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f739fcd8 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
bee91169 AG |
2 | /* |
3 | * EFI application boot time services | |
4 | * | |
5 | * Copyright (c) 2016 Alexander Graf | |
bee91169 AG |
6 | */ |
7 | ||
bee91169 | 8 | #include <common.h> |
7d963323 | 9 | #include <div64.h> |
bee91169 | 10 | #include <efi_loader.h> |
ad644e7c | 11 | #include <environment.h> |
bee91169 | 12 | #include <malloc.h> |
b08c8c48 | 13 | #include <linux/libfdt_env.h> |
bee91169 AG |
14 | #include <u-boot/crc.h> |
15 | #include <bootm.h> | |
16 | #include <inttypes.h> | |
17 | #include <watchdog.h> | |
18 | ||
19 | DECLARE_GLOBAL_DATA_PTR; | |
20 | ||
32f4b2f8 | 21 | /* Task priority level */ |
152cade3 | 22 | static efi_uintn_t efi_tpl = TPL_APPLICATION; |
32f4b2f8 | 23 | |
bee91169 AG |
24 | /* This list contains all the EFI objects our payload has access to */ |
25 | LIST_HEAD(efi_obj_list); | |
26 | ||
43bce442 | 27 | /* List of all events */ |
b095f3c8 | 28 | LIST_HEAD(efi_events); |
43bce442 | 29 | |
bee91169 AG |
30 | /* |
31 | * If we're running on nasty systems (32bit ARM booting into non-EFI Linux) | |
32 | * we need to do trickery with caches. Since we don't want to break the EFI | |
33 | * aware boot path, only apply hacks when loading exiting directly (breaking | |
34 | * direct Linux EFI booting along the way - oh well). | |
35 | */ | |
36 | static bool efi_is_direct_boot = true; | |
37 | ||
38 | /* | |
39 | * EFI can pass arbitrary additional "tables" containing vendor specific | |
40 | * information to the payload. One such table is the FDT table which contains | |
41 | * a pointer to a flattened device tree blob. | |
42 | * | |
43 | * In most cases we want to pass an FDT to the payload, so reserve one slot of | |
44 | * config table space for it. The pointer gets populated by do_bootefi_exec(). | |
45 | */ | |
3c63db9c | 46 | static struct efi_configuration_table __efi_runtime_data efi_conf_table[2]; |
bee91169 | 47 | |
65e4c0b1 | 48 | #ifdef CONFIG_ARM |
bee91169 AG |
49 | /* |
50 | * The "gd" pointer lives in a register on ARM and AArch64 that we declare | |
51 | * fixed when compiling U-Boot. However, the payload does not know about that | |
52 | * restriction so we need to manually swap its and our view of that register on | |
53 | * EFI callback entry/exit. | |
54 | */ | |
55 | static volatile void *efi_gd, *app_gd; | |
65e4c0b1 | 56 | #endif |
bee91169 | 57 | |
c160d2f5 | 58 | static int entry_count; |
af65db85 | 59 | static int nesting_level; |
bc4f9133 HS |
60 | /* GUID of the device tree table */ |
61 | const efi_guid_t efi_guid_fdt = EFI_FDT_GUID; | |
f0959dbe HS |
62 | /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */ |
63 | const efi_guid_t efi_guid_driver_binding_protocol = | |
64 | EFI_DRIVER_BINDING_PROTOCOL_GUID; | |
c160d2f5 | 65 | |
a3a28f5f HS |
66 | /* event group ExitBootServices() invoked */ |
67 | const efi_guid_t efi_guid_event_group_exit_boot_services = | |
68 | EFI_EVENT_GROUP_EXIT_BOOT_SERVICES; | |
69 | /* event group SetVirtualAddressMap() invoked */ | |
70 | const efi_guid_t efi_guid_event_group_virtual_address_change = | |
71 | EFI_EVENT_GROUP_VIRTUAL_ADDRESS_CHANGE; | |
72 | /* event group memory map changed */ | |
73 | const efi_guid_t efi_guid_event_group_memory_map_change = | |
74 | EFI_EVENT_GROUP_MEMORY_MAP_CHANGE; | |
75 | /* event group boot manager about to boot */ | |
76 | const efi_guid_t efi_guid_event_group_ready_to_boot = | |
77 | EFI_EVENT_GROUP_READY_TO_BOOT; | |
78 | /* event group ResetSystem() invoked (before ExitBootServices) */ | |
79 | const efi_guid_t efi_guid_event_group_reset_system = | |
80 | EFI_EVENT_GROUP_RESET_SYSTEM; | |
81 | ||
2074f700 HS |
82 | static efi_status_t EFIAPI efi_disconnect_controller( |
83 | efi_handle_t controller_handle, | |
84 | efi_handle_t driver_image_handle, | |
85 | efi_handle_t child_handle); | |
3f9b0042 | 86 | |
c160d2f5 RC |
87 | /* Called on every callback entry */ |
88 | int __efi_entry_check(void) | |
89 | { | |
90 | int ret = entry_count++ == 0; | |
91 | #ifdef CONFIG_ARM | |
92 | assert(efi_gd); | |
93 | app_gd = gd; | |
94 | gd = efi_gd; | |
95 | #endif | |
96 | return ret; | |
97 | } | |
98 | ||
99 | /* Called on every callback exit */ | |
100 | int __efi_exit_check(void) | |
101 | { | |
102 | int ret = --entry_count == 0; | |
103 | #ifdef CONFIG_ARM | |
104 | gd = app_gd; | |
105 | #endif | |
106 | return ret; | |
107 | } | |
108 | ||
bee91169 AG |
109 | /* Called from do_bootefi_exec() */ |
110 | void efi_save_gd(void) | |
111 | { | |
65e4c0b1 | 112 | #ifdef CONFIG_ARM |
bee91169 | 113 | efi_gd = gd; |
65e4c0b1 | 114 | #endif |
bee91169 AG |
115 | } |
116 | ||
c160d2f5 RC |
117 | /* |
118 | * Special case handler for error/abort that just forces things back | |
119 | * to u-boot world so we can dump out an abort msg, without any care | |
120 | * about returning back to UEFI world. | |
121 | */ | |
bee91169 AG |
122 | void efi_restore_gd(void) |
123 | { | |
65e4c0b1 | 124 | #ifdef CONFIG_ARM |
bee91169 AG |
125 | /* Only restore if we're already in EFI context */ |
126 | if (!efi_gd) | |
127 | return; | |
bee91169 | 128 | gd = efi_gd; |
65e4c0b1 | 129 | #endif |
bee91169 AG |
130 | } |
131 | ||
af65db85 | 132 | /* |
c8df80c5 HS |
133 | * Return a string for indenting with two spaces per level. A maximum of ten |
134 | * indent levels is supported. Higher indent levels will be truncated. | |
135 | * | |
136 | * @level indent level | |
137 | * @return indent string | |
af65db85 RC |
138 | */ |
139 | static const char *indent_string(int level) | |
140 | { | |
141 | const char *indent = " "; | |
142 | const int max = strlen(indent); | |
ab9efa97 | 143 | |
af65db85 RC |
144 | level = min(max, level * 2); |
145 | return &indent[max - level]; | |
146 | } | |
147 | ||
ae0bd3a9 HS |
148 | const char *__efi_nesting(void) |
149 | { | |
150 | return indent_string(nesting_level); | |
151 | } | |
152 | ||
af65db85 RC |
153 | const char *__efi_nesting_inc(void) |
154 | { | |
155 | return indent_string(nesting_level++); | |
156 | } | |
157 | ||
158 | const char *__efi_nesting_dec(void) | |
159 | { | |
160 | return indent_string(--nesting_level); | |
161 | } | |
162 | ||
332468f7 HS |
163 | /* |
164 | * Queue an EFI event. | |
165 | * | |
166 | * This function queues the notification function of the event for future | |
167 | * execution. | |
168 | * | |
169 | * The notification function is called if the task priority level of the | |
170 | * event is higher than the current task priority level. | |
171 | * | |
172 | * For the SignalEvent service see efi_signal_event_ext. | |
173 | * | |
174 | * @event event to signal | |
9bc9664d | 175 | * @check_tpl check the TPL level |
332468f7 | 176 | */ |
b095f3c8 | 177 | static void efi_queue_event(struct efi_event *event, bool check_tpl) |
c6841592 | 178 | { |
ca62a4f5 | 179 | if (event->notify_function) { |
e190e897 | 180 | event->is_queued = true; |
32f4b2f8 | 181 | /* Check TPL */ |
9bc9664d | 182 | if (check_tpl && efi_tpl >= event->notify_tpl) |
32f4b2f8 | 183 | return; |
ea630ce9 HS |
184 | EFI_CALL_VOID(event->notify_function(event, |
185 | event->notify_context)); | |
c6841592 | 186 | } |
e190e897 | 187 | event->is_queued = false; |
c6841592 HS |
188 | } |
189 | ||
b095f3c8 HS |
190 | /* |
191 | * Signal an EFI event. | |
192 | * | |
193 | * This function signals an event. If the event belongs to an event group | |
194 | * all events of the group are signaled. If they are of type EVT_NOTIFY_SIGNAL | |
195 | * their notification function is queued. | |
196 | * | |
197 | * For the SignalEvent service see efi_signal_event_ext. | |
198 | * | |
199 | * @event event to signal | |
200 | * @check_tpl check the TPL level | |
201 | */ | |
202 | void efi_signal_event(struct efi_event *event, bool check_tpl) | |
203 | { | |
204 | if (event->group) { | |
205 | struct efi_event *evt; | |
206 | ||
207 | /* | |
208 | * The signaled state has to set before executing any | |
209 | * notification function | |
210 | */ | |
211 | list_for_each_entry(evt, &efi_events, link) { | |
212 | if (!evt->group || guidcmp(evt->group, event->group)) | |
213 | continue; | |
214 | if (evt->is_signaled) | |
215 | continue; | |
216 | evt->is_signaled = true; | |
217 | if (evt->type & EVT_NOTIFY_SIGNAL && | |
218 | evt->notify_function) | |
219 | evt->is_queued = true; | |
220 | } | |
221 | list_for_each_entry(evt, &efi_events, link) { | |
222 | if (!evt->group || guidcmp(evt->group, event->group)) | |
223 | continue; | |
224 | if (evt->is_queued) | |
225 | efi_queue_event(evt, check_tpl); | |
226 | } | |
227 | } else if (!event->is_signaled) { | |
228 | event->is_signaled = true; | |
229 | if (event->type & EVT_NOTIFY_SIGNAL) | |
230 | efi_queue_event(event, check_tpl); | |
231 | } | |
232 | } | |
233 | ||
332468f7 HS |
234 | /* |
235 | * Raise the task priority level. | |
236 | * | |
237 | * This function implements the RaiseTpl service. | |
238 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
239 | * for details. | |
240 | * | |
241 | * @new_tpl new value of the task priority level | |
242 | * @return old value of the task priority level | |
243 | */ | |
152cade3 | 244 | static unsigned long EFIAPI efi_raise_tpl(efi_uintn_t new_tpl) |
bee91169 | 245 | { |
152cade3 | 246 | efi_uintn_t old_tpl = efi_tpl; |
32f4b2f8 | 247 | |
503f2695 | 248 | EFI_ENTRY("0x%zx", new_tpl); |
32f4b2f8 HS |
249 | |
250 | if (new_tpl < efi_tpl) | |
251 | debug("WARNING: new_tpl < current_tpl in %s\n", __func__); | |
252 | efi_tpl = new_tpl; | |
253 | if (efi_tpl > TPL_HIGH_LEVEL) | |
254 | efi_tpl = TPL_HIGH_LEVEL; | |
255 | ||
256 | EFI_EXIT(EFI_SUCCESS); | |
257 | return old_tpl; | |
bee91169 AG |
258 | } |
259 | ||
332468f7 HS |
260 | /* |
261 | * Lower the task priority level. | |
262 | * | |
263 | * This function implements the RestoreTpl service. | |
264 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
265 | * for details. | |
266 | * | |
267 | * @old_tpl value of the task priority level to be restored | |
268 | */ | |
152cade3 | 269 | static void EFIAPI efi_restore_tpl(efi_uintn_t old_tpl) |
