | 178 | { |
152cade3 | 179 | efi_uintn_t old_tpl = efi_tpl; |
32f4b2f8 | 180 | |
503f2695 | 181 | EFI_ENTRY("0x%zx", new_tpl); |
32f4b2f8 HS |
182 | |
183 | if (new_tpl < efi_tpl) | |
184 | debug("WARNING: new_tpl < current_tpl in %s\n", __func__); | |
185 | efi_tpl = new_tpl; | |
186 | if (efi_tpl > TPL_HIGH_LEVEL) | |
187 | efi_tpl = TPL_HIGH_LEVEL; | |
188 | ||
189 | EFI_EXIT(EFI_SUCCESS); | |
190 | return old_tpl; | |
bee91169 AG |
191 | } |
192 | ||
332468f7 HS |
193 | /* |
194 | * Lower the task priority level. | |
195 | * | |
196 | * This function implements the RestoreTpl service. | |
197 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
198 | * for details. | |
199 | * | |
200 | * @old_tpl value of the task priority level to be restored | |
201 | */ | |
152cade3 | 202 | static void EFIAPI efi_restore_tpl(efi_uintn_t old_tpl) |
bee91169 | 203 | { |
503f2695 | 204 | EFI_ENTRY("0x%zx", old_tpl); |
32f4b2f8 HS |
205 | |
206 | if (old_tpl > efi_tpl) | |
207 | debug("WARNING: old_tpl > current_tpl in %s\n", __func__); | |
208 | efi_tpl = old_tpl; | |
209 | if (efi_tpl > TPL_HIGH_LEVEL) | |
210 | efi_tpl = TPL_HIGH_LEVEL; | |
211 | ||
212 | EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
213 | } |
214 | ||
332468f7 HS |
215 | /* |
216 | * Allocate memory pages. | |
217 | * | |
218 | * This function implements the AllocatePages service. | |
219 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
220 | * for details. | |
221 | * | |
222 | * @type type of allocation to be performed | |
223 | * @memory_type usage type of the allocated memory | |
224 | * @pages number of pages to be allocated | |
225 | * @memory allocated memory | |
226 | * @return status code | |
227 | */ | |
6e0bf8d8 | 228 | static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type, |
f5a2a938 | 229 | efi_uintn_t pages, |
6e0bf8d8 | 230 | uint64_t *memory) |
bee91169 AG |
231 | { |
232 | efi_status_t r; | |
233 | ||
f5a2a938 | 234 | EFI_ENTRY("%d, %d, 0x%zx, %p", type, memory_type, pages, memory); |
bee91169 AG |
235 | r = efi_allocate_pages(type, memory_type, pages, memory); |
236 | return EFI_EXIT(r); | |
237 | } | |
238 | ||
332468f7 HS |
239 | /* |
240 | * Free memory pages. | |
241 | * | |
242 | * This function implements the FreePages service. | |
243 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
244 | * for details. | |
245 | * | |
246 | * @memory start of the memory area to be freed | |
247 | * @pages number of pages to be freed | |
248 | * @return status code | |
249 | */ | |
6e0bf8d8 | 250 | static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory, |
f5a2a938 | 251 | efi_uintn_t pages) |
bee91169 AG |
252 | { |
253 | efi_status_t r; | |
254 | ||
f5a2a938 | 255 | EFI_ENTRY("%"PRIx64", 0x%zx", memory, pages); |
bee91169 AG |
256 | r = efi_free_pages(memory, pages); |
257 | return EFI_EXIT(r); | |
258 | } | |
259 | ||
332468f7 HS |
260 | /* |
261 | * Get map describing memory usage. | |
262 | * | |
263 | * This function implements the GetMemoryMap service. | |
264 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
265 | * for details. | |
266 | * | |
267 | * @memory_map_size on entry the size, in bytes, of the memory map buffer, | |
268 | * on exit the size of the copied memory map | |
269 | * @memory_map buffer to which the memory map is written | |
270 | * @map_key key for the memory map | |
271 | * @descriptor_size size of an individual memory descriptor | |
272 | * @descriptor_version version number of the memory descriptor structure | |
273 | * @return status code | |
274 | */ | |
6e0bf8d8 | 275 | static efi_status_t EFIAPI efi_get_memory_map_ext( |
f5a2a938 | 276 | efi_uintn_t *memory_map_size, |
6e0bf8d8 | 277 | struct efi_mem_desc *memory_map, |
f5a2a938 HS |
278 | efi_uintn_t *map_key, |
279 | efi_uintn_t *descriptor_size, | |
6e0bf8d8 | 280 | uint32_t *descriptor_version) |
bee91169 AG |
281 | { |
282 | efi_status_t r; | |
283 | ||
284 | EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map, | |
285 | map_key, descriptor_size, descriptor_version); | |
286 | r = efi_get_memory_map(memory_map_size, memory_map, map_key, | |
287 | descriptor_size, descriptor_version); | |
288 | return EFI_EXIT(r); | |
289 | } | |
290 | ||
332468f7 HS |
291 | /* |
292 | * Allocate memory from pool. | |
293 | * | |
294 | * This function implements the AllocatePool service. | |
295 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
296 | * for details. | |
297 | * | |
298 | * @pool_type type of the pool from which memory is to be allocated | |
299 | * @size number of bytes to be allocated | |
300 | * @buffer allocated memory | |
301 | * @return status code | |
302 | */ | |
ead1274b | 303 | static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type, |
f5a2a938 | 304 | efi_uintn_t size, |
ead1274b | 305 | void **buffer) |
bee91169 | 306 | { |
1cd29f0a AG |
307 | efi_status_t r; |
308 | ||
f5a2a938 | 309 | EFI_ENTRY("%d, %zd, %p", pool_type, size, buffer); |
ead1274b | 310 | r = efi_allocate_pool(pool_type, size, buffer); |
1cd29f0a | 311 | return EFI_EXIT(r); |
bee91169 AG |
312 | } |
313 | ||
332468f7 HS |
314 | /* |
315 | * Free memory from pool. | |
316 | * | |
317 | * This function implements the FreePool service. | |
318 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
319 | * for details. | |
320 | * | |
321 | * @buffer start of memory to be freed | |
322 | * @return status code | |
323 | */ | |
42417bc8 | 324 | static efi_status_t EFIAPI efi_free_pool_ext(void *buffer) |
bee91169 | 325 | { |
1cd29f0a AG |
326 | efi_status_t r; |
327 | ||
328 | EFI_ENTRY("%p", buffer); | |
42417bc8 | 329 | r = efi_free_pool(buffer); |
1cd29f0a | 330 | return EFI_EXIT(r); |
bee91169 AG |
331 | } |
332 | ||
44549d62 HS |
333 | /* |
334 | * Add a new object to the object list. | |
335 | * | |
336 | * The protocols list is initialized. | |
337 | * The object handle is set. | |
338 | * | |
339 | * @obj object to be added | |
340 | */ | |
341 | void efi_add_handle(struct efi_object *obj) | |
342 | { | |
343 | if (!obj) | |
344 | return; | |
345 | INIT_LIST_HEAD(&obj->protocols); | |
346 | obj->handle = obj; | |
347 | list_add_tail(&obj->link, &efi_obj_list); | |
348 | } | |
349 | ||
2edab5e2 HS |
350 | /* |
351 | * Create handle. | |
352 | * | |
353 | * @handle new handle | |
354 | * @return status code | |
355 | */ | |
2074f700 | 356 | efi_status_t efi_create_handle(efi_handle_t *handle) |
3cc6e3fe HS |
357 | { |
358 | struct efi_object *obj; | |
359 | efi_status_t r; | |
360 | ||
361 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, | |
362 | sizeof(struct efi_object), | |
363 | (void **)&obj); | |
364 | if (r != EFI_SUCCESS) | |
365 | return r; | |
44549d62 HS |
366 | efi_add_handle(obj); |
367 | *handle = obj->handle; | |
3cc6e3fe HS |
368 | return r; |
369 | } | |
370 | ||
678e03a0 HS |
371 | /* |
372 | * Find a protocol on a handle. | |
373 | * | |
374 | * @handle handle | |
375 | * @protocol_guid GUID of the protocol | |
376 | * @handler reference to the protocol | |
377 | * @return status code | |
378 | */ | |
2074f700 | 379 | efi_status_t efi_search_protocol(const efi_handle_t handle, |
678e03a0 HS |
380 | const efi_guid_t *protocol_guid, |
381 | struct efi_handler **handler) | |
382 | { | |
383 | struct efi_object *efiobj; | |
384 | struct list_head *lhandle; | |
385 | ||
386 | if (!handle || !protocol_guid) | |
387 | return EFI_INVALID_PARAMETER; | |
388 | efiobj = efi_search_obj(handle); | |
389 | if (!efiobj) | |
390 | return EFI_INVALID_PARAMETER; | |
391 | list_for_each(lhandle, &efiobj->protocols) { | |
392 | struct efi_handler *protocol; | |
393 | ||
394 | protocol = list_entry(lhandle, struct efi_handler, link); | |
395 | if (!guidcmp(protocol->guid, protocol_guid)) { | |
396 | if (handler) | |
397 | *handler = protocol; | |
398 | return EFI_SUCCESS; | |
399 | } | |
400 | } | |
401 | return EFI_NOT_FOUND; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Delete protocol from a handle. | |
406 | * | |
407 | * @handle handle from which the protocol shall be deleted | |
408 | * @protocol GUID of the protocol to be deleted | |
409 | * @protocol_interface interface of the protocol implementation | |
410 | * @return status code | |
411 | */ | |
2074f700 HS |
412 | efi_status_t efi_remove_protocol(const efi_handle_t handle, |
413 | const efi_guid_t *protocol, | |
678e03a0 HS |
414 | void *protocol_interface) |
415 | { | |
416 | struct efi_handler *handler; | |
417 | efi_status_t ret; | |
418 | ||
419 | ret = efi_search_protocol(handle, protocol, &handler); | |
420 | if (ret != EFI_SUCCESS) | |
421 | return ret; | |
422 | if (guidcmp(handler->guid, protocol)) | |
423 | return EFI_INVALID_PARAMETER; | |
424 | list_del(&handler->link); | |
425 | free(handler); | |
426 | return EFI_SUCCESS; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Delete all protocols from a handle. | |
431 | * | |
432 | * @handle handle from which the protocols shall be deleted | |
433 | * @return status code | |
434 | */ | |
2074f700 | 435 | efi_status_t efi_remove_all_protocols(const efi_handle_t handle) |
678e03a0 HS |
436 | { |
437 | struct efi_object *efiobj; | |
32e6fed6 HS |
438 | struct efi_handler *protocol; |
439 | struct efi_handler *pos; | |
678e03a0 HS |
440 | |
441 | efiobj = efi_search_obj(handle); | |
442 | if (!efiobj) | |
443 | return EFI_INVALID_PARAMETER; | |
32e6fed6 | 444 | list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) { |
678e03a0 HS |
445 | efi_status_t ret; |
446 | ||
678e03a0 HS |
447 | ret = efi_remove_protocol(handle, protocol->guid, |
448 | protocol->protocol_interface); | |
449 | if (ret != EFI_SUCCESS) | |
450 | return ret; | |
451 | } | |
452 | return EFI_SUCCESS; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Delete handle. | |
457 | * | |
458 | * @handle handle to delete | |
459 | */ | |
460 | void efi_delete_handle(struct efi_object *obj) | |
461 | { | |
462 | if (!obj) | |
463 | return; | |
464 | efi_remove_all_protocols(obj->handle); | |
465 | list_del(&obj->link); | |
466 | free(obj); | |
467 | } | |
468 | ||
bee91169 | 469 | /* |
c6841592 | 470 | * Our event capabilities are very limited. Only a small limited |
471 | * number of events is allowed to coexist. | |
bee91169 | 472 | */ |
c6841592 | 473 | static struct efi_event efi_events[16]; |
bee91169 | 474 | |
332468f7 HS |
475 | /* |
476 | * Create an event. | |
477 | * | |
478 | * This function is used inside U-Boot code to create an event. | |
479 | * | |
480 | * For the API function implementing the CreateEvent service see | |
481 | * efi_create_event_ext. | |
482 | * | |
483 | * @type type of the event to create | |
484 | * @notify_tpl task priority level of the event | |
485 | * @notify_function notification function of the event | |
486 | * @notify_context pointer passed to the notification function | |
487 | * @event created event | |
488 | * @return status code | |
489 | */ | |
152cade3 | 490 | efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl, |
49deb455 | 491 | void (EFIAPI *notify_function) ( |
2fd945fe | 492 | struct efi_event *event, |
493 | void *context), | |
49deb455 | 494 | void *notify_context, struct efi_event **event) |
bee91169 | 495 | { |
c6841592 | 496 | int i; |
497 | ||
a95343b8 | 498 | if (event == NULL) |
49deb455 | 499 | return EFI_INVALID_PARAMETER; |
a95343b8 JG |
500 | |
501 | if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT)) | |
49deb455 | 502 | return EFI_INVALID_PARAMETER; |
a95343b8 JG |
503 | |
504 | if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) && | |
505 | notify_function == NULL) | |
49deb455 | 506 | return EFI_INVALID_PARAMETER; |
a95343b8 | 507 | |
c6841592 | 508 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { |
509 | if (efi_events[i].type) | |
510 | continue; | |
511 | efi_events[i].type = type; | |
512 | efi_events[i].notify_tpl = notify_tpl; | |
513 | efi_events[i].notify_function = notify_function; | |
514 | efi_events[i].notify_context = notify_context; | |
515 | /* Disable timers on bootup */ | |
516 | efi_events[i].trigger_next = -1ULL; | |
e190e897 HS |
517 | efi_events[i].is_queued = false; |
518 | efi_events[i].is_signaled = false; | |
c6841592 | 519 | *event = &efi_events[i]; |
49deb455 | 520 | return EFI_SUCCESS; |
c6841592 | 521 | } |
49deb455 | 522 | return EFI_OUT_OF_RESOURCES; |
bee91169 AG |
523 | } |
524 | ||
332468f7 HS |
525 | /* |
526 | * Create an event. | |
527 | * | |
528 | * This function implements the CreateEvent service. | |
529 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
530 | * for details. | |
531 | * | |
532 | * @type type of the event to create | |
533 | * @notify_tpl task priority level of the event | |
534 | * @notify_function notification function of the event | |