bee91169 | 270 | { |
503f2695 | 271 | EFI_ENTRY("0x%zx", old_tpl); |
32f4b2f8 HS |
272 | |
273 | if (old_tpl > efi_tpl) | |
274 | debug("WARNING: old_tpl > current_tpl in %s\n", __func__); | |
275 | efi_tpl = old_tpl; | |
276 | if (efi_tpl > TPL_HIGH_LEVEL) | |
277 | efi_tpl = TPL_HIGH_LEVEL; | |
278 | ||
0f7fcc72 HS |
279 | /* |
280 | * Lowering the TPL may have made queued events eligible for execution. | |
281 | */ | |
282 | efi_timer_check(); | |
283 | ||
32f4b2f8 | 284 | EFI_EXIT(EFI_SUCCESS); |
bee91169 AG |
285 | } |
286 | ||
332468f7 HS |
287 | /* |
288 | * Allocate memory pages. | |
289 | * | |
290 | * This function implements the AllocatePages service. | |
291 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
292 | * for details. | |
293 | * | |
294 | * @type type of allocation to be performed | |
295 | * @memory_type usage type of the allocated memory | |
296 | * @pages number of pages to be allocated | |
297 | * @memory allocated memory | |
298 | * @return status code | |
299 | */ | |
6e0bf8d8 | 300 | static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type, |
f5a2a938 | 301 | efi_uintn_t pages, |
6e0bf8d8 | 302 | uint64_t *memory) |
bee91169 AG |
303 | { |
304 | efi_status_t r; | |
305 | ||
f5a2a938 | 306 | EFI_ENTRY("%d, %d, 0x%zx, %p", type, memory_type, pages, memory); |
bee91169 AG |
307 | r = efi_allocate_pages(type, memory_type, pages, memory); |
308 | return EFI_EXIT(r); | |
309 | } | |
310 | ||
332468f7 HS |
311 | /* |
312 | * Free memory pages. | |
313 | * | |
314 | * This function implements the FreePages service. | |
315 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
316 | * for details. | |
317 | * | |
318 | * @memory start of the memory area to be freed | |
319 | * @pages number of pages to be freed | |
320 | * @return status code | |
321 | */ | |
6e0bf8d8 | 322 | static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory, |
f5a2a938 | 323 | efi_uintn_t pages) |
bee91169 AG |
324 | { |
325 | efi_status_t r; | |
326 | ||
ab9efa97 | 327 | EFI_ENTRY("%" PRIx64 ", 0x%zx", memory, pages); |
bee91169 AG |
328 | r = efi_free_pages(memory, pages); |
329 | return EFI_EXIT(r); | |
330 | } | |
331 | ||
332468f7 HS |
332 | /* |
333 | * Get map describing memory usage. | |
334 | * | |
335 | * This function implements the GetMemoryMap service. | |
336 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
337 | * for details. | |
338 | * | |
339 | * @memory_map_size on entry the size, in bytes, of the memory map buffer, | |
340 | * on exit the size of the copied memory map | |
341 | * @memory_map buffer to which the memory map is written | |
342 | * @map_key key for the memory map | |
343 | * @descriptor_size size of an individual memory descriptor | |
344 | * @descriptor_version version number of the memory descriptor structure | |
345 | * @return status code | |
346 | */ | |
6e0bf8d8 | 347 | static efi_status_t EFIAPI efi_get_memory_map_ext( |
f5a2a938 | 348 | efi_uintn_t *memory_map_size, |
6e0bf8d8 | 349 | struct efi_mem_desc *memory_map, |
f5a2a938 HS |
350 | efi_uintn_t *map_key, |
351 | efi_uintn_t *descriptor_size, | |
6e0bf8d8 | 352 | uint32_t *descriptor_version) |
bee91169 AG |
353 | { |
354 | efi_status_t r; | |
355 | ||
356 | EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map, | |
357 | map_key, descriptor_size, descriptor_version); | |
358 | r = efi_get_memory_map(memory_map_size, memory_map, map_key, | |
359 | descriptor_size, descriptor_version); | |
360 | return EFI_EXIT(r); | |
361 | } | |
362 | ||
332468f7 HS |
363 | /* |
364 | * Allocate memory from pool. | |
365 | * | |
366 | * This function implements the AllocatePool service. | |
367 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
368 | * for details. | |
369 | * | |
370 | * @pool_type type of the pool from which memory is to be allocated | |
371 | * @size number of bytes to be allocated | |
372 | * @buffer allocated memory | |
373 | * @return status code | |
374 | */ | |
ead1274b | 375 | static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type, |
f5a2a938 | 376 | efi_uintn_t size, |
ead1274b | 377 | void **buffer) |
bee91169 | 378 | { |
1cd29f0a AG |
379 | efi_status_t r; |
380 | ||
f5a2a938 | 381 | EFI_ENTRY("%d, %zd, %p", pool_type, size, buffer); |
ead1274b | 382 | r = efi_allocate_pool(pool_type, size, buffer); |
1cd29f0a | 383 | return EFI_EXIT(r); |
bee91169 AG |
384 | } |
385 | ||
332468f7 HS |
386 | /* |
387 | * Free memory from pool. | |
388 | * | |
389 | * This function implements the FreePool service. | |
390 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
391 | * for details. | |
392 | * | |
393 | * @buffer start of memory to be freed | |
394 | * @return status code | |
395 | */ | |
42417bc8 | 396 | static efi_status_t EFIAPI efi_free_pool_ext(void *buffer) |
bee91169 | 397 | { |
1cd29f0a AG |
398 | efi_status_t r; |
399 | ||
400 | EFI_ENTRY("%p", buffer); | |
42417bc8 | 401 | r = efi_free_pool(buffer); |
1cd29f0a | 402 | return EFI_EXIT(r); |
bee91169 AG |
403 | } |
404 | ||
44549d62 HS |
405 | /* |
406 | * Add a new object to the object list. | |
407 | * | |
408 | * The protocols list is initialized. | |
409 | * The object handle is set. | |
410 | * | |
411 | * @obj object to be added | |
412 | */ | |
413 | void efi_add_handle(struct efi_object *obj) | |
414 | { | |
415 | if (!obj) | |
416 | return; | |
417 | INIT_LIST_HEAD(&obj->protocols); | |
418 | obj->handle = obj; | |
419 | list_add_tail(&obj->link, &efi_obj_list); | |
420 | } | |
421 | ||
2edab5e2 HS |
422 | /* |
423 | * Create handle. | |
424 | * | |
425 | * @handle new handle | |
426 | * @return status code | |
427 | */ | |
2074f700 | 428 | efi_status_t efi_create_handle(efi_handle_t *handle) |
3cc6e3fe HS |
429 | { |
430 | struct efi_object *obj; | |
431 | efi_status_t r; | |
432 | ||
433 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, | |
434 | sizeof(struct efi_object), | |
435 | (void **)&obj); | |
436 | if (r != EFI_SUCCESS) | |
437 | return r; | |
44549d62 HS |
438 | efi_add_handle(obj); |
439 | *handle = obj->handle; | |
3cc6e3fe HS |
440 | return r; |
441 | } | |
442 | ||
678e03a0 HS |
443 | /* |
444 | * Find a protocol on a handle. | |
445 | * | |
446 | * @handle handle | |
447 | * @protocol_guid GUID of the protocol | |
448 | * @handler reference to the protocol | |
449 | * @return status code | |
450 | */ | |
2074f700 | 451 | efi_status_t efi_search_protocol(const efi_handle_t handle, |
678e03a0 HS |
452 | const efi_guid_t *protocol_guid, |
453 | struct efi_handler **handler) | |
454 | { | |
455 | struct efi_object *efiobj; | |
456 | struct list_head *lhandle; | |
457 | ||
458 | if (!handle || !protocol_guid) | |
459 | return EFI_INVALID_PARAMETER; | |
460 | efiobj = efi_search_obj(handle); | |
461 | if (!efiobj) | |
462 | return EFI_INVALID_PARAMETER; | |
463 | list_for_each(lhandle, &efiobj->protocols) { | |
464 | struct efi_handler *protocol; | |
465 | ||
466 | protocol = list_entry(lhandle, struct efi_handler, link); | |
467 | if (!guidcmp(protocol->guid, protocol_guid)) { | |
468 | if (handler) | |
469 | *handler = protocol; | |
470 | return EFI_SUCCESS; | |
471 | } | |
472 | } | |
473 | return EFI_NOT_FOUND; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Delete protocol from a handle. | |
478 | * | |
479 | * @handle handle from which the protocol shall be deleted | |
480 | * @protocol GUID of the protocol to be deleted | |
481 | * @protocol_interface interface of the protocol implementation | |
482 | * @return status code | |
483 | */ | |
2074f700 HS |
484 | efi_status_t efi_remove_protocol(const efi_handle_t handle, |
485 | const efi_guid_t *protocol, | |
678e03a0 HS |
486 | void *protocol_interface) |
487 | { | |
488 | struct efi_handler *handler; | |
489 | efi_status_t ret; | |
490 | ||
491 | ret = efi_search_protocol(handle, protocol, &handler); | |
492 | if (ret != EFI_SUCCESS) | |
493 | return ret; | |
494 | if (guidcmp(handler->guid, protocol)) | |
495 | return EFI_INVALID_PARAMETER; | |
496 | list_del(&handler->link); | |
497 | free(handler); | |
498 | return EFI_SUCCESS; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Delete all protocols from a handle. | |
503 | * | |
504 | * @handle handle from which the protocols shall be deleted | |
505 | * @return status code | |
506 | */ | |
2074f700 | 507 | efi_status_t efi_remove_all_protocols(const efi_handle_t handle) |
678e03a0 HS |
508 | { |
509 | struct efi_object *efiobj; | |
32e6fed6 HS |
510 | struct efi_handler *protocol; |
511 | struct efi_handler *pos; | |
678e03a0 HS |
512 | |
513 | efiobj = efi_search_obj(handle); | |
514 | if (!efiobj) | |
515 | return EFI_INVALID_PARAMETER; | |
32e6fed6 | 516 | list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) { |
678e03a0 HS |
517 | efi_status_t ret; |
518 | ||
678e03a0 HS |
519 | ret = efi_remove_protocol(handle, protocol->guid, |
520 | protocol->protocol_interface); | |
521 | if (ret != EFI_SUCCESS) | |
522 | return ret; | |
523 | } | |
524 | return EFI_SUCCESS; | |
525 | } | |
526 | ||
527 | /* | |
528 | * Delete handle. | |
529 | * | |
530 | * @handle handle to delete | |
531 | */ | |
532 | void efi_delete_handle(struct efi_object *obj) | |
533 | { | |
534 | if (!obj) | |
535 | return; | |
536 | efi_remove_all_protocols(obj->handle); | |
537 | list_del(&obj->link); | |
538 | free(obj); | |
539 | } | |
540 | ||
bee91169 | 541 | /* |
43bce442 HS |
542 | * Check if a pointer is a valid event. |
543 | * | |
544 | * @event pointer to check | |
545 | * @return status code | |
bee91169 | 546 | */ |
43bce442 HS |
547 | static efi_status_t efi_is_event(const struct efi_event *event) |
548 | { | |
549 | const struct efi_event *evt; | |
550 | ||
551 | if (!event) | |
552 | return EFI_INVALID_PARAMETER; | |
553 | list_for_each_entry(evt, &efi_events, link) { | |
554 | if (evt == event) | |
555 | return EFI_SUCCESS; | |
556 | } | |
557 | return EFI_INVALID_PARAMETER; | |
558 | } | |
bee91169 | 559 | |
332468f7 HS |
560 | /* |
561 | * Create an event. | |
562 | * | |
563 | * This function is used inside U-Boot code to create an event. | |
564 | * | |
565 | * For the API function implementing the CreateEvent service see | |
566 | * efi_create_event_ext. | |
567 | * | |
568 | * @type type of the event to create | |
569 | * @notify_tpl task priority level of the event | |
570 | * @notify_function notification function of the event | |
571 | * @notify_context pointer passed to the notification function | |
572 | * @event created event | |
573 | * @return status code | |
574 | */ | |
152cade3 | 575 | efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl, |
49deb455 | 576 | void (EFIAPI *notify_function) ( |
2fd945fe HS |
577 | struct efi_event *event, |
578 | void *context), | |
b095f3c8 HS |
579 | void *notify_context, efi_guid_t *group, |
580 | struct efi_event **event) | |
bee91169 | 581 | { |
43bce442 | 582 | struct efi_event *evt; |
c6841592 | 583 | |
a95343b8 | 584 | if (event == NULL) |
49deb455 | 585 | return EFI_INVALID_PARAMETER; |
a95343b8 JG |
586 | |
587 | if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT)) | |
49deb455 | 588 | return EFI_INVALID_PARAMETER; |
a95343b8 | 589 | |
43bce442 | 590 | if ((type & (EVT_NOTIFY_SIGNAL | EVT_NOTIFY_WAIT)) && |
a95343b8 | 591 | notify_function == NULL) |
49deb455 | 592 | return EFI_INVALID_PARAMETER; |
a95343b8 | 593 | |
43bce442 HS |
594 | evt = calloc(1, sizeof(struct efi_event)); |
595 | if (!evt) | |
596 | return EFI_OUT_OF_RESOURCES; | |
597 | evt->type = type; | |
598 | evt->notify_tpl = notify_tpl; | |
599 | evt->notify_function = notify_function; | |
600 | evt->notify_context = notify_context; | |
b095f3c8 | 601 | evt->group = group; |
43bce442 HS |
602 | /* Disable timers on bootup */ |
603 | evt->trigger_next = -1ULL; | |
604 | evt->is_queued = false; | |
605 | evt->is_signaled = false; | |
606 | list_add_tail(&evt->link, &efi_events); | |
607 | *event = evt; | |
608 | return EFI_SUCCESS; | |
bee91169 AG |
609 | } |
610 | ||
9f0930e5 HS |
611 | /* |
612 | * Create an event in a group. | |
613 | * | |
614 | * This function implements the CreateEventEx service. | |
615 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
616 | * for details. | |
617 | * TODO: Support event groups | |
618 | * | |
619 | * @type type of the event to create | |
620 | * @notify_tpl task priority level of the event | |
621 | * @notify_function notification function of the event | |
622 | * @notify_context pointer passed to the notification function | |
623 | * @event created event | |
624 | * @event_group event group | |
625 | * @return status code | |
626 | */ | |
627 | efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl, | |
628 | void (EFIAPI *notify_function) ( | |
629 | struct efi_event *event, | |
630 | void *context), | |
631 | void *notify_context, | |
632 | efi_guid_t *event_group, | |
633 | struct efi_event **event) | |
634 | { | |
635 | EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function, | |
636 | notify_context, event_group); | |
9f0930e5 | 637 | return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function, |
b095f3c8 | 638 | notify_context, event_group, event)); |
9f0930e5 HS |
639 | } |
640 | ||
332468f7 HS |
641 | /* |
642 | * Create an event. | |
643 | * | |
644 | * This function implements the CreateEvent service. | |
645 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
646 | * for details. | |
647 | * | |
648 | * @type type of the event to create | |
649 | * @notify_tpl task priority level of the event | |
650 | * @notify_function notification function of the event | |
651 | * @notify_context pointer passed to the notification function | |
652 | * @event created event | |
653 | * @return status code | |
654 | */ | |
49deb455 | 655 | static efi_status_t EFIAPI efi_create_event_ext( |
152cade3 | 656 | uint32_t type, efi_uintn_t notify_tpl, |
49deb455 HS |
657 | void (EFIAPI *notify_function) ( |
658 | struct efi_event *event, | |
659 | void *context), | |
660 | void *notify_context, struct efi_event **event) | |
661 | { | |
662 | EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function, | |
663 | notify_context); | |
664 | return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function, | |
b095f3c8 | 665 | notify_context, NULL, event)); |
49deb455 HS |
666 | } |
667 | ||
bee91169 | 668 | /* |
332468f7 HS |
669 | * Check if a timer event has occurred or a queued notification function should |
670 | * be called. | |
671 | * | |
bee91169 | 672 | * Our timers have to work without interrupts, so we check whenever keyboard |
332468f7 | 673 | * input or disk accesses happen if enough time elapsed for them to fire. |
bee91169 AG |
674 | */ |
675 | void efi_timer_check(void) | |
676 | { | |
43bce442 | 677 | struct efi_event *evt; |
bee91169 AG |
678 | u64 now = timer_get_us(); |
679 | ||
43bce442 HS |
680 | list_for_each_entry(evt, &efi_events, link) { |
681 | if (evt->is_queued) | |
b095f3c8 | 682 | efi_queue_event(evt, true); |
43bce442 | 683 | if (!(evt->type & EVT_TIMER) || now < evt->trigger_next) |
ca62a4f5 | 684 | continue; |
43bce442 | 685 | switch (evt->trigger_type) { |
ca62a4f5 | 686 | case EFI_TIMER_RELATIVE: |
43bce442 | 687 | evt->trigger_type = EFI_TIMER_STOP; |
ca62a4f5 HS |
688 | break; |
689 | case EFI_TIMER_PERIODIC: | |
43bce442 | 690 | evt->trigger_next += evt->trigger_time; |
ca62a4f5 HS |
691 | break; |
692 | default: | |
693 | continue; | |
c6841592 | 694 | } |
b095f3c8 | 695 | evt->is_signaled = false; |
43bce442 | 696 | efi_signal_event(evt, true); |
bee91169 | 697 | } |
bee91169 AG |
698 | WATCHDOG_RESET(); |
699 | } | |
700 | ||
332468f7 HS |
701 | /* |
702 | * Set the trigger time for a timer event or stop the event. | |
703 | * | |
704 | * This is the function for internal usage in U-Boot. For the API function | |
705 | * implementing the SetTimer service see efi_set_timer_ext. | |
706 | * | |
707 | * @event event for which the timer is set | |
708 | * @type type of the timer | |
709 | * @trigger_time trigger period in multiples of 100ns | |
710 | * @return status code | |
711 | */ | |
b521d29e | 712 | efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, |
bfc72462 | 713 | uint64_t trigger_time) |
bee91169 | 714 | { |
43bce442 HS |
715 | /* Check that the event is valid */ |
716 | if (efi_is_event(event) != EFI_SUCCESS || !(event->type & EVT_TIMER)) | |
717 | return EFI_INVALID_PARAMETER; | |
bee91169 | 718 | |
8787b02e HS |
719 | /* |
720 | * The parameter defines a multiple of 100ns. | |
721 | * We use multiples of 1000ns. So divide by 10. | |
722 | */ | |
7d963323 | 723 | do_div(trigger_time, 10); |
bee91169 | 724 | |
43bce442 HS |
725 | switch (type) { |
726 | case EFI_TIMER_STOP: | |
727 | event->trigger_next = -1ULL; | |
728 | break; | |
729 | case EFI_TIMER_PERIODIC: | |
730 | case EFI_TIMER_RELATIVE: | |
731 | event->trigger_next = timer_get_us() + trigger_time; | |
732 | break; | |
733 | default: | |
734 | return EFI_INVALID_PARAMETER; | |
bee91169 | 735 | } |
43bce442 HS |
736 | event->trigger_type = type; |
737 | event->trigger_time = trigger_time; | |
738 | event->is_signaled = false; | |
739 | return EFI_SUCCESS; | |
bfc72462 HS |
740 | } |
741 | ||
332468f7 HS |
742 | /* |
743 | * Set the trigger time for a timer event or stop the event. | |
744 | * | |
745 | * This function implements the SetTimer service. | |
746 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
747 | * for details. | |
748 | * | |
749 | * @event event for which the timer is set | |
750 | * @type type of the timer | |
751 | * @trigger_time trigger period in multiples of 100ns | |
752 | * @return status code | |
753 | */ | |
b521d29e HS |
754 | static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event, |
755 | enum efi_timer_delay type, | |
756 | uint64_t trigger_time) | |
bfc72462 | 757 | { |
ab9efa97 | 758 | EFI_ENTRY("%p, %d, %" PRIx64, event, type, trigger_time); |
bfc72462 | 759 | return EFI_EXIT(efi_set_timer(event, type, trigger_time)); |
bee91169 AG |
760 | } |
761 | ||
332468f7 HS |
762 | /* |
763 | * Wait for events to be signaled. | |
764 | * | |
765 | * This function implements the WaitForEvent service. | |
766 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
767 | * for details. | |
768 | * | |
769 | * @num_events number of events to be waited for | |
770 | * @events events to be waited for | |
771 | * @index index of the event that was signaled | |
772 | * @return status code | |
773 | */ | |
f5a2a938 | 774 | static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events, |
2fd945fe | 775 | struct efi_event **event, |
f5a2a938 | 776 | efi_uintn_t *index) |
bee91169 | 777 | { |
43bce442 | 778 | int i; |
bee91169 | 779 | |
f5a2a938 | 780 | EFI_ENTRY("%zd, %p, %p", num_events, event, index); |
bee91169 | 781 | |
c6841592 HS |
782 | /* Check parameters */ |
783 | if (!num_events || !event) | |
784 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
32f4b2f8 HS |
785 | /* Check TPL */ |
786 | if (efi_tpl != TPL_APPLICATION) | |
787 | return EFI_EXIT(EFI_UNSUPPORTED); | |
c6841592 | 788 | for (i = 0; i < num_events; ++i) { |
43bce442 HS |
789 | if (efi_is_event(event[i]) != EFI_SUCCESS) |
790 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
c6841592 HS |
791 | if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL) |
792 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
e190e897 | 793 | if (!event[i]->is_signaled) |
b095f3c8 | 794 | efi_queue_event(event[i], true); |
c6841592 HS |
795 | } |
796 | ||
797 | /* Wait for signal */ | |
798 | for (;;) { | |
799 | for (i = 0; i < num_events; ++i) { | |
e190e897 | 800 | if (event[i]->is_signaled) |
c6841592 HS |
801 | goto out; |
802 | } | |
803 | /* Allow events to occur. */ | |
804 | efi_timer_check(); | |
805 | } | |
806 | ||
807 | out: | |
808 | /* | |
809 | * Reset the signal which is passed to the caller to allow periodic | |
810 | * events to occur. | |
811 | */ | |
e190e897 | 812 | event[i]->is_signaled = false; |
c6841592 HS |
813 | if (index) |
814 | *index = i; | |
bee91169 AG |
815 | |
816 | return EFI_EXIT(EFI_SUCCESS); | |
817 | } | |
818 | ||
332468f7 HS |
819 | /* |
820 | * Signal an EFI event. | |
821 | * | |
822 | * This function implements the SignalEvent service. | |