535 | * @notify_context pointer passed to the notification function | |
536 | * @event created event | |
537 | * @return status code | |
538 | */ | |
49deb455 | 539 | static efi_status_t EFIAPI efi_create_event_ext( |
152cade3 | 540 | uint32_t type, efi_uintn_t notify_tpl, |
49deb455 | 541 | void (EFIAPI *notify_function) ( |
542 | struct efi_event *event, | |
543 | void *context), | |
544 | void *notify_context, struct efi_event **event) | |
545 | { | |
546 | EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function, | |
547 | notify_context); | |
548 | return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function, | |
549 | notify_context, event)); | |
550 | } | |
551 | ||
552 | ||
bee91169 | 553 | /* |
332468f7 HS |
554 | * Check if a timer event has occurred or a queued notification function should |
555 | * be called. | |
556 | * | |
bee91169 | 557 | * Our timers have to work without interrupts, so we check whenever keyboard |
332468f7 | 558 | * input or disk accesses happen if enough time elapsed for them to fire. |
bee91169 AG |
559 | */ |
560 | void efi_timer_check(void) | |
561 | { | |
c6841592 | 562 | int i; |
bee91169 AG |
563 | u64 now = timer_get_us(); |
564 | ||
c6841592 | 565 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { |
ca62a4f5 HS |
566 | if (!efi_events[i].type) |
567 | continue; | |
e190e897 | 568 | if (efi_events[i].is_queued) |
9bc9664d | 569 | efi_signal_event(&efi_events[i], true); |
ca62a4f5 | 570 | if (!(efi_events[i].type & EVT_TIMER) || |
c6841592 | 571 | now < efi_events[i].trigger_next) |
572 | continue; | |
ca62a4f5 HS |
573 | switch (efi_events[i].trigger_type) { |
574 | case EFI_TIMER_RELATIVE: | |
575 | efi_events[i].trigger_type = EFI_TIMER_STOP; | |
576 | break; | |
577 | case EFI_TIMER_PERIODIC: | |
c6841592 | 578 | efi_events[i].trigger_next += |
8787b02e | 579 | efi_events[i].trigger_time; |
ca62a4f5 HS |
580 | break; |
581 | default: | |
582 | continue; | |
c6841592 | 583 | } |
e190e897 | 584 | efi_events[i].is_signaled = true; |
9bc9664d | 585 | efi_signal_event(&efi_events[i], true); |
bee91169 | 586 | } |
bee91169 AG |
587 | WATCHDOG_RESET(); |
588 | } | |
589 | ||
332468f7 HS |
590 | /* |
591 | * Set the trigger time for a timer event or stop the event. | |
592 | * | |
593 | * This is the function for internal usage in U-Boot. For the API function | |
594 | * implementing the SetTimer service see efi_set_timer_ext. | |
595 | * | |
596 | * @event event for which the timer is set | |
597 | * @type type of the timer | |
598 | * @trigger_time trigger period in multiples of 100ns | |
599 | * @return status code | |
600 | */ | |
b521d29e | 601 | efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, |
bfc72462 | 602 | uint64_t trigger_time) |
bee91169 | 603 | { |
c6841592 | 604 | int i; |
bee91169 | 605 | |
8787b02e | 606 | /* |
607 | * The parameter defines a multiple of 100ns. | |
608 | * We use multiples of 1000ns. So divide by 10. | |
609 | */ | |
7d963323 | 610 | do_div(trigger_time, 10); |
bee91169 | 611 | |
c6841592 | 612 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { |
613 | if (event != &efi_events[i]) | |
614 | continue; | |
bee91169 | 615 | |
c6841592 | 616 | if (!(event->type & EVT_TIMER)) |
617 | break; | |
618 | switch (type) { | |
619 | case EFI_TIMER_STOP: | |
620 | event->trigger_next = -1ULL; | |
621 | break; | |
622 | case EFI_TIMER_PERIODIC: | |
623 | case EFI_TIMER_RELATIVE: | |
624 | event->trigger_next = | |
8787b02e | 625 | timer_get_us() + trigger_time; |
c6841592 | 626 | break; |
627 | default: | |
bfc72462 | 628 | return EFI_INVALID_PARAMETER; |
c6841592 | 629 | } |
630 | event->trigger_type = type; | |
631 | event->trigger_time = trigger_time; | |
e190e897 | 632 | event->is_signaled = false; |
bfc72462 | 633 | return EFI_SUCCESS; |
bee91169 | 634 | } |
bfc72462 | 635 | return EFI_INVALID_PARAMETER; |
636 | } | |
637 | ||
332468f7 HS |
638 | /* |
639 | * Set the trigger time for a timer event or stop the event. | |
640 | * | |
641 | * This function implements the SetTimer service. | |
642 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
643 | * for details. | |
644 | * | |
645 | * @event event for which the timer is set | |
646 | * @type type of the timer | |
647 | * @trigger_time trigger period in multiples of 100ns | |
648 | * @return status code | |
649 | */ | |
b521d29e | 650 | static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event, |
651 | enum efi_timer_delay type, | |
652 | uint64_t trigger_time) | |
bfc72462 | 653 | { |
654 | EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time); | |
655 | return EFI_EXIT(efi_set_timer(event, type, trigger_time)); | |
bee91169 AG |
656 | } |
657 | ||
332468f7 HS |
658 | /* |
659 | * Wait for events to be signaled. | |
660 | * | |
661 | * This function implements the WaitForEvent service. | |
662 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
663 | * for details. | |
664 | * | |
665 | * @num_events number of events to be waited for | |
666 | * @events events to be waited for | |
667 | * @index index of the event that was signaled | |
668 | * @return status code | |
669 | */ | |
f5a2a938 | 670 | static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events, |
2fd945fe | 671 | struct efi_event **event, |
f5a2a938 | 672 | efi_uintn_t *index) |
bee91169 | 673 | { |
c6841592 | 674 | int i, j; |
bee91169 | 675 | |
f5a2a938 | 676 | EFI_ENTRY("%zd, %p, %p", num_events, event, index); |
bee91169 | 677 | |
c6841592 | 678 | /* Check parameters */ |
679 | if (!num_events || !event) | |
680 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
32f4b2f8 HS |
681 | /* Check TPL */ |
682 | if (efi_tpl != TPL_APPLICATION) | |
683 | return EFI_EXIT(EFI_UNSUPPORTED); | |
c6841592 | 684 | for (i = 0; i < num_events; ++i) { |
685 | for (j = 0; j < ARRAY_SIZE(efi_events); ++j) { | |
686 | if (event[i] == &efi_events[j]) | |
687 | goto known_event; | |
688 | } | |
689 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
690 | known_event: | |
691 | if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL) | |
692 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
e190e897 | 693 | if (!event[i]->is_signaled) |
9bc9664d | 694 | efi_signal_event(event[i], true); |
c6841592 | 695 | } |
696 | ||
697 | /* Wait for signal */ | |
698 | for (;;) { | |
699 | for (i = 0; i < num_events; ++i) { | |
e190e897 | 700 | if (event[i]->is_signaled) |
c6841592 | 701 | goto out; |
702 | } | |
703 | /* Allow events to occur. */ | |
704 | efi_timer_check(); | |
705 | } | |
706 | ||
707 | out: | |
708 | /* | |
709 | * Reset the signal which is passed to the caller to allow periodic | |
710 | * events to occur. | |
711 | */ | |
e190e897 | 712 | event[i]->is_signaled = false; |
c6841592 | 713 | if (index) |
714 | *index = i; | |
bee91169 AG |
715 | |
716 | return EFI_EXIT(EFI_SUCCESS); | |
717 | } | |
718 | ||
332468f7 HS |
719 | /* |
720 | * Signal an EFI event. | |
721 | * | |
722 | * This function implements the SignalEvent service. | |
723 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
724 | * for details. | |
725 | * | |
726 | * This functions sets the signaled state of the event and queues the | |
727 | * notification function for execution. | |
728 | * | |
729 | * @event event to signal | |
10a08c4e | 730 | * @return status code |
332468f7 | 731 | */ |
c6841592 | 732 | static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event) |
bee91169 | 733 | { |
c6841592 | 734 | int i; |
735 | ||
bee91169 | 736 | EFI_ENTRY("%p", event); |
c6841592 | 737 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { |
738 | if (event != &efi_events[i]) | |
739 | continue; | |
e190e897 | 740 | if (event->is_signaled) |
ca62a4f5 | 741 | break; |
e190e897 | 742 | event->is_signaled = true; |
ca62a4f5 | 743 | if (event->type & EVT_NOTIFY_SIGNAL) |
9bc9664d | 744 | efi_signal_event(event, true); |
c6841592 | 745 | break; |
746 | } | |
bee91169 AG |
747 | return EFI_EXIT(EFI_SUCCESS); |
748 | } | |
749 | ||
332468f7 HS |
750 | /* |
751 | * Close an EFI event. | |
752 | * | |
753 | * This function implements the CloseEvent service. | |
754 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
755 | * for details. | |
756 | * | |
757 | * @event event to close | |
758 | * @return status code | |
759 | */ | |
2fd945fe | 760 | static efi_status_t EFIAPI efi_close_event(struct efi_event *event) |
bee91169 | 761 | { |
c6841592 | 762 | int i; |
763 | ||
bee91169 | 764 | EFI_ENTRY("%p", event); |
c6841592 | 765 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { |
766 | if (event == &efi_events[i]) { | |
767 | event->type = 0; | |
768 | event->trigger_next = -1ULL; | |
e190e897 HS |
769 | event->is_queued = false; |
770 | event->is_signaled = false; | |
c6841592 | 771 | return EFI_EXIT(EFI_SUCCESS); |
772 | } | |
773 | } | |
774 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
bee91169 AG |
775 | } |
776 | ||
332468f7 HS |
777 | /* |
778 | * Check if an event is signaled. | |
779 | * | |
780 | * This function implements the CheckEvent service. | |
781 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
782 | * for details. | |
783 | * | |
784 | * If an event is not signaled yet the notification function is queued. | |
785 | * | |
786 | * @event event to check | |
787 | * @return status code | |
788 | */ | |
2fd945fe | 789 | static efi_status_t EFIAPI efi_check_event(struct efi_event *event) |
bee91169 | 790 | { |
c6841592 | 791 | int i; |
792 | ||
bee91169 | 793 | EFI_ENTRY("%p", event); |
c6841592 | 794 | efi_timer_check(); |
795 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { | |
796 | if (event != &efi_events[i]) | |
797 | continue; | |
798 | if (!event->type || event->type & EVT_NOTIFY_SIGNAL) | |
799 | break; | |
e190e897 | 800 | if (!event->is_signaled) |
9bc9664d | 801 | efi_signal_event(event, true); |
e190e897 | 802 | if (event->is_signaled) |
c6841592 | 803 | return EFI_EXIT(EFI_SUCCESS); |
804 | return EFI_EXIT(EFI_NOT_READY); | |
805 | } | |
806 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
bee91169 AG |
807 | } |
808 | ||
7b9f8ad7 HS |
809 | /* |
810 | * Find the internal EFI object for a handle. | |
811 | * | |
812 | * @handle handle to find | |
813 | * @return EFI object | |
814 | */ | |
2074f700 | 815 | struct efi_object *efi_search_obj(const efi_handle_t handle) |
7b9f8ad7 | 816 | { |
1b68153a | 817 | struct efi_object *efiobj; |
7b9f8ad7 | 818 | |
1b68153a | 819 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
7b9f8ad7 HS |
820 | if (efiobj->handle == handle) |
821 | return efiobj; | |
822 | } | |
823 | ||
824 | return NULL; | |
825 | } | |
826 | ||
fe1599da HS |
827 | /* |
828 | * Create open protocol info entry and add it to a protocol. | |
829 | * | |
830 | * @handler handler of a protocol | |
831 | * @return open protocol info entry | |
832 | */ | |
833 | static struct efi_open_protocol_info_entry *efi_create_open_info( | |
834 | struct efi_handler *handler) | |
835 | { | |
836 | struct efi_open_protocol_info_item *item; | |
837 | ||
838 | item = calloc(1, sizeof(struct efi_open_protocol_info_item)); | |
839 | if (!item) | |
840 | return NULL; | |
841 | /* Append the item to the open protocol info list. */ | |
842 | list_add_tail(&item->link, &handler->open_infos); | |
843 | ||
844 | return &item->info; | |
845 | } | |
846 | ||
847 | /* | |
848 | * Remove an open protocol info entry from a protocol. | |
849 | * | |
850 | * @handler handler of a protocol | |
851 | * @return status code | |
852 | */ | |
853 | static efi_status_t efi_delete_open_info( | |
854 | struct efi_open_protocol_info_item *item) | |
855 | { | |
856 | list_del(&item->link); | |
857 | free(item); | |
858 | return EFI_SUCCESS; | |
859 | } | |
860 | ||
3f79a2b5 HS |
861 | /* |
862 | * Install new protocol on a handle. | |
863 | * | |
864 | * @handle handle on which the protocol shall be installed | |
865 | * @protocol GUID of the protocol to be installed | |
866 | * @protocol_interface interface of the protocol implementation | |
867 | * @return status code | |
868 | */ | |
2074f700 HS |
869 | efi_status_t efi_add_protocol(const efi_handle_t handle, |
870 | const efi_guid_t *protocol, | |
3f79a2b5 HS |
871 | void *protocol_interface) |
872 | { | |
873 | struct efi_object *efiobj; | |
874 | struct efi_handler *handler; | |
875 | efi_status_t ret; | |
3f79a2b5 HS |
876 | |
877 | efiobj = efi_search_obj(handle); | |
878 | if (!efiobj) | |
879 | return EFI_INVALID_PARAMETER; | |
880 | ret = efi_search_protocol(handle, protocol, NULL); | |
881 | if (ret != EFI_NOT_FOUND) | |
882 | return EFI_INVALID_PARAMETER; | |
883 | handler = calloc(1, sizeof(struct efi_handler)); | |
884 | if (!handler) | |
885 | return EFI_OUT_OF_RESOURCES; | |
69fb6b1a HS |
886 | handler->guid = protocol; |
887 | handler->protocol_interface = protocol_interface; | |
fe1599da | 888 | INIT_LIST_HEAD(&handler->open_infos); |
69fb6b1a | 889 | list_add_tail(&handler->link, &efiobj->protocols); |
d5504144 HS |
890 | if (!guidcmp(&efi_guid_device_path, protocol)) |
891 | EFI_PRINT("installed device path '%pD'\n", protocol_interface); | |
69fb6b1a | 892 | return EFI_SUCCESS; |
3f79a2b5 HS |
893 | } |
894 | ||
332468f7 HS |
895 | /* |
896 | * Install protocol interface. | |
897 | * | |
1760ef57 HS |
898 | * This function implements the InstallProtocolInterface service. |
899 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
900 | * for details. | |
332468f7 HS |
901 | * |
902 | * @handle handle on which the protocol shall be installed | |
903 | * @protocol GUID of the protocol to be installed | |
904 | * @protocol_interface_type type of the interface to be installed, | |
905 | * always EFI_NATIVE_INTERFACE | |
906 | * @protocol_interface interface of the protocol implementation | |
907 | * @return status code | |
908 | */ | |
1760ef57 HS |
909 | static efi_status_t EFIAPI efi_install_protocol_interface( |
910 | void **handle, const efi_guid_t *protocol, | |
911 | int protocol_interface_type, void *protocol_interface) | |
bee91169 | 912 | { |
e0549f8a | 913 | efi_status_t r; |
914 | ||
1760ef57 HS |
915 | EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type, |
916 | protocol_interface); | |
917 | ||
e0549f8a | 918 | if (!handle || !protocol || |
919 | protocol_interface_type != EFI_NATIVE_INTERFACE) { | |
920 | r = EFI_INVALID_PARAMETER; | |
921 | goto out; | |
922 | } | |
923 | ||
924 | /* Create new handle if requested. */ | |
925 | if (!*handle) { | |
3cc6e3fe HS |
926 | r = efi_create_handle(handle); |
927 | if (r != EFI_SUCCESS) | |
928 | goto out; | |
af1408e0 HS |
929 | debug("%sEFI: new handle %p\n", indent_string(nesting_level), |
930 | *handle); | |
931 | } else { | |
932 | debug("%sEFI: handle %p\n", indent_string(nesting_level), | |
933 | *handle); | |
e0549f8a | 934 | } |
1202530d HS |
935 | /* Add new protocol */ |
936 | r = efi_add_protocol(*handle, protocol, protocol_interface); | |
e0549f8a | 937 | out: |
1760ef57 | 938 | return EFI_EXIT(r); |
bee91169 | 939 | } |
e0549f8a | 940 | |
332468f7 HS |
941 | /* |
942 | * Reinstall protocol interface. | |
943 | * | |
944 | * This function implements the ReinstallProtocolInterface service. | |
945 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
946 | * for details. | |
947 | * | |
948 | * @handle handle on which the protocol shall be | |
949 | * reinstalled | |
950 | * @protocol GUID of the protocol to be installed | |
951 | * @old_interface interface to be removed | |
952 | * @new_interface interface to be installed | |
953 | * @return status code | |
954 | */ | |
2074f700 HS |
955 | static efi_status_t EFIAPI efi_reinstall_protocol_interface( |
956 | efi_handle_t handle, const efi_guid_t *protocol, | |
957 | void *old_interface, void *new_interface) | |
bee91169 | 958 | { |
778e6af8 | 959 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface, |
bee91169 AG |
960 | new_interface); |
961 | return EFI_EXIT(EFI_ACCESS_DENIED); | |
962 | } | |
963 | ||
3f9b0042 HS |
964 | /* |
965 | * Get all drivers associated to a controller. | |
966 | * The allocated buffer has to be freed with free(). | |
967 | * | |
968 | * @efiobj handle of the controller | |
969 | * @protocol protocol guid (optional) | |
970 | * @number_of_drivers number of child controllers | |
971 | * @driver_handle_buffer handles of the the drivers | |
972 | * @return status code | |
973 | */ | |
974 | static efi_status_t efi_get_drivers(struct efi_object *efiobj, | |
975 | const efi_guid_t *protocol, | |
976 | efi_uintn_t *number_of_drivers, | |
977 | efi_handle_t **driver_handle_buffer) | |
978 | { | |
979 | struct efi_handler *handler; | |
980 | struct efi_open_protocol_info_item *item; | |
981 | efi_uintn_t count = 0, i; | |
982 | bool duplicate; | |
983 | ||
984 | /* Count all driver associations */ | |
985 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
986 | if (protocol && guidcmp(handler->guid, protocol)) | |
987 | continue; | |
988 | list_for_each_entry(item, &handler->open_infos, link) { | |
989 | if (item->info.attributes & | |
990 | EFI_OPEN_PROTOCOL_BY_DRIVER) | |
991 | ++count; | |
992 | } | |
993 | } | |
994 | /* | |
995 | * Create buffer. In case of duplicate driver assignments the buffer | |
996 | * will be too large. But that does not harm. | |
997 | */ | |
998 | *number_of_drivers = 0; | |
999 | *driver_handle_buffer = calloc(count, sizeof(efi_handle_t)); | |
1000 | if (!*driver_handle_buffer) | |
1001 | return EFI_OUT_OF_RESOURCES; | |
1002 | /* Collect unique driver handles */ | |
1003 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
1004 | if (protocol && guidcmp(handler->guid, protocol)) | |
1005 | continue; | |
1006 | list_for_each_entry(item, &handler->open_infos, link) { | |
1007 | if (item->info.attributes & | |
1008 | EFI_OPEN_PROTOCOL_BY_DRIVER) { | |
1009 | /* Check this is a new driver */ | |
1010 | duplicate = false; | |
1011 | for (i = 0; i < *number_of_drivers; ++i) { | |
1012 | if ((*driver_handle_buffer)[i] == | |
1013 | item->info.agent_handle) | |
1014 | duplicate = true; | |
1015 | } | |
1016 | /* Copy handle to buffer */ | |
1017 | if (!duplicate) { | |
1018 | i = (*number_of_drivers)++; | |
1019 | (*driver_handle_buffer)[i] = | |
1020 | item->info.agent_handle; | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | return EFI_SUCCESS; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Disconnect all drivers from a controller. | |
1030 | * | |
1031 | * This function implements the DisconnectController service. | |
1032 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1033 | * for details. | |
1034 | * | |
1035 | * @efiobj handle of the controller | |
1036 | * @protocol protocol guid (optional) | |
1037 | * @child_handle handle of the child to destroy | |
1038 | * @return status code | |
1039 | */ | |
1040 | static efi_status_t efi_disconnect_all_drivers( | |
1041 | struct efi_object *efiobj, | |
1042 | const efi_guid_t *protocol, | |
1043 | efi_handle_t child_handle) | |
1044 | { | |
1045 | efi_uintn_t number_of_drivers; | |
1046 | efi_handle_t *driver_handle_buffer; | |
1047 | efi_status_t r, ret; | |
1048 | ||
1049 | ret = efi_get_drivers(efiobj, protocol, &number_of_drivers, | |
1050 | &driver_handle_buffer); | |
1051 | if (ret != EFI_SUCCESS) | |
1052 | return ret; | |
1053 | ||
1054 | ret = EFI_NOT_FOUND; | |
1055 | while (number_of_drivers) { | |
1056 | r = EFI_CALL(efi_disconnect_controller( | |
1057 | efiobj->handle, | |
1058 | driver_handle_buffer[--number_of_drivers], | |
1059 | child_handle)); | |
1060 | if (r == EFI_SUCCESS) | |
1061 | ret = r; | |
1062 | } | |
1063 | free(driver_handle_buffer); | |
1064 | return ret; | |
1065 | } | |
1066 | ||
332468f7 HS |
1067 | /* |
1068 | * Uninstall protocol interface. | |
1069 | * | |
cd534083 HS |
1070 | * This function implements the UninstallProtocolInterface service. |
1071 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1072 | * for details. | |
332468f7 HS |
1073 | * |
1074 | * @handle handle from which the protocol shall be removed | |
1075 | * @protocol GUID of the protocol to be removed | |
1076 | * @protocol_interface interface to be removed | |
1077 | * @return status code | |
1078 | */ | |
cd534083 | 1079 | static efi_status_t EFIAPI efi_uninstall_protocol_interface( |
2074f700 | 1080 | efi_handle_t handle, const efi_guid_t *protocol, |
cd534083 | 1081 | void *protocol_interface) |
bee91169 | 1082 | { |
ad97373b | 1083 | struct efi_object *efiobj; |
5810511d | 1084 | struct efi_handler *handler; |
ad97373b HS |
1085 | struct efi_open_protocol_info_item *item; |
1086 | struct efi_open_protocol_info_item *pos; | |
5810511d | 1087 | efi_status_t r; |
4b6ed0d7 | 1088 | |
cd534083 HS |
1089 | EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface); |
1090 | ||
ad97373b HS |
1091 | /* Check handle */ |
1092 | efiobj = efi_search_obj(handle); | |
1093 | if (!efiobj) { | |
4b6ed0d7 | 1094 | r = EFI_INVALID_PARAMETER; |
1095 | goto out; | |
1096 | } | |
5810511d HS |
1097 | /* Find the protocol on the handle */ |
1098 | r = efi_search_protocol(handle, protocol, &handler); | |
1099 | if (r != EFI_SUCCESS) | |
1100 | goto out; | |
ad97373b HS |
1101 | /* Disconnect controllers */ |
1102 | efi_disconnect_all_drivers(efiobj, protocol, NULL); | |
1103 | if (!list_empty(&handler->open_infos)) { | |
5810511d | 1104 | r = EFI_ACCESS_DENIED; |
ad97373b HS |
1105 | goto out; |
1106 | } | |
1107 | /* Close protocol */ | |
1108 | list_for_each_entry_safe(item, pos, &handler->open_infos, link) { | |
1109 | if (item->info.attributes == | |
1110 | EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL || | |
1111 | item->info.attributes == EFI_OPEN_PROTOCOL_GET_PROTOCOL || | |
1112 | item->info.attributes == EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
1113 | list_del(&item->link); | |
1114 | } | |
1115 | if (!list_empty(&handler->open_infos)) { | |
1116 | r = EFI_ACCESS_DENIED; | |
1117 | goto out; | |
4b6ed0d7 | 1118 | } |
ad97373b | 1119 | r = efi_remove_protocol(handle, protocol, protocol_interface); |
4b6ed0d7 | 1120 | out: |
cd534083 | 1121 | return EFI_EXIT(r); |
bee91169 AG |
1122 | } |
1123 | ||
332468f7 HS |
1124 | /* |
1125 | * Register an event for notification when a protocol is installed. | |
1126 | * | |
1127 | * This function implements the RegisterProtocolNotify service. | |
1128 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1129 | * for details. | |
1130 | * | |
1131 | * @protocol GUID of the protocol whose installation shall be | |
1132 | * notified | |
1133 | * @event event to be signaled upon installation of the protocol | |
1134 | * @registration key for retrieving the registration information | |
1135 | * @return status code | |
1136 | */ | |
5a9682d0 HS |
1137 | static efi_status_t EFIAPI efi_register_protocol_notify( |
1138 | const efi_guid_t *protocol, | |
1139 | struct efi_event *event, | |
1140 | void **registration) | |
bee91169 | 1141 | { |
778e6af8 | 1142 | EFI_ENTRY("%pUl, %p, %p", protocol, event, registration); |
bee91169 AG |
1143 | return EFI_EXIT(EFI_OUT_OF_RESOURCES); |
1144 | } | |
1145 | ||
332468f7 HS |
1146 | /* |
1147 | * Determine if an EFI handle implements a protocol. | |
1148 | * | |
1149 | * See the documentation of the LocateHandle service in the UEFI specification. | |
1150 | * | |
1151 | * @search_type selection criterion | |
1152 | * @protocol GUID of the protocol | |
1153 | * @search_key registration key | |
1154 | * @efiobj handle | |
1155 | * @return 0 if the handle implements the protocol | |
1156 | */ | |
bee91169 | 1157 | static int efi_search(enum efi_locate_search_type search_type, |
5a9682d0 | 1158 | const efi_guid_t *protocol, void *search_key, |
bee91169 AG |
1159 | struct efi_object *efiobj) |
1160 | { | |
42cf1242 | 1161 | efi_status_t ret; |
bee91169 AG |
1162 | |
1163 | switch (search_type) { | |
9f0770ff | 1164 | case ALL_HANDLES: |
bee91169 | 1165 | return 0; |
9f0770ff | 1166 | case BY_REGISTER_NOTIFY: |
42cf1242 | 1167 | /* TODO: RegisterProtocolNotify is not implemented yet */ |
bee91169 | 1168 | return -1; |
9f0770ff | 1169 | case BY_PROTOCOL: |
42cf1242 HS |
1170 | ret = efi_search_protocol(efiobj->handle, protocol, NULL); |
1171 | return (ret != EFI_SUCCESS); | |
1172 | default: | |
1173 | /* Invalid search type */ | |
bee91169 AG |
1174 | return -1; |
1175 | } | |
bee91169 AG |
1176 | } |
1177 | ||
332468f7 HS |
1178 | /* |
1179 | * Locate handles implementing a protocol. | |
1180 | * | |
1181 | * This function is meant for U-Boot internal calls. For the API implementation | |
1182 | * of the LocateHandle service see efi_locate_handle_ext. | |
1183 | * | |
1184 | * @search_type selection criterion | |
1185 | * @protocol GUID of the protocol | |
1186 | * @search_key registration key | |
1187 | * @buffer_size size of the buffer to receive the handles in bytes | |
1188 | * @buffer buffer to receive the relevant handles | |
1189 | * @return status code | |
1190 | */ | |
ebf199b9 | 1191 | static efi_status_t efi_locate_handle( |
bee91169 | 1192 | enum efi_locate_search_type search_type, |
5a9682d0 | 1193 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 1194 | efi_uintn_t *buffer_size, efi_handle_t *buffer) |
bee91169 | 1195 | { |
caf864e4 | 1196 | struct efi_object *efiobj; |
f5a2a938 | 1197 | efi_uintn_t size = 0; |
bee91169 | 1198 | |
caf864e4 HS |
1199 | /* Check parameters */ |
1200 | switch (search_type) { | |
1201 | case ALL_HANDLES: | |
1202 | break; | |
1203 | case BY_REGISTER_NOTIFY: | |
1204 | if (!search_key) | |
1205 | return EFI_INVALID_PARAMETER; | |
1206 | /* RegisterProtocolNotify is not implemented yet */ | |