823 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
824 | * for details. | |
825 | * | |
826 | * This functions sets the signaled state of the event and queues the | |
827 | * notification function for execution. | |
828 | * | |
829 | * @event event to signal | |
10a08c4e | 830 | * @return status code |
332468f7 | 831 | */ |
c6841592 | 832 | static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event) |
bee91169 AG |
833 | { |
834 | EFI_ENTRY("%p", event); | |
43bce442 HS |
835 | if (efi_is_event(event) != EFI_SUCCESS) |
836 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
b095f3c8 | 837 | efi_signal_event(event, true); |
bee91169 AG |
838 | return EFI_EXIT(EFI_SUCCESS); |
839 | } | |
840 | ||
332468f7 HS |
841 | /* |
842 | * Close an EFI event. | |
843 | * | |
844 | * This function implements the CloseEvent service. | |
845 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
846 | * for details. | |
847 | * | |
848 | * @event event to close | |
849 | * @return status code | |
850 | */ | |
2fd945fe | 851 | static efi_status_t EFIAPI efi_close_event(struct efi_event *event) |
bee91169 AG |
852 | { |
853 | EFI_ENTRY("%p", event); | |
43bce442 HS |
854 | if (efi_is_event(event) != EFI_SUCCESS) |
855 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
856 | list_del(&event->link); | |
857 | free(event); | |
858 | return EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
859 | } |
860 | ||
332468f7 HS |
861 | /* |
862 | * Check if an event is signaled. | |
863 | * | |
864 | * This function implements the CheckEvent service. | |
865 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
866 | * for details. | |
867 | * | |
7069515e HS |
868 | * If an event is not signaled yet, the notification function is queued. |
869 | * The signaled state is cleared. | |
332468f7 HS |
870 | * |
871 | * @event event to check | |
872 | * @return status code | |
873 | */ | |
2fd945fe | 874 | static efi_status_t EFIAPI efi_check_event(struct efi_event *event) |
bee91169 AG |
875 | { |
876 | EFI_ENTRY("%p", event); | |
c6841592 | 877 | efi_timer_check(); |
43bce442 HS |
878 | if (efi_is_event(event) != EFI_SUCCESS || |
879 | event->type & EVT_NOTIFY_SIGNAL) | |
880 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
881 | if (!event->is_signaled) | |
b095f3c8 | 882 | efi_queue_event(event, true); |
43bce442 HS |
883 | if (event->is_signaled) { |
884 | event->is_signaled = false; | |
885 | return EFI_EXIT(EFI_SUCCESS); | |
c6841592 | 886 | } |
43bce442 | 887 | return EFI_EXIT(EFI_NOT_READY); |
bee91169 AG |
888 | } |
889 | ||
7b9f8ad7 HS |
890 | /* |
891 | * Find the internal EFI object for a handle. | |
892 | * | |
893 | * @handle handle to find | |
894 | * @return EFI object | |
895 | */ | |
2074f700 | 896 | struct efi_object *efi_search_obj(const efi_handle_t handle) |
7b9f8ad7 | 897 | { |
1b68153a | 898 | struct efi_object *efiobj; |
7b9f8ad7 | 899 | |
1b68153a | 900 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
7b9f8ad7 HS |
901 | if (efiobj->handle == handle) |
902 | return efiobj; | |
903 | } | |
904 | ||
905 | return NULL; | |
906 | } | |
907 | ||
fe1599da HS |
908 | /* |
909 | * Create open protocol info entry and add it to a protocol. | |
910 | * | |
911 | * @handler handler of a protocol | |
912 | * @return open protocol info entry | |
913 | */ | |
914 | static struct efi_open_protocol_info_entry *efi_create_open_info( | |
915 | struct efi_handler *handler) | |
916 | { | |
917 | struct efi_open_protocol_info_item *item; | |
918 | ||
919 | item = calloc(1, sizeof(struct efi_open_protocol_info_item)); | |
920 | if (!item) | |
921 | return NULL; | |
922 | /* Append the item to the open protocol info list. */ | |
923 | list_add_tail(&item->link, &handler->open_infos); | |
924 | ||
925 | return &item->info; | |
926 | } | |
927 | ||
928 | /* | |
929 | * Remove an open protocol info entry from a protocol. | |
930 | * | |
931 | * @handler handler of a protocol | |
932 | * @return status code | |
933 | */ | |
934 | static efi_status_t efi_delete_open_info( | |
935 | struct efi_open_protocol_info_item *item) | |
936 | { | |
937 | list_del(&item->link); | |
938 | free(item); | |
939 | return EFI_SUCCESS; | |
940 | } | |
941 | ||
3f79a2b5 HS |
942 | /* |
943 | * Install new protocol on a handle. | |
944 | * | |
945 | * @handle handle on which the protocol shall be installed | |
946 | * @protocol GUID of the protocol to be installed | |
947 | * @protocol_interface interface of the protocol implementation | |
948 | * @return status code | |
949 | */ | |
2074f700 HS |
950 | efi_status_t efi_add_protocol(const efi_handle_t handle, |
951 | const efi_guid_t *protocol, | |
3f79a2b5 HS |
952 | void *protocol_interface) |
953 | { | |
954 | struct efi_object *efiobj; | |
955 | struct efi_handler *handler; | |
956 | efi_status_t ret; | |
3f79a2b5 HS |
957 | |
958 | efiobj = efi_search_obj(handle); | |
959 | if (!efiobj) | |
960 | return EFI_INVALID_PARAMETER; | |
961 | ret = efi_search_protocol(handle, protocol, NULL); | |
962 | if (ret != EFI_NOT_FOUND) | |
963 | return EFI_INVALID_PARAMETER; | |
964 | handler = calloc(1, sizeof(struct efi_handler)); | |
965 | if (!handler) | |
966 | return EFI_OUT_OF_RESOURCES; | |
69fb6b1a HS |
967 | handler->guid = protocol; |
968 | handler->protocol_interface = protocol_interface; | |
fe1599da | 969 | INIT_LIST_HEAD(&handler->open_infos); |
69fb6b1a | 970 | list_add_tail(&handler->link, &efiobj->protocols); |
d5504144 HS |
971 | if (!guidcmp(&efi_guid_device_path, protocol)) |
972 | EFI_PRINT("installed device path '%pD'\n", protocol_interface); | |
69fb6b1a | 973 | return EFI_SUCCESS; |
3f79a2b5 HS |
974 | } |
975 | ||
332468f7 HS |
976 | /* |
977 | * Install protocol interface. | |
978 | * | |
1760ef57 HS |
979 | * This function implements the InstallProtocolInterface service. |
980 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
981 | * for details. | |
332468f7 HS |
982 | * |
983 | * @handle handle on which the protocol shall be installed | |
984 | * @protocol GUID of the protocol to be installed | |
985 | * @protocol_interface_type type of the interface to be installed, | |
986 | * always EFI_NATIVE_INTERFACE | |
987 | * @protocol_interface interface of the protocol implementation | |
988 | * @return status code | |
989 | */ | |
1760ef57 HS |
990 | static efi_status_t EFIAPI efi_install_protocol_interface( |
991 | void **handle, const efi_guid_t *protocol, | |
992 | int protocol_interface_type, void *protocol_interface) | |
bee91169 | 993 | { |
e0549f8a HS |
994 | efi_status_t r; |
995 | ||
1760ef57 HS |
996 | EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type, |
997 | protocol_interface); | |
998 | ||
e0549f8a HS |
999 | if (!handle || !protocol || |
1000 | protocol_interface_type != EFI_NATIVE_INTERFACE) { | |
1001 | r = EFI_INVALID_PARAMETER; | |
1002 | goto out; | |
1003 | } | |
1004 | ||
1005 | /* Create new handle if requested. */ | |
1006 | if (!*handle) { | |
3cc6e3fe HS |
1007 | r = efi_create_handle(handle); |
1008 | if (r != EFI_SUCCESS) | |
1009 | goto out; | |
af1408e0 HS |
1010 | debug("%sEFI: new handle %p\n", indent_string(nesting_level), |
1011 | *handle); | |
1012 | } else { | |
1013 | debug("%sEFI: handle %p\n", indent_string(nesting_level), | |
1014 | *handle); | |
e0549f8a | 1015 | } |
1202530d HS |
1016 | /* Add new protocol */ |
1017 | r = efi_add_protocol(*handle, protocol, protocol_interface); | |
e0549f8a | 1018 | out: |
1760ef57 | 1019 | return EFI_EXIT(r); |
bee91169 | 1020 | } |
e0549f8a | 1021 | |
332468f7 HS |
1022 | /* |
1023 | * Reinstall protocol interface. | |
1024 | * | |
1025 | * This function implements the ReinstallProtocolInterface service. | |
1026 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1027 | * for details. | |
1028 | * | |
1029 | * @handle handle on which the protocol shall be | |
1030 | * reinstalled | |
1031 | * @protocol GUID of the protocol to be installed | |
1032 | * @old_interface interface to be removed | |
1033 | * @new_interface interface to be installed | |
1034 | * @return status code | |
1035 | */ | |
2074f700 HS |
1036 | static efi_status_t EFIAPI efi_reinstall_protocol_interface( |
1037 | efi_handle_t handle, const efi_guid_t *protocol, | |
1038 | void *old_interface, void *new_interface) | |
bee91169 | 1039 | { |
778e6af8 | 1040 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface, |
bee91169 AG |
1041 | new_interface); |
1042 | return EFI_EXIT(EFI_ACCESS_DENIED); | |
1043 | } | |
1044 | ||
3f9b0042 HS |
1045 | /* |
1046 | * Get all drivers associated to a controller. | |
1047 | * The allocated buffer has to be freed with free(). | |
1048 | * | |
1049 | * @efiobj handle of the controller | |
1050 | * @protocol protocol guid (optional) | |
1051 | * @number_of_drivers number of child controllers | |
1052 | * @driver_handle_buffer handles of the the drivers | |
1053 | * @return status code | |
1054 | */ | |
1055 | static efi_status_t efi_get_drivers(struct efi_object *efiobj, | |
1056 | const efi_guid_t *protocol, | |
1057 | efi_uintn_t *number_of_drivers, | |
1058 | efi_handle_t **driver_handle_buffer) | |
1059 | { | |
1060 | struct efi_handler *handler; | |
1061 | struct efi_open_protocol_info_item *item; | |
1062 | efi_uintn_t count = 0, i; | |
1063 | bool duplicate; | |
1064 | ||
1065 | /* Count all driver associations */ | |
1066 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
1067 | if (protocol && guidcmp(handler->guid, protocol)) | |
1068 | continue; | |
1069 | list_for_each_entry(item, &handler->open_infos, link) { | |
1070 | if (item->info.attributes & | |
1071 | EFI_OPEN_PROTOCOL_BY_DRIVER) | |
1072 | ++count; | |
1073 | } | |
1074 | } | |
1075 | /* | |
1076 | * Create buffer. In case of duplicate driver assignments the buffer | |
1077 | * will be too large. But that does not harm. | |
1078 | */ | |
1079 | *number_of_drivers = 0; | |
1080 | *driver_handle_buffer = calloc(count, sizeof(efi_handle_t)); | |
1081 | if (!*driver_handle_buffer) | |
1082 | return EFI_OUT_OF_RESOURCES; | |
1083 | /* Collect unique driver handles */ | |
1084 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
1085 | if (protocol && guidcmp(handler->guid, protocol)) | |
1086 | continue; | |
1087 | list_for_each_entry(item, &handler->open_infos, link) { | |
1088 | if (item->info.attributes & | |
1089 | EFI_OPEN_PROTOCOL_BY_DRIVER) { | |
1090 | /* Check this is a new driver */ | |
1091 | duplicate = false; | |
1092 | for (i = 0; i < *number_of_drivers; ++i) { | |
1093 | if ((*driver_handle_buffer)[i] == | |
1094 | item->info.agent_handle) | |
1095 | duplicate = true; | |
1096 | } | |
1097 | /* Copy handle to buffer */ | |
1098 | if (!duplicate) { | |
1099 | i = (*number_of_drivers)++; | |
1100 | (*driver_handle_buffer)[i] = | |
1101 | item->info.agent_handle; | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | return EFI_SUCCESS; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Disconnect all drivers from a controller. | |
1111 | * | |
1112 | * This function implements the DisconnectController service. | |
1113 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1114 | * for details. | |
1115 | * | |
1116 | * @efiobj handle of the controller | |
1117 | * @protocol protocol guid (optional) | |
1118 | * @child_handle handle of the child to destroy | |
1119 | * @return status code | |
1120 | */ | |
1121 | static efi_status_t efi_disconnect_all_drivers( | |
1122 | struct efi_object *efiobj, | |
1123 | const efi_guid_t *protocol, | |
1124 | efi_handle_t child_handle) | |
1125 | { | |
1126 | efi_uintn_t number_of_drivers; | |
1127 | efi_handle_t *driver_handle_buffer; | |
1128 | efi_status_t r, ret; | |
1129 | ||
1130 | ret = efi_get_drivers(efiobj, protocol, &number_of_drivers, | |
1131 | &driver_handle_buffer); | |
1132 | if (ret != EFI_SUCCESS) | |
1133 | return ret; | |
1134 | ||
1135 | ret = EFI_NOT_FOUND; | |
1136 | while (number_of_drivers) { | |
1137 | r = EFI_CALL(efi_disconnect_controller( | |
1138 | efiobj->handle, | |
1139 | driver_handle_buffer[--number_of_drivers], | |
1140 | child_handle)); | |
1141 | if (r == EFI_SUCCESS) | |
1142 | ret = r; | |
1143 | } | |
1144 | free(driver_handle_buffer); | |
1145 | return ret; | |
1146 | } | |
1147 | ||
332468f7 HS |
1148 | /* |
1149 | * Uninstall protocol interface. | |
1150 | * | |
cd534083 HS |
1151 | * This function implements the UninstallProtocolInterface service. |
1152 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1153 | * for details. | |
332468f7 HS |
1154 | * |
1155 | * @handle handle from which the protocol shall be removed | |
1156 | * @protocol GUID of the protocol to be removed | |
1157 | * @protocol_interface interface to be removed | |
1158 | * @return status code | |
1159 | */ | |
cd534083 | 1160 | static efi_status_t EFIAPI efi_uninstall_protocol_interface( |
2074f700 | 1161 | efi_handle_t handle, const efi_guid_t *protocol, |
cd534083 | 1162 | void *protocol_interface) |
bee91169 | 1163 | { |
ad97373b | 1164 | struct efi_object *efiobj; |
5810511d | 1165 | struct efi_handler *handler; |
ad97373b HS |
1166 | struct efi_open_protocol_info_item *item; |
1167 | struct efi_open_protocol_info_item *pos; | |
5810511d | 1168 | efi_status_t r; |
4b6ed0d7 | 1169 | |
cd534083 HS |
1170 | EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface); |
1171 | ||
ad97373b HS |
1172 | /* Check handle */ |
1173 | efiobj = efi_search_obj(handle); | |
1174 | if (!efiobj) { | |
4b6ed0d7 HS |
1175 | r = EFI_INVALID_PARAMETER; |
1176 | goto out; | |
1177 | } | |
5810511d HS |
1178 | /* Find the protocol on the handle */ |
1179 | r = efi_search_protocol(handle, protocol, &handler); | |
1180 | if (r != EFI_SUCCESS) | |
1181 | goto out; | |
ad97373b HS |
1182 | /* Disconnect controllers */ |
1183 | efi_disconnect_all_drivers(efiobj, protocol, NULL); | |
1184 | if (!list_empty(&handler->open_infos)) { | |
5810511d | 1185 | r = EFI_ACCESS_DENIED; |
ad97373b HS |
1186 | goto out; |
1187 | } | |
1188 | /* Close protocol */ | |
1189 | list_for_each_entry_safe(item, pos, &handler->open_infos, link) { | |
1190 | if (item->info.attributes == | |
1191 | EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL || | |
1192 | item->info.attributes == EFI_OPEN_PROTOCOL_GET_PROTOCOL || | |
1193 | item->info.attributes == EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
1194 | list_del(&item->link); | |
1195 | } | |
1196 | if (!list_empty(&handler->open_infos)) { | |
1197 | r = EFI_ACCESS_DENIED; | |
1198 | goto out; | |
4b6ed0d7 | 1199 | } |
ad97373b | 1200 | r = efi_remove_protocol(handle, protocol, protocol_interface); |
4b6ed0d7 | 1201 | out: |
cd534083 | 1202 | return EFI_EXIT(r); |
bee91169 AG |
1203 | } |
1204 | ||
332468f7 HS |
1205 | /* |
1206 | * Register an event for notification when a protocol is installed. | |
1207 | * | |
1208 | * This function implements the RegisterProtocolNotify service. | |
1209 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1210 | * for details. | |
1211 | * | |
1212 | * @protocol GUID of the protocol whose installation shall be | |
1213 | * notified | |
1214 | * @event event to be signaled upon installation of the protocol | |
1215 | * @registration key for retrieving the registration information | |
1216 | * @return status code | |
1217 | */ | |
5a9682d0 HS |
1218 | static efi_status_t EFIAPI efi_register_protocol_notify( |
1219 | const efi_guid_t *protocol, | |
1220 | struct efi_event *event, | |
1221 | void **registration) | |
bee91169 | 1222 | { |
778e6af8 | 1223 | EFI_ENTRY("%pUl, %p, %p", protocol, event, registration); |
bee91169 AG |
1224 | return EFI_EXIT(EFI_OUT_OF_RESOURCES); |
1225 | } | |
1226 | ||
332468f7 HS |
1227 | /* |
1228 | * Determine if an EFI handle implements a protocol. | |
1229 | * | |
1230 | * See the documentation of the LocateHandle service in the UEFI specification. | |
1231 | * | |
1232 | * @search_type selection criterion | |
1233 | * @protocol GUID of the protocol | |
1234 | * @search_key registration key | |
1235 | * @efiobj handle | |
1236 | * @return 0 if the handle implements the protocol | |
1237 | */ | |
bee91169 | 1238 | static int efi_search(enum efi_locate_search_type search_type, |
5a9682d0 | 1239 | const efi_guid_t *protocol, void *search_key, |
bee91169 AG |
1240 | struct efi_object *efiobj) |
1241 | { | |
42cf1242 | 1242 | efi_status_t ret; |
bee91169 AG |
1243 | |
1244 | switch (search_type) { | |
9f0770ff | 1245 | case ALL_HANDLES: |
bee91169 | 1246 | return 0; |
9f0770ff | 1247 | case BY_REGISTER_NOTIFY: |
42cf1242 | 1248 | /* TODO: RegisterProtocolNotify is not implemented yet */ |
bee91169 | 1249 | return -1; |
9f0770ff | 1250 | case BY_PROTOCOL: |
42cf1242 HS |
1251 | ret = efi_search_protocol(efiobj->handle, protocol, NULL); |
1252 | return (ret != EFI_SUCCESS); | |
1253 | default: | |
1254 | /* Invalid search type */ | |
bee91169 AG |
1255 | return -1; |
1256 | } | |
bee91169 AG |
1257 | } |
1258 | ||
332468f7 HS |
1259 | /* |
1260 | * Locate handles implementing a protocol. | |
1261 | * | |
1262 | * This function is meant for U-Boot internal calls. For the API implementation | |
1263 | * of the LocateHandle service see efi_locate_handle_ext. | |
1264 | * | |
1265 | * @search_type selection criterion | |
1266 | * @protocol GUID of the protocol | |
1267 | * @search_key registration key | |
1268 | * @buffer_size size of the buffer to receive the handles in bytes | |
1269 | * @buffer buffer to receive the relevant handles | |
1270 | * @return status code | |
1271 | */ | |
ebf199b9 | 1272 | static efi_status_t efi_locate_handle( |
bee91169 | 1273 | enum efi_locate_search_type search_type, |
5a9682d0 | 1274 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 1275 | efi_uintn_t *buffer_size, efi_handle_t *buffer) |
bee91169 | 1276 | { |
caf864e4 | 1277 | struct efi_object *efiobj; |
f5a2a938 | 1278 | efi_uintn_t size = 0; |
bee91169 | 1279 | |
caf864e4 HS |
1280 | /* Check parameters */ |
1281 | switch (search_type) { | |
1282 | case ALL_HANDLES: | |
1283 | break; | |
1284 | case BY_REGISTER_NOTIFY: | |
1285 | if (!search_key) | |
1286 | return EFI_INVALID_PARAMETER; | |
1287 | /* RegisterProtocolNotify is not implemented yet */ | |
1288 | return EFI_UNSUPPORTED; | |
1289 | case BY_PROTOCOL: | |
1290 | if (!protocol) | |
1291 | return EFI_INVALID_PARAMETER; | |
1292 | break; | |
1293 | default: | |
1294 | return EFI_INVALID_PARAMETER; | |
1295 | } | |
1296 | ||
1297 | /* | |
1298 | * efi_locate_handle_buffer uses this function for | |
1299 | * the calculation of the necessary buffer size. | |
1300 | * So do not require a buffer for buffersize == 0. | |
1301 | */ | |
1302 | if (!buffer_size || (*buffer_size && !buffer)) | |
1303 | return EFI_INVALID_PARAMETER; | |
1304 | ||
bee91169 | 1305 | /* Count how much space we need */ |
caf864e4 HS |
1306 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
1307 | if (!efi_search(search_type, protocol, search_key, efiobj)) | |
ab9efa97 | 1308 | size += sizeof(void *); |
bee91169 AG |
1309 | } |
1310 | ||
1311 | if (*buffer_size < size) { | |
1312 | *buffer_size = size; | |
26329584 | 1313 | return EFI_BUFFER_TOO_SMALL; |
bee91169 AG |
1314 | } |
1315 | ||
796a78cb RC |
1316 | *buffer_size = size; |
1317 | if (size == 0) | |
1318 | return EFI_NOT_FOUND; | |
1319 | ||
bee91169 | 1320 | /* Then fill the array */ |
caf864e4 HS |
1321 | list_for_each_entry(efiobj, &efi_obj_list, link) { |
1322 | if (!efi_search(search_type, protocol, search_key, efiobj)) | |
1323 | *buffer++ = efiobj->handle; | |
bee91169 AG |
1324 | } |
1325 | ||
26329584 HS |
1326 | return EFI_SUCCESS; |
1327 | } | |
1328 | ||
332468f7 HS |
1329 | /* |
1330 | * Locate handles implementing a protocol. | |
1331 | * | |
1332 | * This function implements the LocateHandle service. | |
1333 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1334 | * for details. | |
1335 | * | |
1336 | * @search_type selection criterion | |
1337 | * @protocol GUID of the protocol | |
1338 | * @search_key registration key | |
1339 | * @buffer_size size of the buffer to receive the handles in bytes | |
1340 | * @buffer buffer to receive the relevant handles | |
1341 | * @return 0 if the handle implements the protocol | |
1342 | */ | |
26329584 HS |
1343 | static efi_status_t EFIAPI efi_locate_handle_ext( |