1207 | return EFI_UNSUPPORTED; | |
1208 | case BY_PROTOCOL: | |
1209 | if (!protocol) | |
1210 | return EFI_INVALID_PARAMETER; | |
1211 | break; | |
1212 | default: | |
1213 | return EFI_INVALID_PARAMETER; | |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * efi_locate_handle_buffer uses this function for | |
1218 | * the calculation of the necessary buffer size. | |
1219 | * So do not require a buffer for buffersize == 0. | |
1220 | */ | |
1221 | if (!buffer_size || (*buffer_size && !buffer)) | |
1222 | return EFI_INVALID_PARAMETER; | |
1223 | ||
bee91169 | 1224 | /* Count how much space we need */ |
caf864e4 HS |
1225 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
1226 | if (!efi_search(search_type, protocol, search_key, efiobj)) | |
bee91169 | 1227 | size += sizeof(void*); |
bee91169 AG |
1228 | } |
1229 | ||
1230 | if (*buffer_size < size) { | |
1231 | *buffer_size = size; | |
26329584 | 1232 | return EFI_BUFFER_TOO_SMALL; |
bee91169 AG |
1233 | } |
1234 | ||
796a78cb RC |
1235 | *buffer_size = size; |
1236 | if (size == 0) | |
1237 | return EFI_NOT_FOUND; | |
1238 | ||
bee91169 | 1239 | /* Then fill the array */ |
caf864e4 HS |
1240 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
1241 | if (!efi_search(search_type, protocol, search_key, efiobj)) | |
1242 | *buffer++ = efiobj->handle; | |
bee91169 AG |
1243 | } |
1244 | ||
26329584 | 1245 | return EFI_SUCCESS; |
1246 | } | |
1247 | ||
332468f7 HS |
1248 | /* |
1249 | * Locate handles implementing a protocol. | |
1250 | * | |
1251 | * This function implements the LocateHandle service. | |
1252 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1253 | * for details. | |
1254 | * | |
1255 | * @search_type selection criterion | |
1256 | * @protocol GUID of the protocol | |
1257 | * @search_key registration key | |
1258 | * @buffer_size size of the buffer to receive the handles in bytes | |
1259 | * @buffer buffer to receive the relevant handles | |
1260 | * @return 0 if the handle implements the protocol | |
1261 | */ | |
26329584 | 1262 | static efi_status_t EFIAPI efi_locate_handle_ext( |
1263 | enum efi_locate_search_type search_type, | |
5a9682d0 | 1264 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 1265 | efi_uintn_t *buffer_size, efi_handle_t *buffer) |
26329584 | 1266 | { |
778e6af8 | 1267 | EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, |
26329584 | 1268 | buffer_size, buffer); |
1269 | ||
1270 | return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key, | |
1271 | buffer_size, buffer)); | |
bee91169 AG |
1272 | } |
1273 | ||
d98cdf6a AG |
1274 | /* Collapses configuration table entries, removing index i */ |
1275 | static void efi_remove_configuration_table(int i) | |
1276 | { | |
1277 | struct efi_configuration_table *this = &efi_conf_table[i]; | |
1278 | struct efi_configuration_table *next = &efi_conf_table[i+1]; | |
1279 | struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables]; | |
1280 | ||
1281 | memmove(this, next, (ulong)end - (ulong)next); | |
1282 | systab.nr_tables--; | |
1283 | } | |
1284 | ||
332468f7 HS |
1285 | /* |
1286 | * Adds, updates, or removes a configuration table. | |
1287 | * | |
1288 | * This function is used for internal calls. For the API implementation of the | |
1289 | * InstallConfigurationTable service see efi_install_configuration_table_ext. | |
1290 | * | |
1291 | * @guid GUID of the installed table | |
1292 | * @table table to be installed | |
1293 | * @return status code | |
1294 | */ | |
488bf12d | 1295 | efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table) |
bee91169 AG |
1296 | { |
1297 | int i; | |
1298 | ||
bee91169 AG |
1299 | /* Check for guid override */ |
1300 | for (i = 0; i < systab.nr_tables; i++) { | |
1301 | if (!guidcmp(guid, &efi_conf_table[i].guid)) { | |
d98cdf6a AG |
1302 | if (table) |
1303 | efi_conf_table[i].table = table; | |
1304 | else | |
1305 | efi_remove_configuration_table(i); | |
488bf12d | 1306 | return EFI_SUCCESS; |
bee91169 AG |
1307 | } |
1308 | } | |
1309 | ||
d98cdf6a AG |
1310 | if (!table) |
1311 | return EFI_NOT_FOUND; | |
1312 | ||
bee91169 AG |
1313 | /* No override, check for overflow */ |
1314 | if (i >= ARRAY_SIZE(efi_conf_table)) | |
488bf12d | 1315 | return EFI_OUT_OF_RESOURCES; |
bee91169 AG |
1316 | |
1317 | /* Add a new entry */ | |
1318 | memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid)); | |
1319 | efi_conf_table[i].table = table; | |
aba5e919 | 1320 | systab.nr_tables = i + 1; |
bee91169 | 1321 | |
488bf12d AG |
1322 | return EFI_SUCCESS; |
1323 | } | |
1324 | ||
332468f7 HS |
1325 | /* |
1326 | * Adds, updates, or removes a configuration table. | |
1327 | * | |
1328 | * This function implements the InstallConfigurationTable service. | |
1329 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1330 | * for details. | |
1331 | * | |
1332 | * @guid GUID of the installed table | |
1333 | * @table table to be installed | |
1334 | * @return status code | |
1335 | */ | |
488bf12d AG |
1336 | static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid, |
1337 | void *table) | |
1338 | { | |
778e6af8 | 1339 | EFI_ENTRY("%pUl, %p", guid, table); |
488bf12d | 1340 | return EFI_EXIT(efi_install_configuration_table(guid, table)); |
bee91169 AG |
1341 | } |
1342 | ||
332468f7 HS |
1343 | /* |
1344 | * Initialize a loaded_image_info + loaded_image_info object with correct | |
95c5553e | 1345 | * protocols, boot-device, etc. |
332468f7 | 1346 | * |
10a08c4e | 1347 | * @info loaded image info to be passed to the entry point of the |
332468f7 HS |
1348 | * image |
1349 | * @obj internal object associated with the loaded image | |
1350 | * @device_path device path of the loaded image | |
1351 | * @file_path file path of the loaded image | |
56d92888 | 1352 | * @return status code |
95c5553e | 1353 | */ |
56d92888 HS |
1354 | efi_status_t efi_setup_loaded_image( |
1355 | struct efi_loaded_image *info, struct efi_object *obj, | |
1356 | struct efi_device_path *device_path, | |
1357 | struct efi_device_path *file_path) | |
95c5553e | 1358 | { |
48b66230 HS |
1359 | efi_status_t ret; |
1360 | ||
44549d62 HS |
1361 | /* Add internal object to object list */ |
1362 | efi_add_handle(obj); | |
1363 | /* efi_exit() assumes that the handle points to the info */ | |
95c5553e RC |
1364 | obj->handle = info; |
1365 | ||
48b66230 HS |
1366 | info->file_path = file_path; |
1367 | if (device_path) | |
1368 | info->device_handle = efi_dp_find_obj(device_path, NULL); | |
1369 | ||
95c5553e RC |
1370 | /* |
1371 | * When asking for the device path interface, return | |
1372 | * bootefi_device_path | |
1373 | */ | |
48b66230 HS |
1374 | ret = efi_add_protocol(obj->handle, &efi_guid_device_path, device_path); |
1375 | if (ret != EFI_SUCCESS) | |
1376 | goto failure; | |
95c5553e RC |
1377 | |
1378 | /* | |
1379 | * When asking for the loaded_image interface, just | |
1380 | * return handle which points to loaded_image_info | |
1381 | */ | |
48b66230 HS |
1382 | ret = efi_add_protocol(obj->handle, &efi_guid_loaded_image, info); |
1383 | if (ret != EFI_SUCCESS) | |
1384 | goto failure; | |
95c5553e | 1385 | |
48b66230 HS |
1386 | ret = efi_add_protocol(obj->handle, &efi_guid_console_control, |
1387 | (void *)&efi_console_control); | |
1388 | if (ret != EFI_SUCCESS) | |
1389 | goto failure; | |
95c5553e | 1390 | |
48b66230 HS |
1391 | ret = efi_add_protocol(obj->handle, |
1392 | &efi_guid_device_path_to_text_protocol, | |
1393 | (void *)&efi_device_path_to_text); | |
1394 | if (ret != EFI_SUCCESS) | |
1395 | goto failure; | |
95c5553e | 1396 | |
56d92888 | 1397 | return ret; |
48b66230 HS |
1398 | failure: |
1399 | printf("ERROR: Failure to install protocols for loaded image\n"); | |
56d92888 | 1400 | return ret; |
95c5553e RC |
1401 | } |
1402 | ||
332468f7 HS |
1403 | /* |
1404 | * Load an image using a file path. | |
1405 | * | |
1406 | * @file_path the path of the image to load | |
1407 | * @buffer buffer containing the loaded image | |
10a08c4e | 1408 | * @return status code |
332468f7 | 1409 | */ |
9975fe96 RC |
1410 | efi_status_t efi_load_image_from_path(struct efi_device_path *file_path, |
1411 | void **buffer) | |
838ee4b4 RC |
1412 | { |
1413 | struct efi_file_info *info = NULL; | |
1414 | struct efi_file_handle *f; | |
1415 | static efi_status_t ret; | |
1416 | uint64_t bs; | |
1417 | ||
1418 | f = efi_file_from_path(file_path); | |
1419 | if (!f) | |
1420 | return EFI_DEVICE_ERROR; | |
1421 | ||
1422 | bs = 0; | |
1423 | EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, | |
1424 | &bs, info)); | |
1425 | if (ret == EFI_BUFFER_TOO_SMALL) { | |
1426 | info = malloc(bs); | |
1427 | EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, | |
1428 | &bs, info)); | |
1429 | } | |
1430 | if (ret != EFI_SUCCESS) | |
1431 | goto error; | |
1432 | ||
1433 | ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer); | |
1434 | if (ret) | |
1435 | goto error; | |
1436 | ||
1437 | EFI_CALL(ret = f->read(f, &info->file_size, *buffer)); | |
1438 | ||
1439 | error: | |
1440 | free(info); | |
1441 | EFI_CALL(f->close(f)); | |
1442 | ||
1443 | if (ret != EFI_SUCCESS) { | |
1444 | efi_free_pool(*buffer); | |
1445 | *buffer = NULL; | |
1446 | } | |
1447 | ||
1448 | return ret; | |
1449 | } | |
1450 | ||
332468f7 HS |
1451 | /* |
1452 | * Load an EFI image into memory. | |
1453 | * | |
1454 | * This function implements the LoadImage service. | |
1455 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1456 | * for details. | |
1457 | * | |
1458 | * @boot_policy true for request originating from the boot manager | |
1459 | * @parent_image the calles's image handle | |
1460 | * @file_path the path of the image to load | |
1461 | * @source_buffer memory location from which the image is installed | |
1462 | * @source_size size of the memory area from which the image is | |
1463 | * installed | |
1464 | * @image_handle handle for the newly installed image | |
1465 | * @return status code | |
1466 | */ | |
bee91169 AG |
1467 | static efi_status_t EFIAPI efi_load_image(bool boot_policy, |
1468 | efi_handle_t parent_image, | |
1469 | struct efi_device_path *file_path, | |
1470 | void *source_buffer, | |
1471 | unsigned long source_size, | |
1472 | efi_handle_t *image_handle) | |
1473 | { | |
bee91169 AG |
1474 | struct efi_loaded_image *info; |
1475 | struct efi_object *obj; | |
b9b17598 | 1476 | efi_status_t ret; |
bee91169 | 1477 | |
476ed96e | 1478 | EFI_ENTRY("%d, %p, %pD, %p, %ld, %p", boot_policy, parent_image, |
bee91169 | 1479 | file_path, source_buffer, source_size, image_handle); |
838ee4b4 RC |
1480 | |
1481 | info = calloc(1, sizeof(*info)); | |
1482 | obj = calloc(1, sizeof(*obj)); | |
1483 | ||
1484 | if (!source_buffer) { | |
1485 | struct efi_device_path *dp, *fp; | |
838ee4b4 | 1486 | |
9975fe96 | 1487 | ret = efi_load_image_from_path(file_path, &source_buffer); |
b9b17598 HS |
1488 | if (ret != EFI_SUCCESS) |
1489 | goto failure; | |
838ee4b4 RC |
1490 | /* |
1491 | * split file_path which contains both the device and | |
1492 | * file parts: | |
1493 | */ | |
1494 | efi_dp_split_file_path(file_path, &dp, &fp); | |
b9b17598 HS |
1495 | ret = efi_setup_loaded_image(info, obj, dp, fp); |
1496 | if (ret != EFI_SUCCESS) | |
1497 | goto failure; | |
838ee4b4 RC |
1498 | } else { |
1499 | /* In this case, file_path is the "device" path, ie. | |
1500 | * something like a HARDWARE_DEVICE:MEMORY_MAPPED | |
1501 | */ | |
b9b17598 HS |
1502 | ret = efi_setup_loaded_image(info, obj, file_path, NULL); |
1503 | if (ret != EFI_SUCCESS) | |
1504 | goto failure; | |
838ee4b4 | 1505 | } |
bee91169 AG |
1506 | info->reserved = efi_load_pe(source_buffer, info); |
1507 | if (!info->reserved) { | |
b9b17598 HS |
1508 | ret = EFI_UNSUPPORTED; |
1509 | goto failure; | |
bee91169 | 1510 | } |
32fc2ac3 HS |
1511 | info->system_table = &systab; |
1512 | info->parent_handle = parent_image; | |
ea54ad59 | 1513 | *image_handle = obj->handle; |
bee91169 | 1514 | return EFI_EXIT(EFI_SUCCESS); |
b9b17598 HS |
1515 | failure: |
1516 | free(info); | |
1517 | efi_delete_handle(obj); | |
1518 | return EFI_EXIT(ret); | |
bee91169 AG |
1519 | } |
1520 | ||
332468f7 HS |
1521 | /* |
1522 | * Call the entry point of an image. | |
1523 | * | |
1524 | * This function implements the StartImage service. | |
1525 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1526 | * for details. | |
1527 | * | |
1528 | * @image_handle handle of the image | |
1529 | * @exit_data_size size of the buffer | |
1530 | * @exit_data buffer to receive the exit data of the called image | |
10a08c4e | 1531 | * @return status code |
332468f7 | 1532 | */ |
bee91169 AG |
1533 | static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, |
1534 | unsigned long *exit_data_size, | |