1344 | enum efi_locate_search_type search_type, | |
5a9682d0 | 1345 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 1346 | efi_uintn_t *buffer_size, efi_handle_t *buffer) |
26329584 | 1347 | { |
778e6af8 | 1348 | EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, |
26329584 HS |
1349 | buffer_size, buffer); |
1350 | ||
1351 | return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key, | |
1352 | buffer_size, buffer)); | |
bee91169 AG |
1353 | } |
1354 | ||
d98cdf6a AG |
1355 | /* Collapses configuration table entries, removing index i */ |
1356 | static void efi_remove_configuration_table(int i) | |
1357 | { | |
1358 | struct efi_configuration_table *this = &efi_conf_table[i]; | |
ab9efa97 | 1359 | struct efi_configuration_table *next = &efi_conf_table[i + 1]; |
d98cdf6a AG |
1360 | struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables]; |
1361 | ||
1362 | memmove(this, next, (ulong)end - (ulong)next); | |
1363 | systab.nr_tables--; | |
1364 | } | |
1365 | ||
332468f7 HS |
1366 | /* |
1367 | * Adds, updates, or removes a configuration table. | |
1368 | * | |
1369 | * This function is used for internal calls. For the API implementation of the | |
1370 | * InstallConfigurationTable service see efi_install_configuration_table_ext. | |
1371 | * | |
1372 | * @guid GUID of the installed table | |
1373 | * @table table to be installed | |
1374 | * @return status code | |
1375 | */ | |
ab9efa97 HS |
1376 | efi_status_t efi_install_configuration_table(const efi_guid_t *guid, |
1377 | void *table) | |
bee91169 | 1378 | { |
b095f3c8 | 1379 | struct efi_event *evt; |
bee91169 AG |
1380 | int i; |
1381 | ||
eb68b4ef HS |
1382 | if (!guid) |
1383 | return EFI_INVALID_PARAMETER; | |
1384 | ||
bee91169 AG |
1385 | /* Check for guid override */ |
1386 | for (i = 0; i < systab.nr_tables; i++) { | |
1387 | if (!guidcmp(guid, &efi_conf_table[i].guid)) { | |
d98cdf6a AG |
1388 | if (table) |
1389 | efi_conf_table[i].table = table; | |
1390 | else | |
1391 | efi_remove_configuration_table(i); | |
b095f3c8 | 1392 | goto out; |
bee91169 AG |
1393 | } |
1394 | } | |
1395 | ||
d98cdf6a AG |
1396 | if (!table) |
1397 | return EFI_NOT_FOUND; | |
1398 | ||
bee91169 AG |
1399 | /* No override, check for overflow */ |
1400 | if (i >= ARRAY_SIZE(efi_conf_table)) | |
488bf12d | 1401 | return EFI_OUT_OF_RESOURCES; |
bee91169 AG |
1402 | |
1403 | /* Add a new entry */ | |
1404 | memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid)); | |
1405 | efi_conf_table[i].table = table; | |
aba5e919 | 1406 | systab.nr_tables = i + 1; |
bee91169 | 1407 | |
b095f3c8 HS |
1408 | out: |
1409 | /* Notify that the configuration table was changed */ | |
1410 | list_for_each_entry(evt, &efi_events, link) { | |
1411 | if (evt->group && !guidcmp(evt->group, guid)) { | |
1412 | efi_signal_event(evt, false); | |
1413 | break; | |
1414 | } | |
1415 | } | |
1416 | ||
488bf12d AG |
1417 | return EFI_SUCCESS; |
1418 | } | |
1419 | ||
332468f7 HS |
1420 | /* |
1421 | * Adds, updates, or removes a configuration table. | |
1422 | * | |
1423 | * This function implements the InstallConfigurationTable service. | |
1424 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1425 | * for details. | |
1426 | * | |
1427 | * @guid GUID of the installed table | |
1428 | * @table table to be installed | |
1429 | * @return status code | |
1430 | */ | |
488bf12d AG |
1431 | static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid, |
1432 | void *table) | |
1433 | { | |
778e6af8 | 1434 | EFI_ENTRY("%pUl, %p", guid, table); |
488bf12d | 1435 | return EFI_EXIT(efi_install_configuration_table(guid, table)); |
bee91169 AG |
1436 | } |
1437 | ||
332468f7 HS |
1438 | /* |
1439 | * Initialize a loaded_image_info + loaded_image_info object with correct | |
95c5553e | 1440 | * protocols, boot-device, etc. |
332468f7 | 1441 | * |
10a08c4e | 1442 | * @info loaded image info to be passed to the entry point of the |
332468f7 HS |
1443 | * image |
1444 | * @obj internal object associated with the loaded image | |
1445 | * @device_path device path of the loaded image | |
1446 | * @file_path file path of the loaded image | |
56d92888 | 1447 | * @return status code |
95c5553e | 1448 | */ |
56d92888 HS |
1449 | efi_status_t efi_setup_loaded_image( |
1450 | struct efi_loaded_image *info, struct efi_object *obj, | |
1451 | struct efi_device_path *device_path, | |
1452 | struct efi_device_path *file_path) | |
95c5553e | 1453 | { |
48b66230 HS |
1454 | efi_status_t ret; |
1455 | ||
44549d62 HS |
1456 | /* Add internal object to object list */ |
1457 | efi_add_handle(obj); | |
1458 | /* efi_exit() assumes that the handle points to the info */ | |
95c5553e RC |
1459 | obj->handle = info; |
1460 | ||
48b66230 | 1461 | info->file_path = file_path; |
48b66230 | 1462 | |
7df5af6f HS |
1463 | if (device_path) { |
1464 | info->device_handle = efi_dp_find_obj(device_path, NULL); | |
1465 | /* | |
1466 | * When asking for the device path interface, return | |
1467 | * bootefi_device_path | |
1468 | */ | |
1469 | ret = efi_add_protocol(obj->handle, &efi_guid_device_path, | |
1470 | device_path); | |
1471 | if (ret != EFI_SUCCESS) | |
1472 | goto failure; | |
1473 | } | |
95c5553e RC |
1474 | |
1475 | /* | |
1476 | * When asking for the loaded_image interface, just | |
1477 | * return handle which points to loaded_image_info | |
1478 | */ | |
48b66230 HS |
1479 | ret = efi_add_protocol(obj->handle, &efi_guid_loaded_image, info); |
1480 | if (ret != EFI_SUCCESS) | |
1481 | goto failure; | |
95c5553e | 1482 | |
48b66230 HS |
1483 | ret = efi_add_protocol(obj->handle, |
1484 | &efi_guid_device_path_to_text_protocol, | |
1485 | (void *)&efi_device_path_to_text); | |
1486 | if (ret != EFI_SUCCESS) | |
1487 | goto failure; | |
95c5553e | 1488 | |
e70f8dfa LL |
1489 | ret = efi_add_protocol(obj->handle, |
1490 | &efi_guid_device_path_utilities_protocol, | |
1491 | (void *)&efi_device_path_utilities); | |
1492 | if (ret != EFI_SUCCESS) | |
1493 | goto failure; | |
1494 | ||
56d92888 | 1495 | return ret; |
48b66230 HS |
1496 | failure: |
1497 | printf("ERROR: Failure to install protocols for loaded image\n"); | |
56d92888 | 1498 | return ret; |
95c5553e RC |
1499 | } |
1500 | ||
332468f7 HS |
1501 | /* |
1502 | * Load an image using a file path. | |
1503 | * | |
1504 | * @file_path the path of the image to load | |
1505 | * @buffer buffer containing the loaded image | |
10a08c4e | 1506 | * @return status code |
332468f7 | 1507 | */ |
9975fe96 RC |
1508 | efi_status_t efi_load_image_from_path(struct efi_device_path *file_path, |
1509 | void **buffer) | |
838ee4b4 RC |
1510 | { |
1511 | struct efi_file_info *info = NULL; | |
1512 | struct efi_file_handle *f; | |
1513 | static efi_status_t ret; | |
b6dd5777 | 1514 | efi_uintn_t bs; |
838ee4b4 RC |
1515 | |
1516 | f = efi_file_from_path(file_path); | |
1517 | if (!f) | |
1518 | return EFI_DEVICE_ERROR; | |
1519 | ||
1520 | bs = 0; | |
1521 | EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, | |
1522 | &bs, info)); | |
1523 | if (ret == EFI_BUFFER_TOO_SMALL) { | |
1524 | info = malloc(bs); | |
1525 | EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, | |
1526 | &bs, info)); | |
1527 | } | |
1528 | if (ret != EFI_SUCCESS) | |
1529 | goto error; | |
1530 | ||
1531 | ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer); | |
1532 | if (ret) | |
1533 | goto error; | |
1534 | ||
b6dd5777 HS |
1535 | bs = info->file_size; |
1536 | EFI_CALL(ret = f->read(f, &bs, *buffer)); | |
838ee4b4 RC |
1537 | |
1538 | error: | |
1539 | free(info); | |
1540 | EFI_CALL(f->close(f)); | |
1541 | ||
1542 | if (ret != EFI_SUCCESS) { | |
1543 | efi_free_pool(*buffer); | |
1544 | *buffer = NULL; | |
1545 | } | |
1546 | ||
1547 | return ret; | |
1548 | } | |
1549 | ||
332468f7 HS |
1550 | /* |
1551 | * Load an EFI image into memory. | |
1552 | * | |
1553 | * This function implements the LoadImage service. | |
1554 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1555 | * for details. | |
1556 | * | |
1557 | * @boot_policy true for request originating from the boot manager | |
c8df80c5 | 1558 | * @parent_image the caller's image handle |
332468f7 HS |
1559 | * @file_path the path of the image to load |
1560 | * @source_buffer memory location from which the image is installed | |
1561 | * @source_size size of the memory area from which the image is | |
1562 | * installed | |
1563 | * @image_handle handle for the newly installed image | |
1564 | * @return status code | |
1565 | */ | |
bee91169 AG |
1566 | static efi_status_t EFIAPI efi_load_image(bool boot_policy, |
1567 | efi_handle_t parent_image, | |
1568 | struct efi_device_path *file_path, | |
1569 | void *source_buffer, | |
7fb96a10 | 1570 | efi_uintn_t source_size, |
bee91169 AG |
1571 | efi_handle_t *image_handle) |
1572 | { | |
bee91169 AG |
1573 | struct efi_loaded_image *info; |
1574 | struct efi_object *obj; | |
b9b17598 | 1575 | efi_status_t ret; |
bee91169 | 1576 | |
7fb96a10 | 1577 | EFI_ENTRY("%d, %p, %pD, %p, %zd, %p", boot_policy, parent_image, |
bee91169 | 1578 | file_path, source_buffer, source_size, image_handle); |
838ee4b4 | 1579 | |
28a4fd46 HS |
1580 | if (!image_handle || !parent_image) { |
1581 | ret = EFI_INVALID_PARAMETER; | |
1582 | goto error; | |
1583 | } | |
1584 | ||
1585 | if (!source_buffer && !file_path) { | |
1586 | ret = EFI_NOT_FOUND; | |
1587 | goto error; | |
1588 | } | |
1589 | ||
838ee4b4 | 1590 | info = calloc(1, sizeof(*info)); |
28a4fd46 HS |
1591 | if (!info) { |
1592 | ret = EFI_OUT_OF_RESOURCES; | |
1593 | goto error; | |
1594 | } | |
838ee4b4 | 1595 | obj = calloc(1, sizeof(*obj)); |
28a4fd46 HS |
1596 | if (!obj) { |
1597 | free(info); | |
1598 | ret = EFI_OUT_OF_RESOURCES; | |
1599 | goto error; | |
1600 | } | |
838ee4b4 RC |
1601 | |
1602 | if (!source_buffer) { | |
1603 | struct efi_device_path *dp, *fp; | |
838ee4b4 | 1604 | |
9975fe96 | 1605 | ret = efi_load_image_from_path(file_path, &source_buffer); |
b9b17598 HS |
1606 | if (ret != EFI_SUCCESS) |
1607 | goto failure; | |
838ee4b4 RC |
1608 | /* |
1609 | * split file_path which contains both the device and | |