1535 | s16 **exit_data) | |
1536 | { | |
5e55543e HS |
1537 | asmlinkage ulong (*entry)(efi_handle_t image_handle, |
1538 | struct efi_system_table *st); | |
bee91169 | 1539 | struct efi_loaded_image *info = image_handle; |
727a1afb | 1540 | efi_status_t ret; |
bee91169 AG |
1541 | |
1542 | EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data); | |
1543 | entry = info->reserved; | |
1544 | ||
1545 | efi_is_direct_boot = false; | |
1546 | ||
1547 | /* call the image! */ | |
a86aeaf2 | 1548 | if (setjmp(&info->exit_jmp)) { |
727a1afb HS |
1549 | /* |
1550 | * We called the entry point of the child image with EFI_CALL | |
1551 | * in the lines below. The child image called the Exit() boot | |
1552 | * service efi_exit() which executed the long jump that brought | |
1553 | * us to the current line. This implies that the second half | |
1554 | * of the EFI_CALL macro has not been executed. | |
1555 | */ | |
1556 | #ifdef CONFIG_ARM | |
1557 | /* | |
1558 | * efi_exit() called efi_restore_gd(). We have to undo this | |
1559 | * otherwise __efi_entry_check() will put the wrong value into | |
1560 | * app_gd. | |
1561 | */ | |
1562 | gd = app_gd; | |
1563 | #endif | |
1564 | /* | |
1565 | * To get ready to call EFI_EXIT below we have to execute the | |
1566 | * missed out steps of EFI_CALL. | |
1567 | */ | |
1568 | assert(__efi_entry_check()); | |
1569 | debug("%sEFI: %lu returned by started image\n", | |
1570 | __efi_nesting_dec(), | |
1571 | (unsigned long)((uintptr_t)info->exit_status & | |
1572 | ~EFI_ERROR_MASK)); | |
a86aeaf2 AG |
1573 | return EFI_EXIT(info->exit_status); |
1574 | } | |
1575 | ||
727a1afb | 1576 | ret = EFI_CALL(entry(image_handle, &systab)); |
bee91169 AG |
1577 | |
1578 | /* Should usually never get here */ | |
727a1afb | 1579 | return EFI_EXIT(ret); |
bee91169 AG |
1580 | } |
1581 | ||
332468f7 HS |
1582 | /* |
1583 | * Leave an EFI application or driver. | |
1584 | * | |
1585 | * This function implements the Exit service. | |
1586 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1587 | * for details. | |
1588 | * | |
1589 | * @image_handle handle of the application or driver that is exiting | |
1590 | * @exit_status status code | |
1591 | * @exit_data_size size of the buffer in bytes | |
1592 | * @exit_data buffer with data describing an error | |
10a08c4e | 1593 | * @return status code |
332468f7 | 1594 | */ |
a86aeaf2 AG |
1595 | static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle, |
1596 | efi_status_t exit_status, unsigned long exit_data_size, | |
1597 | int16_t *exit_data) | |
bee91169 | 1598 | { |
44549d62 HS |
1599 | /* |
1600 | * We require that the handle points to the original loaded | |
1601 | * image protocol interface. | |
1602 | * | |
1603 | * For getting the longjmp address this is safer than locating | |
1604 | * the protocol because the protocol may have been reinstalled | |
1605 | * pointing to another memory location. | |
1606 | * | |
1607 | * TODO: We should call the unload procedure of the loaded | |
1608 | * image protocol. | |
1609 | */ | |
a86aeaf2 AG |
1610 | struct efi_loaded_image *loaded_image_info = (void*)image_handle; |
1611 | ||
bee91169 AG |
1612 | EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status, |
1613 | exit_data_size, exit_data); | |
a86aeaf2 | 1614 | |
a148920e | 1615 | /* Make sure entry/exit counts for EFI world cross-overs match */ |
727a1afb | 1616 | EFI_EXIT(exit_status); |
da94073b | 1617 | |
a148920e AG |
1618 | /* |
1619 | * But longjmp out with the U-Boot gd, not the application's, as | |
1620 | * the other end is a setjmp call inside EFI context. | |
1621 | */ | |
1622 | efi_restore_gd(); | |
1623 | ||
a86aeaf2 | 1624 | loaded_image_info->exit_status = exit_status; |
692fcdd8 | 1625 | longjmp(&loaded_image_info->exit_jmp, 1); |
a86aeaf2 AG |
1626 | |
1627 | panic("EFI application exited"); | |
bee91169 AG |
1628 | } |
1629 | ||
332468f7 HS |
1630 | /* |
1631 | * Unload an EFI image. | |
1632 | * | |
1633 | * This function implements the UnloadImage service. | |
1634 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1635 | * for details. | |
1636 | * | |
1637 | * @image_handle handle of the image to be unloaded | |
1638 | * @return status code | |
1639 | */ | |
2074f700 | 1640 | static efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle) |
bee91169 AG |
1641 | { |
1642 | struct efi_object *efiobj; | |
1643 | ||
1644 | EFI_ENTRY("%p", image_handle); | |
1645 | efiobj = efi_search_obj(image_handle); | |
1646 | if (efiobj) | |
1647 | list_del(&efiobj->link); | |
1648 | ||
1649 | return EFI_EXIT(EFI_SUCCESS); | |
1650 | } | |
1651 | ||
332468f7 HS |
1652 | /* |
1653 | * Fix up caches for EFI payloads if necessary. | |
1654 | */ | |
bee91169 AG |
1655 | static void efi_exit_caches(void) |
1656 | { | |
1657 | #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64) | |
1658 | /* | |
1659 | * Grub on 32bit ARM needs to have caches disabled before jumping into | |
1660 | * a zImage, but does not know of all cache layers. Give it a hand. | |
1661 | */ | |
1662 | if (efi_is_direct_boot) | |
1663 | cleanup_before_linux(); | |
1664 | #endif | |
1665 | } | |
1666 | ||
332468f7 | 1667 | /* |
cc20ed03 | 1668 | * Stop all boot services. |
332468f7 HS |
1669 | * |
1670 | * This function implements the ExitBootServices service. | |
1671 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1672 | * for details. | |
1673 | * | |
cc20ed03 HS |
1674 | * All timer events are disabled. |
1675 | * For exit boot services events the notification function is called. | |
1676 | * The boot services are disabled in the system table. | |
1677 | * | |
332468f7 HS |
1678 | * @image_handle handle of the loaded image |
1679 | * @map_key key of the memory map | |
1680 | * @return status code | |
1681 | */ | |
2074f700 | 1682 | static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, |
bee91169 AG |
1683 | unsigned long map_key) |
1684 | { | |
152a263c HS |
1685 | int i; |
1686 | ||
bee91169 AG |
1687 | EFI_ENTRY("%p, %ld", image_handle, map_key); |
1688 | ||
cc20ed03 HS |
1689 | /* Make sure that notification functions are not called anymore */ |
1690 | efi_tpl = TPL_HIGH_LEVEL; | |
1691 | ||
1692 | /* Check if ExitBootServices has already been called */ | |
1693 | if (!systab.boottime) | |
1694 | return EFI_EXIT(EFI_SUCCESS); | |
1695 | ||
152a263c HS |
1696 | /* Notify that ExitBootServices is invoked. */ |
1697 | for (i = 0; i < ARRAY_SIZE(efi_events); ++i) { | |
1698 | if (efi_events[i].type != EVT_SIGNAL_EXIT_BOOT_SERVICES) | |
1699 | continue; | |
cc20ed03 HS |
1700 | efi_events[i].is_signaled = true; |
1701 | efi_signal_event(&efi_events[i], false); | |
152a263c | 1702 | } |
152a263c | 1703 | |
cc20ed03 | 1704 | /* TODO Should persist EFI variables here */ |
ad644e7c | 1705 | |
b7b8410a AG |
1706 | board_quiesce_devices(); |
1707 | ||
bee91169 AG |
1708 | /* Fix up caches for EFI payloads if necessary */ |
1709 | efi_exit_caches(); | |
1710 | ||
1711 | /* This stops all lingering devices */ | |
1712 | bootm_disable_interrupts(); | |
1713 | ||
cc20ed03 HS |
1714 | /* Disable boottime services */ |
1715 | systab.con_in_handle = NULL; | |
1716 | systab.con_in = NULL; | |
1717 | systab.con_out_handle = NULL; | |
1718 | systab.con_out = NULL; | |
1719 | systab.stderr_handle = NULL; | |
1720 | systab.std_err = NULL; | |
1721 | systab.boottime = NULL; | |
1722 | ||
1723 | /* Recalculate CRC32 */ | |
1724 | systab.hdr.crc32 = 0; | |
1725 | systab.hdr.crc32 = crc32(0, (const unsigned char *)&systab, | |
1726 | sizeof(struct efi_system_table)); | |
1727 | ||
bee91169 | 1728 | /* Give the payload some time to boot */ |
b3d60900 | 1729 | efi_set_watchdog(0); |
bee91169 AG |
1730 | WATCHDOG_RESET(); |
1731 | ||
1732 | return EFI_EXIT(EFI_SUCCESS); | |
1733 | } | |
1734 | ||
332468f7 HS |
1735 | /* |
1736 | * Get next value of the counter. | |
1737 | * | |
1738 | * This function implements the NextMonotonicCount service. | |
1739 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1740 | * for details. | |
1741 | * | |
1742 | * @count returned value of the counter | |
1743 | * @return status code | |
1744 | */ | |
bee91169 AG |
1745 | static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count) |
1746 | { | |
1747 | static uint64_t mono = 0; | |
1748 | EFI_ENTRY("%p", count); | |
1749 | *count = mono++; | |
1750 | return EFI_EXIT(EFI_SUCCESS); | |
1751 | } | |
1752 | ||
332468f7 HS |
1753 | /* |
1754 | * Sleep. | |
1755 | * | |
1756 | * This function implements the Stall sercive. | |
1757 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1758 | * for details. | |
1759 | * | |
1760 | * @microseconds period to sleep in microseconds | |
1761 | * @return status code | |
1762 | */ | |
bee91169 AG |
1763 | static efi_status_t EFIAPI efi_stall(unsigned long microseconds) |
1764 | { | |
1765 | EFI_ENTRY("%ld", microseconds); | |
1766 | udelay(microseconds); | |
1767 | return EFI_EXIT(EFI_SUCCESS); | |
1768 | } | |
1769 | ||
332468f7 HS |
1770 | /* |
1771 | * Reset the watchdog timer. | |
1772 | * | |
b3d60900 | 1773 | * This function implements the SetWatchdogTimer service. |
332468f7 HS |
1774 | * See the Unified Extensible Firmware Interface (UEFI) specification |
1775 | * for details. | |
1776 | * | |
1777 | * @timeout seconds before reset by watchdog | |
1778 | * @watchdog_code code to be logged when resetting | |
1779 | * @data_size size of buffer in bytes | |
1780 | * @watchdog_data buffer with data describing the reset reason | |
10a08c4e | 1781 | * @return status code |
332468f7 | 1782 | */ |
bee91169 AG |
1783 | static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout, |
1784 | uint64_t watchdog_code, | |
1785 | unsigned long data_size, | |
1786 | uint16_t *watchdog_data) | |
1787 | { | |
1788 | EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code, | |
1789 | data_size, watchdog_data); | |
b3d60900 | 1790 | return EFI_EXIT(efi_set_watchdog(timeout)); |
bee91169 AG |
1791 | } |
1792 | ||
332468f7 HS |
1793 | /* |
1794 | * Close a protocol. | |
1795 | * | |
1796 | * This function implements the CloseProtocol service. | |
1797 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1798 | * for details. | |
1799 | * | |
1800 | * @handle handle on which the protocol shall be closed | |
1801 | * @protocol GUID of the protocol to close | |
1802 | * @agent_handle handle of the driver | |
1803 | * @controller_handle handle of the controller | |
1804 | * @return status code | |
1805 | */ | |
2074f700 | 1806 | static efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle, |
5a9682d0 | 1807 | const efi_guid_t *protocol, |
2074f700 HS |
1808 | efi_handle_t agent_handle, |
1809 | efi_handle_t controller_handle) | |
bee91169 | 1810 | { |
3b8a489c HS |
1811 | struct efi_handler *handler; |
1812 | struct efi_open_protocol_info_item *item; | |
1813 | struct efi_open_protocol_info_item *pos; | |
1814 | efi_status_t r; | |
1815 | ||
778e6af8 | 1816 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle, |
bee91169 | 1817 | controller_handle); |
3b8a489c HS |
1818 | |
1819 | if (!agent_handle) { | |
1820 | r = EFI_INVALID_PARAMETER; | |
1821 | goto out; | |
1822 | } | |
1823 | r = efi_search_protocol(handle, protocol, &handler); | |
1824 | if (r != EFI_SUCCESS) | |
1825 | goto out; | |
1826 | ||
1827 | r = EFI_NOT_FOUND; | |
1828 | list_for_each_entry_safe(item, pos, &handler->open_infos, link) { | |
1829 | if (item->info.agent_handle == agent_handle && | |
1830 | item->info.controller_handle == controller_handle) { | |
1831 | efi_delete_open_info(item); | |
1832 | r = EFI_SUCCESS; | |
1833 | break; | |
1834 | } | |
1835 | } | |
1836 | out: | |
1837 | return EFI_EXIT(r); | |
bee91169 AG |
1838 | } |
1839 | ||
332468f7 HS |
1840 | /* |
1841 | * Provide information about then open status of a protocol on a handle | |
1842 | * | |
1843 | * This function implements the OpenProtocolInformation service. | |
1844 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1845 | * for details. | |
1846 | * | |
1847 | * @handle handle for which the information shall be retrieved | |
1848 | * @protocol GUID of the protocol | |
1849 | * @entry_buffer buffer to receive the open protocol information | |
1850 | * @entry_count number of entries available in the buffer | |
1851 | * @return status code | |
1852 | */ | |
bee91169 | 1853 | static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle, |
5a9682d0 | 1854 | const efi_guid_t *protocol, |
bee91169 | 1855 | struct efi_open_protocol_info_entry **entry_buffer, |
f5a2a938 | 1856 | efi_uintn_t *entry_count) |
bee91169 | 1857 | { |
e3fbbc36 HS |
1858 | unsigned long buffer_size; |
1859 | unsigned long count; | |
1860 | struct efi_handler *handler; | |
1861 | struct efi_open_protocol_info_item *item; | |
1862 | efi_status_t r; | |
1863 | ||
778e6af8 | 1864 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer, |
bee91169 | 1865 | entry_count); |
e3fbbc36 HS |
1866 | |
1867 | /* Check parameters */ | |
1868 | if (!entry_buffer) { | |
1869 | r = EFI_INVALID_PARAMETER; | |
1870 | goto out; | |
1871 | } | |
1872 | r = efi_search_protocol(handle, protocol, &handler); | |
1873 | if (r != EFI_SUCCESS) | |
1874 | goto out; | |
1875 | ||
1876 | /* Count entries */ | |
1877 | count = 0; | |
1878 | list_for_each_entry(item, &handler->open_infos, link) { | |
1879 | if (item->info.open_count) | |
1880 | ++count; | |
1881 | } | |
1882 | *entry_count = count; | |
1883 | *entry_buffer = NULL; | |
1884 | if (!count) { | |
1885 | r = EFI_SUCCESS; | |
1886 | goto out; | |
1887 | } | |
1888 | ||
1889 | /* Copy entries */ | |
1890 | buffer_size = count * sizeof(struct efi_open_protocol_info_entry); | |
1891 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
1892 | (void **)entry_buffer); | |
1893 | if (r != EFI_SUCCESS) | |
1894 | goto out; | |
1895 | list_for_each_entry_reverse(item, &handler->open_infos, link) { | |
1896 | if (item->info.open_count) | |
1897 | (*entry_buffer)[--count] = item->info; | |
1898 | } | |
1899 | out: | |
1900 | return EFI_EXIT(r); | |
bee91169 AG |
1901 | } |
1902 | ||
332468f7 HS |
1903 | /* |
1904 | * Get protocols installed on a handle. | |
1905 | * | |
1906 | * This function implements the ProtocolsPerHandleService. | |
1907 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1908 | * for details. | |
1909 | * | |
1910 | * @handle handle for which the information is retrieved | |
1911 | * @protocol_buffer buffer with protocol GUIDs | |
1912 | * @protocol_buffer_count number of entries in the buffer | |
10a08c4e | 1913 | * @return status code |
332468f7 | 1914 | */ |
2074f700 HS |
1915 | static efi_status_t EFIAPI efi_protocols_per_handle( |
1916 | efi_handle_t handle, efi_guid_t ***protocol_buffer, | |
f5a2a938 | 1917 | efi_uintn_t *protocol_buffer_count) |
bee91169 | 1918 | { |
c0ebfc86 | 1919 | unsigned long buffer_size; |
1920 | struct efi_object *efiobj; | |
69fb6b1a | 1921 | struct list_head *protocol_handle; |
c0ebfc86 | 1922 | efi_status_t r; |
1923 | ||
bee91169 AG |
1924 | EFI_ENTRY("%p, %p, %p", handle, protocol_buffer, |
1925 | protocol_buffer_count); | |
c0ebfc86 | 1926 | |
1927 | if (!handle || !protocol_buffer || !protocol_buffer_count) | |
1928 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
1929 | ||
1930 | *protocol_buffer = NULL; | |
661c8327 | 1931 | *protocol_buffer_count = 0; |
c0ebfc86 | 1932 | |
69fb6b1a HS |
1933 | efiobj = efi_search_obj(handle); |
1934 | if (!efiobj) | |
1935 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
c0ebfc86 | 1936 | |
69fb6b1a HS |
1937 | /* Count protocols */ |
1938 | list_for_each(protocol_handle, &efiobj->protocols) { | |
1939 | ++*protocol_buffer_count; | |
1940 | } | |
1941 | ||
1942 | /* Copy guids */ | |
1943 | if (*protocol_buffer_count) { | |
1944 | size_t j = 0; | |
1945 | ||
1946 | buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count; | |
1947 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
1948 | (void **)protocol_buffer); | |
1949 | if (r != EFI_SUCCESS) | |
1950 | return EFI_EXIT(r); | |
1951 | list_for_each(protocol_handle, &efiobj->protocols) { | |
1952 | struct efi_handler *protocol; | |
1953 | ||
1954 | protocol = list_entry(protocol_handle, | |
1955 | struct efi_handler, link); | |
1956 | (*protocol_buffer)[j] = (void *)protocol->guid; | |
1957 | ++j; | |
c0ebfc86 | 1958 | } |
c0ebfc86 | 1959 | } |
1960 | ||
1961 | return EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
1962 | } |
1963 | ||
332468f7 HS |
1964 | /* |
1965 | * Locate handles implementing a protocol. | |
1966 | * | |
1967 | * This function implements the LocateHandleBuffer service. | |
1968 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1969 | * for details. | |
1970 | * | |
1971 | * @search_type selection criterion | |
1972 | * @protocol GUID of the protocol | |
1973 | * @search_key registration key | |
1974 | * @no_handles number of returned handles | |
1975 | * @buffer buffer with the returned handles | |
1976 | * @return status code | |
1977 | */ | |
bee91169 AG |
1978 | static efi_status_t EFIAPI efi_locate_handle_buffer( |
1979 | enum efi_locate_search_type search_type, | |
5a9682d0 | 1980 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 1981 | efi_uintn_t *no_handles, efi_handle_t **buffer) |
bee91169 | 1982 | { |
c2e703f9 | 1983 | efi_status_t r; |
f5a2a938 | 1984 | efi_uintn_t buffer_size = 0; |
c2e703f9 | 1985 | |
778e6af8 | 1986 | EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, |
bee91169 | 1987 | no_handles, buffer); |
c2e703f9 | 1988 | |
1989 | if (!no_handles || !buffer) { | |
1990 | r = EFI_INVALID_PARAMETER; | |
1991 | goto out; | |
1992 | } | |
1993 | *no_handles = 0; | |
1994 | *buffer = NULL; | |
1995 | r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, | |
1996 | *buffer); | |
1997 | if (r != EFI_BUFFER_TOO_SMALL) | |
1998 | goto out; | |
1999 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
2000 | (void **)buffer); | |
2001 | if (r != EFI_SUCCESS) | |
2002 | goto out; | |
2003 | r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, | |
2004 | *buffer); | |
2005 | if (r == EFI_SUCCESS) | |
2074f700 | 2006 | *no_handles = buffer_size / sizeof(efi_handle_t); |
c2e703f9 | 2007 | out: |
2008 | return EFI_EXIT(r); | |
bee91169 AG |
2009 | } |
2010 | ||
332468f7 HS |
2011 | /* |
2012 | * Find an interface implementing a protocol. | |
2013 | * | |
2014 | * This function implements the LocateProtocol service. | |
2015 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2016 | * for details. | |
2017 | * | |
2018 | * @protocol GUID of the protocol | |
2019 | * @registration registration key passed to the notification function | |
2020 | * @protocol_interface interface implementing the protocol | |
10a08c4e | 2021 | * @return status code |
332468f7 | 2022 | */ |
5a9682d0 | 2023 | static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol, |
bee91169 AG |
2024 | void *registration, |
2025 | void **protocol_interface) | |
2026 | { | |
88adae5e | 2027 | struct list_head *lhandle; |
9172cd91 | 2028 | efi_status_t ret; |
bee91169 | 2029 | |
778e6af8 | 2030 | EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface); |
88adae5e | 2031 | |
2032 | if (!protocol || !protocol_interface) | |
2033 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2034 | ||
2035 | list_for_each(lhandle, &efi_obj_list) { | |
2036 | struct efi_object *efiobj; | |
9172cd91 | 2037 | struct efi_handler *handler; |
88adae5e | 2038 | |
2039 | efiobj = list_entry(lhandle, struct efi_object, link); | |
9172cd91 HS |
2040 | |
2041 | ret = efi_search_protocol(efiobj->handle, protocol, &handler); | |
2042 | if (ret == EFI_SUCCESS) { | |
2043 | *protocol_interface = handler->protocol_interface; | |
2044 | return EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
2045 | } |
2046 | } | |
88adae5e | 2047 | *protocol_interface = NULL; |
bee91169 AG |
2048 | |
2049 | return EFI_EXIT(EFI_NOT_FOUND); | |
2050 | } | |
2051 | ||
ae2c85c1 HS |
2052 | /* |
2053 | * Get the device path and handle of an device implementing a protocol. | |
2054 | * | |
2055 | * This function implements the LocateDevicePath service. | |
2056 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2057 | * for details. | |
2058 | * | |
2059 | * @protocol GUID of the protocol | |
2060 | * @device_path device path | |
2061 | * @device handle of the device | |
2062 | * @return status code | |
2063 | */ | |
2064 | static efi_status_t EFIAPI efi_locate_device_path( | |
2065 | const efi_guid_t *protocol, | |
2066 | struct efi_device_path **device_path, | |
2067 | efi_handle_t *device) | |
2068 | { | |
2069 | struct efi_device_path *dp; | |
2070 | size_t i; | |
2071 | struct efi_handler *handler; | |
2072 | efi_handle_t *handles; | |
2073 | size_t len, len_dp; | |
2074 | size_t len_best = 0; | |
2075 | efi_uintn_t no_handles; | |
2076 | u8 *remainder; | |
2077 | efi_status_t ret; | |
2078 | ||
2079 | EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device); | |
2080 | ||
2081 | if (!protocol || !device_path || !*device_path || !device) { | |
2082 | ret = EFI_INVALID_PARAMETER; | |
2083 | goto out; | |
2084 | } | |
2085 | ||
2086 | /* Find end of device path */ | |
2087 | len = efi_dp_size(*device_path); | |
2088 | ||
2089 | /* Get all handles implementing the protocol */ | |
2090 | ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL, | |
2091 | &no_handles, &handles)); | |
2092 | if (ret != EFI_SUCCESS) | |
2093 | goto out; | |
2094 | ||
2095 | for (i = 0; i < no_handles; ++i) { | |
2096 | /* Find the device path protocol */ | |
2097 | ret = efi_search_protocol(handles[i], &efi_guid_device_path, | |
2098 | &handler); | |
2099 | if (ret != EFI_SUCCESS) | |
2100 | continue; | |
2101 | dp = (struct efi_device_path *)handler->protocol_interface; | |
2102 | len_dp = efi_dp_size(dp); | |
2103 | /* | |
2104 | * This handle can only be a better fit | |
2105 | * if its device path length is longer than the best fit and | |
2106 | * if its device path length is shorter of equal the searched | |
2107 | * device path. | |
2108 | */ | |
2109 | if (len_dp <= len_best || len_dp > len) | |
2110 | continue; | |
2111 | /* Check if dp is a subpath of device_path */ | |
2112 | if (memcmp(*device_path, dp, len_dp)) | |
2113 | continue; | |
2114 | *device = handles[i]; | |
2115 | len_best = len_dp; | |
2116 | } | |
2117 | if (len_best) { | |
2118 | remainder = (u8 *)*device_path + len_best; | |
2119 | *device_path = (struct efi_device_path *)remainder; | |
2120 | ret = EFI_SUCCESS; | |
2121 | } else { | |
2122 | ret = EFI_NOT_FOUND; | |
2123 | } | |
2124 | out: | |
2125 | return EFI_EXIT(ret); | |
2126 | } | |
2127 | ||
332468f7 HS |
2128 | /* |
2129 | * Install multiple protocol interfaces. | |
2130 | * | |
2131 | * This function implements the MultipleProtocolInterfaces service. | |
2132 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2133 | * for details. | |
2134 | * | |
2135 | * @handle handle on which the protocol interfaces shall be installed | |
2136 | * @... NULL terminated argument list with pairs of protocol GUIDS and | |
2137 | * interfaces | |
2138 | * @return status code | |
2139 | */ | |
bee91169 AG |
2140 | static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces( |
2141 | void **handle, ...) | |
2142 | { | |
2143 | EFI_ENTRY("%p", handle); | |
58b83586 | 2144 | |
2145 | va_list argptr; | |
5a9682d0 | 2146 | const efi_guid_t *protocol; |
58b83586 | 2147 | void *protocol_interface; |
2148 | efi_status_t r = EFI_SUCCESS; | |
2149 | int i = 0; | |
2150 | ||
2151 | if (!handle) | |
2152 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2153 | ||
2154 | va_start(argptr, handle); | |
2155 | for (;;) { | |
2156 | protocol = va_arg(argptr, efi_guid_t*); | |
2157 | if (!protocol) | |
2158 | break; | |
2159 | protocol_interface = va_arg(argptr, void*); | |
1760ef57 HS |
2160 | r = EFI_CALL(efi_install_protocol_interface( |
2161 | handle, protocol, | |
2162 | EFI_NATIVE_INTERFACE, | |
2163 | protocol_interface)); | |
58b83586 | 2164 | if (r != EFI_SUCCESS) |
2165 | break; | |
2166 | i++; | |
2167 | } | |
2168 | va_end(argptr); | |
2169 | if (r == EFI_SUCCESS) | |
2170 | return EFI_EXIT(r); | |
2171 | ||
62471e46 | 2172 | /* If an error occurred undo all changes. */ |
58b83586 | 2173 | va_start(argptr, handle); |
2174 | for (; i; --i) { | |
2175 | protocol = va_arg(argptr, efi_guid_t*); | |
2176 | protocol_interface = va_arg(argptr, void*); | |
cd534083 HS |
2177 | EFI_CALL(efi_uninstall_protocol_interface(handle, protocol, |
2178 | protocol_interface)); | |
58b83586 | 2179 | } |
2180 | va_end(argptr); | |
2181 | ||
2182 | return EFI_EXIT(r); | |
bee91169 AG |
2183 | } |
2184 | ||
332468f7 HS |
2185 | /* |
2186 | * Uninstall multiple protocol interfaces. | |
2187 | * | |
2188 | * This function implements the UninstallMultipleProtocolInterfaces service. | |
2189 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2190 | * for details. | |
2191 | * | |
2192 | * @handle handle from which the protocol interfaces shall be removed | |
2193 | * @... NULL terminated argument list with pairs of protocol GUIDS and | |
2194 | * interfaces | |
2195 | * @return status code | |
2196 | */ | |
bee91169 AG |
2197 | static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces( |
2198 | void *handle, ...) | |
2199 | { | |
2200 | EFI_ENTRY("%p", handle); | |
843ce54c HS |
2201 | |
2202 | va_list argptr; | |
2203 | const efi_guid_t *protocol; | |
2204 | void *protocol_interface; | |
2205 | efi_status_t r = EFI_SUCCESS; | |
2206 | size_t i = 0; | |