1610 | * file parts: | |
1611 | */ | |
1612 | efi_dp_split_file_path(file_path, &dp, &fp); | |
b9b17598 HS |
1613 | ret = efi_setup_loaded_image(info, obj, dp, fp); |
1614 | if (ret != EFI_SUCCESS) | |
1615 | goto failure; | |
838ee4b4 RC |
1616 | } else { |
1617 | /* In this case, file_path is the "device" path, ie. | |
1618 | * something like a HARDWARE_DEVICE:MEMORY_MAPPED | |
1619 | */ | |
b9b17598 HS |
1620 | ret = efi_setup_loaded_image(info, obj, file_path, NULL); |
1621 | if (ret != EFI_SUCCESS) | |
1622 | goto failure; | |
838ee4b4 | 1623 | } |
bee91169 AG |
1624 | info->reserved = efi_load_pe(source_buffer, info); |
1625 | if (!info->reserved) { | |
b9b17598 HS |
1626 | ret = EFI_UNSUPPORTED; |
1627 | goto failure; | |
bee91169 | 1628 | } |
32fc2ac3 HS |
1629 | info->system_table = &systab; |
1630 | info->parent_handle = parent_image; | |
ea54ad59 | 1631 | *image_handle = obj->handle; |
bee91169 | 1632 | return EFI_EXIT(EFI_SUCCESS); |
b9b17598 HS |
1633 | failure: |
1634 | free(info); | |
1635 | efi_delete_handle(obj); | |
28a4fd46 | 1636 | error: |
b9b17598 | 1637 | return EFI_EXIT(ret); |
bee91169 AG |
1638 | } |
1639 | ||
332468f7 HS |
1640 | /* |
1641 | * Call the entry point of an image. | |
1642 | * | |
1643 | * This function implements the StartImage service. | |
1644 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1645 | * for details. | |
1646 | * | |
1647 | * @image_handle handle of the image | |
1648 | * @exit_data_size size of the buffer | |
1649 | * @exit_data buffer to receive the exit data of the called image | |
10a08c4e | 1650 | * @return status code |
332468f7 | 1651 | */ |
bee91169 AG |
1652 | static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, |
1653 | unsigned long *exit_data_size, | |
1654 | s16 **exit_data) | |
1655 | { | |
c6fa5df6 AG |
1656 | EFIAPI efi_status_t (*entry)(efi_handle_t image_handle, |
1657 | struct efi_system_table *st); | |
bee91169 | 1658 | struct efi_loaded_image *info = image_handle; |
727a1afb | 1659 | efi_status_t ret; |
bee91169 AG |
1660 | |
1661 | EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data); | |
1662 | entry = info->reserved; | |
1663 | ||
1664 | efi_is_direct_boot = false; | |
1665 | ||
1666 | /* call the image! */ | |
a86aeaf2 | 1667 | if (setjmp(&info->exit_jmp)) { |
727a1afb HS |
1668 | /* |
1669 | * We called the entry point of the child image with EFI_CALL | |
1670 | * in the lines below. The child image called the Exit() boot | |
1671 | * service efi_exit() which executed the long jump that brought | |
1672 | * us to the current line. This implies that the second half | |
1673 | * of the EFI_CALL macro has not been executed. | |
1674 | */ | |
1675 | #ifdef CONFIG_ARM | |
1676 | /* | |
1677 | * efi_exit() called efi_restore_gd(). We have to undo this | |
1678 | * otherwise __efi_entry_check() will put the wrong value into | |
1679 | * app_gd. | |
1680 | */ | |
1681 | gd = app_gd; | |
1682 | #endif | |
1683 | /* | |
1684 | * To get ready to call EFI_EXIT below we have to execute the | |
1685 | * missed out steps of EFI_CALL. | |
1686 | */ | |
1687 | assert(__efi_entry_check()); | |
1688 | debug("%sEFI: %lu returned by started image\n", | |
1689 | __efi_nesting_dec(), | |
1690 | (unsigned long)((uintptr_t)info->exit_status & | |
1691 | ~EFI_ERROR_MASK)); | |
a86aeaf2 AG |
1692 | return EFI_EXIT(info->exit_status); |
1693 | } | |
1694 | ||
727a1afb | 1695 | ret = EFI_CALL(entry(image_handle, &systab)); |
bee91169 | 1696 | |
56672bf5 AG |
1697 | /* |
1698 | * Usually UEFI applications call Exit() instead of returning. | |
1699 | * But because the world doesn not consist of ponies and unicorns, | |
1700 | * we're happy to emulate that behavior on behalf of a payload | |
1701 | * that forgot. | |
1702 | */ | |
1703 | return EFI_CALL(systab.boottime->exit(image_handle, ret, 0, NULL)); | |
bee91169 AG |
1704 | } |
1705 | ||
332468f7 HS |
1706 | /* |
1707 | * Leave an EFI application or driver. | |
1708 | * | |
1709 | * This function implements the Exit service. | |
1710 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1711 | * for details. | |
1712 | * | |
1713 | * @image_handle handle of the application or driver that is exiting | |
1714 | * @exit_status status code | |
1715 | * @exit_data_size size of the buffer in bytes | |
1716 | * @exit_data buffer with data describing an error | |
10a08c4e | 1717 | * @return status code |
332468f7 | 1718 | */ |
a86aeaf2 | 1719 | static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle, |
ab9efa97 HS |
1720 | efi_status_t exit_status, |
1721 | unsigned long exit_data_size, | |
1722 | int16_t *exit_data) | |
bee91169 | 1723 | { |
44549d62 HS |
1724 | /* |
1725 | * We require that the handle points to the original loaded | |
1726 | * image protocol interface. | |
1727 | * | |
1728 | * For getting the longjmp address this is safer than locating | |
1729 | * the protocol because the protocol may have been reinstalled | |
1730 | * pointing to another memory location. | |
1731 | * | |
1732 | * TODO: We should call the unload procedure of the loaded | |
1733 | * image protocol. | |
1734 | */ | |
ab9efa97 | 1735 | struct efi_loaded_image *loaded_image_info = (void *)image_handle; |
a86aeaf2 | 1736 | |
bee91169 AG |
1737 | EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status, |
1738 | exit_data_size, exit_data); | |
a86aeaf2 | 1739 | |
a148920e | 1740 | /* Make sure entry/exit counts for EFI world cross-overs match */ |
727a1afb | 1741 | EFI_EXIT(exit_status); |
da94073b | 1742 | |
a148920e AG |
1743 | /* |
1744 | * But longjmp out with the U-Boot gd, not the application's, as | |
1745 | * the other end is a setjmp call inside EFI context. | |
1746 | */ | |
1747 | efi_restore_gd(); | |
1748 | ||
a86aeaf2 | 1749 | loaded_image_info->exit_status = exit_status; |
692fcdd8 | 1750 | longjmp(&loaded_image_info->exit_jmp, 1); |
a86aeaf2 AG |
1751 | |
1752 | panic("EFI application exited"); | |
bee91169 AG |
1753 | } |
1754 | ||
332468f7 HS |
1755 | /* |
1756 | * Unload an EFI image. | |
1757 | * | |
1758 | * This function implements the UnloadImage service. | |
1759 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1760 | * for details. | |
1761 | * | |
1762 | * @image_handle handle of the image to be unloaded | |
1763 | * @return status code | |
1764 | */ | |
2074f700 | 1765 | static efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle) |
bee91169 AG |
1766 | { |
1767 | struct efi_object *efiobj; | |
1768 | ||
1769 | EFI_ENTRY("%p", image_handle); | |
1770 | efiobj = efi_search_obj(image_handle); | |
1771 | if (efiobj) | |
1772 | list_del(&efiobj->link); | |
1773 | ||
1774 | return EFI_EXIT(EFI_SUCCESS); | |
1775 | } | |
1776 | ||
332468f7 HS |
1777 | /* |
1778 | * Fix up caches for EFI payloads if necessary. | |
1779 | */ | |
bee91169 AG |
1780 | static void efi_exit_caches(void) |
1781 | { | |
1782 | #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64) | |
1783 | /* | |
1784 | * Grub on 32bit ARM needs to have caches disabled before jumping into | |
1785 | * a zImage, but does not know of all cache layers. Give it a hand. | |
1786 | */ | |
1787 | if (efi_is_direct_boot) | |
1788 | cleanup_before_linux(); | |
1789 | #endif | |
1790 | } | |
1791 | ||
332468f7 | 1792 | /* |
cc20ed03 | 1793 | * Stop all boot services. |
332468f7 HS |
1794 | * |
1795 | * This function implements the ExitBootServices service. | |
1796 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1797 | * for details. | |
1798 | * | |
cc20ed03 HS |
1799 | * All timer events are disabled. |
1800 | * For exit boot services events the notification function is called. | |
1801 | * The boot services are disabled in the system table. | |
1802 | * | |
332468f7 HS |
1803 | * @image_handle handle of the loaded image |
1804 | * @map_key key of the memory map | |
1805 | * @return status code | |
1806 | */ | |
2074f700 | 1807 | static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, |
bee91169 AG |
1808 | unsigned long map_key) |
1809 | { | |
43bce442 | 1810 | struct efi_event *evt; |
152a263c | 1811 | |
bee91169 AG |
1812 | EFI_ENTRY("%p, %ld", image_handle, map_key); |
1813 | ||
cc20ed03 HS |
1814 | /* Make sure that notification functions are not called anymore */ |
1815 | efi_tpl = TPL_HIGH_LEVEL; | |
1816 | ||
1817 | /* Check if ExitBootServices has already been called */ | |
1818 | if (!systab.boottime) | |
1819 | return EFI_EXIT(EFI_SUCCESS); | |
1820 | ||
b095f3c8 HS |
1821 | /* Add related events to the event group */ |
1822 | list_for_each_entry(evt, &efi_events, link) { | |
1823 | if (evt->type == EVT_SIGNAL_EXIT_BOOT_SERVICES) | |
1824 | evt->group = &efi_guid_event_group_exit_boot_services; | |
1825 | } | |
152a263c | 1826 | /* Notify that ExitBootServices is invoked. */ |
43bce442 | 1827 | list_for_each_entry(evt, &efi_events, link) { |
b095f3c8 HS |
1828 | if (evt->group && |
1829 | !guidcmp(evt->group, | |
1830 | &efi_guid_event_group_exit_boot_services)) { | |
1831 | efi_signal_event(evt, false); | |
1832 | break; | |
1833 | } | |
152a263c | 1834 | } |
152a263c | 1835 | |
cc20ed03 | 1836 | /* TODO Should persist EFI variables here */ |
ad644e7c | 1837 | |
b7b8410a AG |
1838 | board_quiesce_devices(); |
1839 | ||
bee91169 AG |
1840 | /* Fix up caches for EFI payloads if necessary */ |
1841 | efi_exit_caches(); | |
1842 | ||
1843 | /* This stops all lingering devices */ | |
1844 | bootm_disable_interrupts(); | |
1845 | ||
cc20ed03 HS |
1846 | /* Disable boottime services */ |
1847 | systab.con_in_handle = NULL; | |
1848 | systab.con_in = NULL; | |
1849 | systab.con_out_handle = NULL; | |
1850 | systab.con_out = NULL; | |
1851 | systab.stderr_handle = NULL; | |
1852 | systab.std_err = NULL; | |
1853 | systab.boottime = NULL; | |
1854 | ||
1855 | /* Recalculate CRC32 */ | |
1856 | systab.hdr.crc32 = 0; | |
1857 | systab.hdr.crc32 = crc32(0, (const unsigned char *)&systab, | |
1858 | sizeof(struct efi_system_table)); | |
1859 | ||
bee91169 | 1860 | /* Give the payload some time to boot */ |
b3d60900 | 1861 | efi_set_watchdog(0); |
bee91169 AG |
1862 | WATCHDOG_RESET(); |
1863 | ||