2207 | ||
2208 | if (!handle) | |
2209 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2210 | ||
2211 | va_start(argptr, handle); | |
2212 | for (;;) { | |
2213 | protocol = va_arg(argptr, efi_guid_t*); | |
2214 | if (!protocol) | |
2215 | break; | |
2216 | protocol_interface = va_arg(argptr, void*); | |
2217 | r = EFI_CALL(efi_uninstall_protocol_interface( | |
2218 | handle, protocol, | |
2219 | protocol_interface)); | |
2220 | if (r != EFI_SUCCESS) | |
2221 | break; | |
2222 | i++; | |
2223 | } | |
2224 | va_end(argptr); | |
2225 | if (r == EFI_SUCCESS) | |
2226 | return EFI_EXIT(r); | |
2227 | ||
2228 | /* If an error occurred undo all changes. */ | |
2229 | va_start(argptr, handle); | |
2230 | for (; i; --i) { | |
2231 | protocol = va_arg(argptr, efi_guid_t*); | |
2232 | protocol_interface = va_arg(argptr, void*); | |
2233 | EFI_CALL(efi_install_protocol_interface(&handle, protocol, | |
2234 | EFI_NATIVE_INTERFACE, | |
2235 | protocol_interface)); | |
2236 | } | |
2237 | va_end(argptr); | |
2238 | ||
2239 | return EFI_EXIT(r); | |
bee91169 AG |
2240 | } |
2241 | ||
332468f7 HS |
2242 | /* |
2243 | * Calculate cyclic redundancy code. | |
2244 | * | |
2245 | * This function implements the CalculateCrc32 service. | |
2246 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2247 | * for details. | |
2248 | * | |
2249 | * @data buffer with data | |
2250 | * @data_size size of buffer in bytes | |
2251 | * @crc32_p cyclic redundancy code | |
2252 | * @return status code | |
2253 | */ | |
bee91169 AG |
2254 | static efi_status_t EFIAPI efi_calculate_crc32(void *data, |
2255 | unsigned long data_size, | |
2256 | uint32_t *crc32_p) | |
2257 | { | |
2258 | EFI_ENTRY("%p, %ld", data, data_size); | |
2259 | *crc32_p = crc32(0, data, data_size); | |
2260 | return EFI_EXIT(EFI_SUCCESS); | |
2261 | } | |
2262 | ||
332468f7 HS |
2263 | /* |
2264 | * Copy memory. | |
2265 | * | |
2266 | * This function implements the CopyMem service. | |
2267 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2268 | * for details. | |
2269 | * | |
2270 | * @destination destination of the copy operation | |
2271 | * @source source of the copy operation | |
2272 | * @length number of bytes to copy | |
2273 | */ | |
fc05a959 HS |
2274 | static void EFIAPI efi_copy_mem(void *destination, const void *source, |
2275 | size_t length) | |
bee91169 | 2276 | { |
fc05a959 | 2277 | EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length); |
bee91169 | 2278 | memcpy(destination, source, length); |
f7c78176 | 2279 | EFI_EXIT(EFI_SUCCESS); |
bee91169 AG |
2280 | } |
2281 | ||
332468f7 HS |
2282 | /* |
2283 | * Fill memory with a byte value. | |
2284 | * | |
2285 | * This function implements the SetMem service. | |
2286 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2287 | * for details. | |
2288 | * | |
2289 | * @buffer buffer to fill | |
2290 | * @size size of buffer in bytes | |
2291 | * @value byte to copy to the buffer | |
2292 | */ | |
fc05a959 | 2293 | static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value) |
bee91169 | 2294 | { |
fc05a959 | 2295 | EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value); |
bee91169 | 2296 | memset(buffer, value, size); |
f7c78176 | 2297 | EFI_EXIT(EFI_SUCCESS); |
bee91169 AG |
2298 | } |
2299 | ||
191a41cc HS |
2300 | /* |
2301 | * Open protocol interface on a handle. | |
2302 | * | |
2303 | * @handler handler of a protocol | |
2304 | * @protocol_interface interface implementing the protocol | |
2305 | * @agent_handle handle of the driver | |
2306 | * @controller_handle handle of the controller | |
2307 | * @attributes attributes indicating how to open the protocol | |
2308 | * @return status code | |
2309 | */ | |
2310 | static efi_status_t efi_protocol_open( | |
2311 | struct efi_handler *handler, | |
2312 | void **protocol_interface, void *agent_handle, | |
2313 | void *controller_handle, uint32_t attributes) | |
2314 | { | |
2315 | struct efi_open_protocol_info_item *item; | |
2316 | struct efi_open_protocol_info_entry *match = NULL; | |
2317 | bool opened_by_driver = false; | |
2318 | bool opened_exclusive = false; | |
2319 | ||
2320 | /* If there is no agent, only return the interface */ | |
2321 | if (!agent_handle) | |
2322 | goto out; | |
2323 | ||
2324 | /* For TEST_PROTOCOL ignore interface attribute */ | |
2325 | if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
2326 | *protocol_interface = NULL; | |
2327 | ||
2328 | /* | |
2329 | * Check if the protocol is already opened by a driver with the same | |
2330 | * attributes or opened exclusively | |
2331 | */ | |
2332 | list_for_each_entry(item, &handler->open_infos, link) { | |
2333 | if (item->info.agent_handle == agent_handle) { | |
2334 | if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) && | |
2335 | (item->info.attributes == attributes)) | |
2336 | return EFI_ALREADY_STARTED; | |
2337 | } | |
2338 | if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) | |
2339 | opened_exclusive = true; | |
2340 | } | |
2341 | ||
2342 | /* Only one controller can open the protocol exclusively */ | |
2343 | if (opened_exclusive && attributes & | |
2344 | (EFI_OPEN_PROTOCOL_EXCLUSIVE | EFI_OPEN_PROTOCOL_BY_DRIVER)) | |
2345 | return EFI_ACCESS_DENIED; | |
2346 | ||
2347 | /* Prepare exclusive opening */ | |
2348 | if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) { | |
2349 | /* Try to disconnect controllers */ | |
2350 | list_for_each_entry(item, &handler->open_infos, link) { | |
2351 | if (item->info.attributes == | |
2352 | EFI_OPEN_PROTOCOL_BY_DRIVER) | |
2353 | EFI_CALL(efi_disconnect_controller( | |
2354 | item->info.controller_handle, | |
2355 | item->info.agent_handle, | |
2356 | NULL)); | |
2357 | } | |
2358 | opened_by_driver = false; | |
2359 | /* Check if all controllers are disconnected */ | |
2360 | list_for_each_entry(item, &handler->open_infos, link) { | |
2361 | if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) | |
2362 | opened_by_driver = true; | |
2363 | } | |
2364 | /* Only one controller can be conncected */ | |
2365 | if (opened_by_driver) | |
2366 | return EFI_ACCESS_DENIED; | |
2367 | } | |
2368 | ||
2369 | /* Find existing entry */ | |
2370 | list_for_each_entry(item, &handler->open_infos, link) { | |
2371 | if (item->info.agent_handle == agent_handle && | |
2372 | item->info.controller_handle == controller_handle) | |
2373 | match = &item->info; | |
2374 | } | |
2375 | /* None found, create one */ | |
2376 | if (!match) { | |
2377 | match = efi_create_open_info(handler); | |
2378 | if (!match) | |
2379 | return EFI_OUT_OF_RESOURCES; | |
2380 | } | |
2381 | ||
2382 | match->agent_handle = agent_handle; | |
2383 | match->controller_handle = controller_handle; | |
2384 | match->attributes = attributes; | |
2385 | match->open_count++; | |
2386 | ||
2387 | out: | |
2388 | /* For TEST_PROTOCOL ignore interface attribute. */ | |
2389 | if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
2390 | *protocol_interface = handler->protocol_interface; | |
2391 | ||
2392 | return EFI_SUCCESS; | |
2393 | } | |
2394 | ||
332468f7 HS |
2395 | /* |
2396 | * Open protocol interface on a handle. | |
2397 | * | |
2398 | * This function implements the OpenProtocol interface. | |
2399 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2400 | * for details. | |
2401 | * | |
2402 | * @handle handle on which the protocol shall be opened | |
2403 | * @protocol GUID of the protocol | |
2404 | * @protocol_interface interface implementing the protocol | |
2405 | * @agent_handle handle of the driver | |
2406 | * @controller_handle handle of the controller | |
2407 | * @attributes attributes indicating how to open the protocol | |
2408 | * @return status code | |
2409 | */ | |
bee91169 | 2410 | static efi_status_t EFIAPI efi_open_protocol( |
5a9682d0 | 2411 | void *handle, const efi_guid_t *protocol, |
bee91169 AG |
2412 | void **protocol_interface, void *agent_handle, |
2413 | void *controller_handle, uint32_t attributes) | |
2414 | { | |
80286e8f | 2415 | struct efi_handler *handler; |
69baec67 | 2416 | efi_status_t r = EFI_INVALID_PARAMETER; |
bee91169 | 2417 | |
778e6af8 | 2418 | EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol, |
bee91169 AG |
2419 | protocol_interface, agent_handle, controller_handle, |
2420 | attributes); | |
b5349f74 | 2421 | |
69baec67 | 2422 | if (!handle || !protocol || |
2423 | (!protocol_interface && attributes != | |
2424 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) { | |
2425 | goto out; | |
2426 | } | |
2427 | ||
2428 | switch (attributes) { | |
2429 | case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL: | |
2430 | case EFI_OPEN_PROTOCOL_GET_PROTOCOL: | |
2431 | case EFI_OPEN_PROTOCOL_TEST_PROTOCOL: | |
2432 | break; | |
2433 | case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER: | |
2434 | if (controller_handle == handle) | |
2435 | goto out; | |
191a41cc | 2436 | /* fall-through */ |
69baec67 | 2437 | case EFI_OPEN_PROTOCOL_BY_DRIVER: |
2438 | case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE: | |
191a41cc HS |
2439 | /* Check that the controller handle is valid */ |
2440 | if (!efi_search_obj(controller_handle)) | |
69baec67 | 2441 | goto out; |
191a41cc | 2442 | /* fall-through */ |
69baec67 | 2443 | case EFI_OPEN_PROTOCOL_EXCLUSIVE: |
191a41cc HS |
2444 | /* Check that the agent handle is valid */ |
2445 | if (!efi_search_obj(agent_handle)) | |
69baec67 | 2446 | goto out; |
2447 | break; | |
2448 | default: | |
b5349f74 | 2449 | goto out; |
2450 | } | |
2451 | ||
80286e8f HS |
2452 | r = efi_search_protocol(handle, protocol, &handler); |
2453 | if (r != EFI_SUCCESS) | |
2454 | goto out; | |
bee91169 | 2455 | |
191a41cc HS |
2456 | r = efi_protocol_open(handler, protocol_interface, agent_handle, |
2457 | controller_handle, attributes); | |
bee91169 AG |
2458 | out: |
2459 | return EFI_EXIT(r); | |
2460 | } | |
2461 | ||
332468f7 HS |
2462 | /* |
2463 | * Get interface of a protocol on a handle. | |
2464 | * | |
2465 | * This function implements the HandleProtocol service. | |
2466 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2467 | * for details. | |
2468 | * | |
2469 | * @handle handle on which the protocol shall be opened | |
2470 | * @protocol GUID of the protocol | |
2471 | * @protocol_interface interface implementing the protocol | |
2472 | * @return status code | |
2473 | */ | |
2074f700 | 2474 | static efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle, |
5a9682d0 | 2475 | const efi_guid_t *protocol, |
bee91169 AG |
2476 | void **protocol_interface) |
2477 | { | |
8e1d329f | 2478 | return efi_open_protocol(handle, protocol, protocol_interface, NULL, |
2479 | NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL); | |
bee91169 AG |
2480 | } |
2481 | ||
f0959dbe HS |
2482 | static efi_status_t efi_bind_controller( |
2483 | efi_handle_t controller_handle, | |
2484 | efi_handle_t driver_image_handle, | |
2485 | struct efi_device_path *remain_device_path) | |
2486 | { | |
2487 | struct efi_driver_binding_protocol *binding_protocol; | |
2488 | efi_status_t r; | |
2489 | ||
2490 | r = EFI_CALL(efi_open_protocol(driver_image_handle, | |
2491 | &efi_guid_driver_binding_protocol, | |
2492 | (void **)&binding_protocol, | |
2493 | driver_image_handle, NULL, | |
2494 | EFI_OPEN_PROTOCOL_GET_PROTOCOL)); | |
2495 | if (r != EFI_SUCCESS) | |
2496 | return r; | |
2497 | r = EFI_CALL(binding_protocol->supported(binding_protocol, | |
2498 | controller_handle, | |
2499 | remain_device_path)); | |
2500 | if (r == EFI_SUCCESS) | |
2501 | r = EFI_CALL(binding_protocol->start(binding_protocol, | |
2502 | controller_handle, | |
2503 | remain_device_path)); | |
2504 | EFI_CALL(efi_close_protocol(driver_image_handle, | |
2505 | &efi_guid_driver_binding_protocol, | |
2506 | driver_image_handle, NULL)); | |
2507 | return r; | |
2508 | } | |
2509 | ||
2510 | static efi_status_t efi_connect_single_controller( | |
2511 | efi_handle_t controller_handle, | |
2512 | efi_handle_t *driver_image_handle, | |
2513 | struct efi_device_path *remain_device_path) | |
2514 | { | |
2515 | efi_handle_t *buffer; | |
2516 | size_t count; | |
2517 | size_t i; | |
2518 | efi_status_t r; | |
2519 | size_t connected = 0; | |
2520 | ||
2521 | /* Get buffer with all handles with driver binding protocol */ | |
2522 | r = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, | |
2523 | &efi_guid_driver_binding_protocol, | |
2524 | NULL, &count, &buffer)); | |
2525 | if (r != EFI_SUCCESS) | |
2526 | return r; | |
2527 | ||
2528 | /* Context Override */ | |
2529 | if (driver_image_handle) { | |
2530 | for (; *driver_image_handle; ++driver_image_handle) { | |
2531 | for (i = 0; i < count; ++i) { | |
2532 | if (buffer[i] == *driver_image_handle) { | |
2533 | buffer[i] = NULL; | |
2534 | r = efi_bind_controller( | |
2535 | controller_handle, | |
2536 | *driver_image_handle, | |
2537 | remain_device_path); | |
2538 | /* | |
2539 | * For drivers that do not support the | |
2540 | * controller or are already connected | |
2541 | * we receive an error code here. | |
2542 | */ | |
2543 | if (r == EFI_SUCCESS) | |
2544 | ++connected; | |
2545 | } | |
2546 | } | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | /* | |
2551 | * TODO: Some overrides are not yet implemented: | |
2552 | * - Platform Driver Override | |
2553 | * - Driver Family Override Search | |
2554 | * - Bus Specific Driver Override | |
2555 | */ | |
2556 | ||
2557 | /* Driver Binding Search */ | |
2558 | for (i = 0; i < count; ++i) { | |
2559 | if (buffer[i]) { | |
2560 | r = efi_bind_controller(controller_handle, | |
2561 | buffer[i], | |
2562 | remain_device_path); | |
2563 | if (r == EFI_SUCCESS) | |
2564 | ++connected; | |
2565 | } | |
2566 | } | |
2567 | ||
2568 | efi_free_pool(buffer); | |
2569 | if (!connected) | |
2570 | return EFI_NOT_FOUND; | |
2571 | return EFI_SUCCESS; | |
2572 | } | |
2573 | ||
2574 | /* | |
2575 | * Connect a controller to a driver. | |
2576 | * | |
2577 | * This function implements the ConnectController service. | |
2578 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2579 | * for details. | |
2580 | * | |
2581 | * First all driver binding protocol handles are tried for binding drivers. | |
2582 | * Afterwards all handles that have openened a protocol of the controller | |
2583 | * with EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER are connected to drivers. | |
2584 | * | |
2585 | * @controller_handle handle of the controller | |
2586 | * @driver_image_handle handle of the driver | |
2587 | * @remain_device_path device path of a child controller | |
2588 | * @recursive true to connect all child controllers | |
2589 | * @return status code | |
2590 | */ | |
2591 | static efi_status_t EFIAPI efi_connect_controller( | |
2592 | efi_handle_t controller_handle, | |
2593 | efi_handle_t *driver_image_handle, | |
2594 | struct efi_device_path *remain_device_path, | |
2595 | bool recursive) | |
2596 | { | |
2597 | efi_status_t r; | |
2598 | efi_status_t ret = EFI_NOT_FOUND; | |
2599 | struct efi_object *efiobj; | |
2600 | ||
2601 | EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle, | |
2602 | remain_device_path, recursive); | |
2603 | ||
2604 | efiobj = efi_search_obj(controller_handle); | |
2605 | if (!efiobj) { | |
2606 | ret = EFI_INVALID_PARAMETER; | |
2607 | goto out; | |
2608 | } | |
2609 | ||
2610 | r = efi_connect_single_controller(controller_handle, | |
2611 | driver_image_handle, | |
2612 | remain_device_path); | |
2613 | if (r == EFI_SUCCESS) | |
2614 | ret = EFI_SUCCESS; | |
2615 | if (recursive) { | |
2616 | struct efi_handler *handler; | |
2617 | struct efi_open_protocol_info_item *item; | |
2618 | ||
2619 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2620 | list_for_each_entry(item, &handler->open_infos, link) { | |
2621 | if (item->info.attributes & | |
2622 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { | |
2623 | r = EFI_CALL(efi_connect_controller( | |
2624 | item->info.controller_handle, | |
2625 | driver_image_handle, | |
2626 | remain_device_path, | |
2627 | recursive)); | |
2628 | if (r == EFI_SUCCESS) | |
2629 | ret = EFI_SUCCESS; | |
2630 | } | |
2631 | } | |
2632 | } | |
2633 | } | |
2634 | /* Check for child controller specified by end node */ | |
2635 | if (ret != EFI_SUCCESS && remain_device_path && | |
2636 | remain_device_path->type == DEVICE_PATH_TYPE_END) | |
2637 | ret = EFI_SUCCESS; | |
2638 | out: | |
2639 | return EFI_EXIT(ret); | |
2640 | } | |
2641 | ||
3f9b0042 HS |
2642 | /* |
2643 | * Get all child controllers associated to a driver. | |
2644 | * The allocated buffer has to be freed with free(). | |
2645 | * | |
2646 | * @efiobj handle of the controller | |
2647 | * @driver_handle handle of the driver | |
2648 | * @number_of_children number of child controllers | |
2649 | * @child_handle_buffer handles of the the child controllers | |
2650 | */ | |
2651 | static efi_status_t efi_get_child_controllers( | |
2652 | struct efi_object *efiobj, | |
2653 | efi_handle_t driver_handle, | |
2654 | efi_uintn_t *number_of_children, | |
2655 | efi_handle_t **child_handle_buffer) | |
2656 | { | |
2657 | struct efi_handler *handler; | |
2658 | struct efi_open_protocol_info_item *item; | |
2659 | efi_uintn_t count = 0, i; | |
2660 | bool duplicate; | |
2661 | ||
2662 | /* Count all child controller associations */ | |
2663 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2664 | list_for_each_entry(item, &handler->open_infos, link) { | |
2665 | if (item->info.agent_handle == driver_handle && | |
2666 | item->info.attributes & | |
2667 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) | |
2668 | ++count; | |
2669 | } | |
2670 | } | |
2671 | /* | |
2672 | * Create buffer. In case of duplicate child controller assignments | |
2673 | * the buffer will be too large. But that does not harm. | |
2674 | */ | |
2675 | *number_of_children = 0; | |
2676 | *child_handle_buffer = calloc(count, sizeof(efi_handle_t)); | |
2677 | if (!*child_handle_buffer) | |
2678 | return EFI_OUT_OF_RESOURCES; | |
2679 | /* Copy unique child handles */ | |
2680 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2681 | list_for_each_entry(item, &handler->open_infos, link) { | |
2682 | if (item->info.agent_handle == driver_handle && | |
2683 | item->info.attributes & | |
2684 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { | |
2685 | /* Check this is a new child controller */ | |
2686 | duplicate = false; | |
2687 | for (i = 0; i < *number_of_children; ++i) { | |
2688 | if ((*child_handle_buffer)[i] == | |
2689 | item->info.controller_handle) | |
2690 | duplicate = true; | |
2691 | } | |
2692 | /* Copy handle to buffer */ | |
2693 | if (!duplicate) { | |
2694 | i = (*number_of_children)++; | |
2695 | (*child_handle_buffer)[i] = | |
2696 | item->info.controller_handle; | |
2697 | } | |
2698 | } | |
2699 | } | |
2700 | } | |
2701 | return EFI_SUCCESS; | |
2702 | } | |
2703 | ||
2704 | /* | |
2705 | * Disconnect a controller from a driver. | |
2706 | * | |
2707 | * This function implements the DisconnectController service. | |
2708 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2709 | * for details. | |
2710 | * | |
2711 | * @controller_handle handle of the controller | |
2712 | * @driver_image_handle handle of the driver | |
2713 | * @child_handle handle of the child to destroy | |
2714 | * @return status code | |
2715 | */ | |
2716 | static efi_status_t EFIAPI efi_disconnect_controller( | |
2717 | efi_handle_t controller_handle, | |
2718 | efi_handle_t driver_image_handle, | |
2719 | efi_handle_t child_handle) | |
2720 | { | |
2721 | struct efi_driver_binding_protocol *binding_protocol; | |
2722 | efi_handle_t *child_handle_buffer = NULL; | |
2723 | size_t number_of_children = 0; | |
2724 | efi_status_t r; | |
2725 | size_t stop_count = 0; | |
2726 | struct efi_object *efiobj; | |
2727 | ||
2728 | EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle, | |
2729 | child_handle); | |
2730 | ||
2731 | efiobj = efi_search_obj(controller_handle); | |
2732 | if (!efiobj) { | |
2733 | r = EFI_INVALID_PARAMETER; | |
2734 | goto out; | |
2735 | } | |
2736 | ||
2737 | if (child_handle && !efi_search_obj(child_handle)) { | |
2738 | r = EFI_INVALID_PARAMETER; | |
2739 | goto out; | |
2740 | } | |
2741 | ||
2742 | /* If no driver handle is supplied, disconnect all drivers */ | |
2743 | if (!driver_image_handle) { | |
2744 | r = efi_disconnect_all_drivers(efiobj, NULL, child_handle); | |
2745 | goto out; | |
2746 | } | |
2747 | ||
2748 | /* Create list of child handles */ | |
2749 | if (child_handle) { | |
2750 | number_of_children = 1; | |
2751 | child_handle_buffer = &child_handle; | |
2752 | } else { | |
2753 | efi_get_child_controllers(efiobj, | |
2754 | driver_image_handle, | |
2755 | &number_of_children, | |
2756 | &child_handle_buffer); | |
2757 | } | |
2758 | ||
2759 | /* Get the driver binding protocol */ | |
2760 | r = EFI_CALL(efi_open_protocol(driver_image_handle, | |
2761 | &efi_guid_driver_binding_protocol, | |
2762 | (void **)&binding_protocol, | |
2763 | driver_image_handle, NULL, | |
2764 | EFI_OPEN_PROTOCOL_GET_PROTOCOL)); | |
2765 | if (r != EFI_SUCCESS) | |
2766 | goto out; | |
2767 | /* Remove the children */ | |
2768 | if (number_of_children) { | |
2769 | r = EFI_CALL(binding_protocol->stop(binding_protocol, | |
2770 | controller_handle, | |
2771 | number_of_children, | |
2772 | child_handle_buffer)); | |
2773 | if (r == EFI_SUCCESS) | |
2774 | ++stop_count; | |
2775 | } | |
2776 | /* Remove the driver */ | |
2777 | if (!child_handle) | |
2778 | r = EFI_CALL(binding_protocol->stop(binding_protocol, | |
2779 | controller_handle, | |
2780 | 0, NULL)); | |
2781 | if (r == EFI_SUCCESS) | |
2782 | ++stop_count; | |
2783 | EFI_CALL(efi_close_protocol(driver_image_handle, | |
2784 | &efi_guid_driver_binding_protocol, | |
2785 | driver_image_handle, NULL)); | |
2786 | ||
2787 | if (stop_count) | |
2788 | r = EFI_SUCCESS; | |
2789 | else | |
2790 | r = EFI_NOT_FOUND; | |
2791 | out: | |
2792 | if (!child_handle) | |
2793 | free(child_handle_buffer); | |
2794 | return EFI_EXIT(r); | |
2795 | } | |
2796 | ||
bee91169 AG |
2797 | static const struct efi_boot_services efi_boot_services = { |
2798 | .hdr = { | |
2799 | .headersize = sizeof(struct efi_table_hdr), | |
2800 | }, | |
2801 | .raise_tpl = efi_raise_tpl, | |
2802 | .restore_tpl = efi_restore_tpl, | |
2803 | .allocate_pages = efi_allocate_pages_ext, | |
2804 | .free_pages = efi_free_pages_ext, | |
2805 | .get_memory_map = efi_get_memory_map_ext, | |
ead1274b | 2806 | .allocate_pool = efi_allocate_pool_ext, |
42417bc8 | 2807 | .free_pool = efi_free_pool_ext, |
49deb455 | 2808 | .create_event = efi_create_event_ext, |
bfc72462 | 2809 | .set_timer = efi_set_timer_ext, |
bee91169 | 2810 | .wait_for_event = efi_wait_for_event, |
c6841592 | 2811 | .signal_event = efi_signal_event_ext, |
bee91169 AG |
2812 | .close_event = efi_close_event, |
2813 | .check_event = efi_check_event, | |
1760ef57 | 2814 | .install_protocol_interface = efi_install_protocol_interface, |
bee91169 | 2815 | .reinstall_protocol_interface = efi_reinstall_protocol_interface, |
cd534083 | 2816 | .uninstall_protocol_interface = efi_uninstall_protocol_interface, |
bee91169 AG |
2817 | .handle_protocol = efi_handle_protocol, |
2818 | .reserved = NULL, | |
2819 | .register_protocol_notify = efi_register_protocol_notify, | |
26329584 | 2820 | .locate_handle = efi_locate_handle_ext, |
bee91169 | 2821 | .locate_device_path = efi_locate_device_path, |
488bf12d | 2822 | .install_configuration_table = efi_install_configuration_table_ext, |
bee91169 AG |
2823 | .load_image = efi_load_image, |
2824 | .start_image = efi_start_image, | |
a86aeaf2 | 2825 | .exit = efi_exit, |
bee91169 AG |
2826 | .unload_image = efi_unload_image, |
2827 | .exit_boot_services = efi_exit_boot_services, | |
2828 | .get_next_monotonic_count = efi_get_next_monotonic_count, | |
2829 | .stall = efi_stall, | |
2830 | .set_watchdog_timer = efi_set_watchdog_timer, | |
2831 | .connect_controller = efi_connect_controller, | |
2832 | .disconnect_controller = efi_disconnect_controller, | |
2833 | .open_protocol = efi_open_protocol, | |
2834 | .close_protocol = efi_close_protocol, | |
2835 | .open_protocol_information = efi_open_protocol_information, | |
2836 | .protocols_per_handle = efi_protocols_per_handle, | |
2837 | .locate_handle_buffer = efi_locate_handle_buffer, | |
2838 | .locate_protocol = efi_locate_protocol, | |
2839 | .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces, | |
2840 | .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces, | |
2841 | .calculate_crc32 = efi_calculate_crc32, | |
2842 | .copy_mem = efi_copy_mem, | |
2843 | .set_mem = efi_set_mem, | |
2844 | }; | |
2845 | ||
2846 | ||
05b6f56e | 2847 | static uint16_t __efi_runtime_data firmware_vendor[] = L"Das U-Boot"; |
bee91169 | 2848 | |
3c63db9c | 2849 | struct efi_system_table __efi_runtime_data systab = { |
bee91169 AG |
2850 | .hdr = { |
2851 | .signature = EFI_SYSTEM_TABLE_SIGNATURE, | |
2852 | .revision = 0x20005, /* 2.5 */ | |
2853 | .headersize = sizeof(struct efi_table_hdr), | |
2854 | }, | |
2855 | .fw_vendor = (long)firmware_vendor, | |
2856 | .con_in = (void*)&efi_con_in, | |
2857 | .con_out = (void*)&efi_con_out, | |
2858 | .std_err = (void*)&efi_con_out, | |
2859 | .runtime = (void*)&efi_runtime_services, | |
2860 | .boottime = (void*)&efi_boot_services, | |
2861 | .nr_tables = 0, | |
2862 | .tables = (void*)efi_conf_table, | |
2863 | }; |