1864 | return EFI_EXIT(EFI_SUCCESS); | |
1865 | } | |
1866 | ||
332468f7 HS |
1867 | /* |
1868 | * Get next value of the counter. | |
1869 | * | |
1870 | * This function implements the NextMonotonicCount service. | |
1871 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1872 | * for details. | |
1873 | * | |
1874 | * @count returned value of the counter | |
1875 | * @return status code | |
1876 | */ | |
bee91169 AG |
1877 | static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count) |
1878 | { | |
ab9efa97 HS |
1879 | static uint64_t mono; |
1880 | ||
bee91169 AG |
1881 | EFI_ENTRY("%p", count); |
1882 | *count = mono++; | |
1883 | return EFI_EXIT(EFI_SUCCESS); | |
1884 | } | |
1885 | ||
332468f7 HS |
1886 | /* |
1887 | * Sleep. | |
1888 | * | |
1889 | * This function implements the Stall sercive. | |
1890 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1891 | * for details. | |
1892 | * | |
1893 | * @microseconds period to sleep in microseconds | |
1894 | * @return status code | |
1895 | */ | |
bee91169 AG |
1896 | static efi_status_t EFIAPI efi_stall(unsigned long microseconds) |
1897 | { | |
1898 | EFI_ENTRY("%ld", microseconds); | |
1899 | udelay(microseconds); | |
1900 | return EFI_EXIT(EFI_SUCCESS); | |
1901 | } | |
1902 | ||
332468f7 HS |
1903 | /* |
1904 | * Reset the watchdog timer. | |
1905 | * | |
b3d60900 | 1906 | * This function implements the SetWatchdogTimer service. |
332468f7 HS |
1907 | * See the Unified Extensible Firmware Interface (UEFI) specification |
1908 | * for details. | |
1909 | * | |
1910 | * @timeout seconds before reset by watchdog | |
1911 | * @watchdog_code code to be logged when resetting | |
1912 | * @data_size size of buffer in bytes | |
1913 | * @watchdog_data buffer with data describing the reset reason | |
10a08c4e | 1914 | * @return status code |
332468f7 | 1915 | */ |
bee91169 AG |
1916 | static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout, |
1917 | uint64_t watchdog_code, | |
1918 | unsigned long data_size, | |
1919 | uint16_t *watchdog_data) | |
1920 | { | |
ab9efa97 | 1921 | EFI_ENTRY("%ld, 0x%" PRIx64 ", %ld, %p", timeout, watchdog_code, |
bee91169 | 1922 | data_size, watchdog_data); |
b3d60900 | 1923 | return EFI_EXIT(efi_set_watchdog(timeout)); |
bee91169 AG |
1924 | } |
1925 | ||
332468f7 HS |
1926 | /* |
1927 | * Close a protocol. | |
1928 | * | |
1929 | * This function implements the CloseProtocol service. | |
1930 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1931 | * for details. | |
1932 | * | |
1933 | * @handle handle on which the protocol shall be closed | |
1934 | * @protocol GUID of the protocol to close | |
1935 | * @agent_handle handle of the driver | |
1936 | * @controller_handle handle of the controller | |
1937 | * @return status code | |
1938 | */ | |
2074f700 | 1939 | static efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle, |
5a9682d0 | 1940 | const efi_guid_t *protocol, |
2074f700 HS |
1941 | efi_handle_t agent_handle, |
1942 | efi_handle_t controller_handle) | |
bee91169 | 1943 | { |
3b8a489c HS |
1944 | struct efi_handler *handler; |
1945 | struct efi_open_protocol_info_item *item; | |
1946 | struct efi_open_protocol_info_item *pos; | |
1947 | efi_status_t r; | |
1948 | ||
778e6af8 | 1949 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle, |
bee91169 | 1950 | controller_handle); |
3b8a489c HS |
1951 | |
1952 | if (!agent_handle) { | |
1953 | r = EFI_INVALID_PARAMETER; | |
1954 | goto out; | |
1955 | } | |
1956 | r = efi_search_protocol(handle, protocol, &handler); | |
1957 | if (r != EFI_SUCCESS) | |
1958 | goto out; | |
1959 | ||
1960 | r = EFI_NOT_FOUND; | |
1961 | list_for_each_entry_safe(item, pos, &handler->open_infos, link) { | |
1962 | if (item->info.agent_handle == agent_handle && | |
1963 | item->info.controller_handle == controller_handle) { | |
1964 | efi_delete_open_info(item); | |
1965 | r = EFI_SUCCESS; | |
1966 | break; | |
1967 | } | |
1968 | } | |
1969 | out: | |
1970 | return EFI_EXIT(r); | |
bee91169 AG |
1971 | } |
1972 | ||
332468f7 HS |
1973 | /* |
1974 | * Provide information about then open status of a protocol on a handle | |
1975 | * | |
1976 | * This function implements the OpenProtocolInformation service. | |
1977 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
1978 | * for details. | |
1979 | * | |
1980 | * @handle handle for which the information shall be retrieved | |
1981 | * @protocol GUID of the protocol | |
1982 | * @entry_buffer buffer to receive the open protocol information | |
1983 | * @entry_count number of entries available in the buffer | |
1984 | * @return status code | |
1985 | */ | |
ab9efa97 HS |
1986 | static efi_status_t EFIAPI efi_open_protocol_information( |
1987 | efi_handle_t handle, const efi_guid_t *protocol, | |
bee91169 | 1988 | struct efi_open_protocol_info_entry **entry_buffer, |
f5a2a938 | 1989 | efi_uintn_t *entry_count) |
bee91169 | 1990 | { |
e3fbbc36 HS |
1991 | unsigned long buffer_size; |
1992 | unsigned long count; | |
1993 | struct efi_handler *handler; | |
1994 | struct efi_open_protocol_info_item *item; | |
1995 | efi_status_t r; | |
1996 | ||
778e6af8 | 1997 | EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer, |
bee91169 | 1998 | entry_count); |
e3fbbc36 HS |
1999 | |
2000 | /* Check parameters */ | |
2001 | if (!entry_buffer) { | |
2002 | r = EFI_INVALID_PARAMETER; | |
2003 | goto out; | |
2004 | } | |
2005 | r = efi_search_protocol(handle, protocol, &handler); | |
2006 | if (r != EFI_SUCCESS) | |
2007 | goto out; | |
2008 | ||
2009 | /* Count entries */ | |
2010 | count = 0; | |
2011 | list_for_each_entry(item, &handler->open_infos, link) { | |
2012 | if (item->info.open_count) | |
2013 | ++count; | |
2014 | } | |
2015 | *entry_count = count; | |
2016 | *entry_buffer = NULL; | |
2017 | if (!count) { | |
2018 | r = EFI_SUCCESS; | |
2019 | goto out; | |
2020 | } | |
2021 | ||
2022 | /* Copy entries */ | |
2023 | buffer_size = count * sizeof(struct efi_open_protocol_info_entry); | |
2024 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
2025 | (void **)entry_buffer); | |
2026 | if (r != EFI_SUCCESS) | |
2027 | goto out; | |
2028 | list_for_each_entry_reverse(item, &handler->open_infos, link) { | |
2029 | if (item->info.open_count) | |
2030 | (*entry_buffer)[--count] = item->info; | |
2031 | } | |
2032 | out: | |
2033 | return EFI_EXIT(r); | |
bee91169 AG |
2034 | } |
2035 | ||
332468f7 HS |
2036 | /* |
2037 | * Get protocols installed on a handle. | |
2038 | * | |
2039 | * This function implements the ProtocolsPerHandleService. | |
2040 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2041 | * for details. | |
2042 | * | |
2043 | * @handle handle for which the information is retrieved | |
2044 | * @protocol_buffer buffer with protocol GUIDs | |
2045 | * @protocol_buffer_count number of entries in the buffer | |
10a08c4e | 2046 | * @return status code |
332468f7 | 2047 | */ |
2074f700 HS |
2048 | static efi_status_t EFIAPI efi_protocols_per_handle( |
2049 | efi_handle_t handle, efi_guid_t ***protocol_buffer, | |
f5a2a938 | 2050 | efi_uintn_t *protocol_buffer_count) |
bee91169 | 2051 | { |
c0ebfc86 HS |
2052 | unsigned long buffer_size; |
2053 | struct efi_object *efiobj; | |
69fb6b1a | 2054 | struct list_head *protocol_handle; |
c0ebfc86 HS |
2055 | efi_status_t r; |
2056 | ||
bee91169 AG |
2057 | EFI_ENTRY("%p, %p, %p", handle, protocol_buffer, |
2058 | protocol_buffer_count); | |
c0ebfc86 HS |
2059 | |
2060 | if (!handle || !protocol_buffer || !protocol_buffer_count) | |
2061 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2062 | ||
2063 | *protocol_buffer = NULL; | |
661c8327 | 2064 | *protocol_buffer_count = 0; |
c0ebfc86 | 2065 | |
69fb6b1a HS |
2066 | efiobj = efi_search_obj(handle); |
2067 | if (!efiobj) | |
2068 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
c0ebfc86 | 2069 | |
69fb6b1a HS |
2070 | /* Count protocols */ |
2071 | list_for_each(protocol_handle, &efiobj->protocols) { | |
2072 | ++*protocol_buffer_count; | |
2073 | } | |
2074 | ||
2075 | /* Copy guids */ | |
2076 | if (*protocol_buffer_count) { | |
2077 | size_t j = 0; | |
2078 | ||
2079 | buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count; | |
2080 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
2081 | (void **)protocol_buffer); | |
2082 | if (r != EFI_SUCCESS) | |
2083 | return EFI_EXIT(r); | |
2084 | list_for_each(protocol_handle, &efiobj->protocols) { | |
2085 | struct efi_handler *protocol; | |
2086 | ||
2087 | protocol = list_entry(protocol_handle, | |
2088 | struct efi_handler, link); | |
2089 | (*protocol_buffer)[j] = (void *)protocol->guid; | |
2090 | ++j; | |
c0ebfc86 | 2091 | } |
c0ebfc86 HS |
2092 | } |
2093 | ||
2094 | return EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
2095 | } |
2096 | ||
332468f7 HS |
2097 | /* |
2098 | * Locate handles implementing a protocol. | |
2099 | * | |
2100 | * This function implements the LocateHandleBuffer service. | |
2101 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2102 | * for details. | |
2103 | * | |
2104 | * @search_type selection criterion | |
2105 | * @protocol GUID of the protocol | |
2106 | * @search_key registration key | |
2107 | * @no_handles number of returned handles | |
2108 | * @buffer buffer with the returned handles | |
2109 | * @return status code | |
2110 | */ | |
bee91169 AG |
2111 | static efi_status_t EFIAPI efi_locate_handle_buffer( |
2112 | enum efi_locate_search_type search_type, | |
5a9682d0 | 2113 | const efi_guid_t *protocol, void *search_key, |
f5a2a938 | 2114 | efi_uintn_t *no_handles, efi_handle_t **buffer) |
bee91169 | 2115 | { |
c2e703f9 | 2116 | efi_status_t r; |
f5a2a938 | 2117 | efi_uintn_t buffer_size = 0; |
c2e703f9 | 2118 | |
778e6af8 | 2119 | EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, |
bee91169 | 2120 | no_handles, buffer); |
c2e703f9 HS |
2121 | |
2122 | if (!no_handles || !buffer) { | |
2123 | r = EFI_INVALID_PARAMETER; | |
2124 | goto out; | |
2125 | } | |
2126 | *no_handles = 0; | |
2127 | *buffer = NULL; | |
2128 | r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, | |
2129 | *buffer); | |
2130 | if (r != EFI_BUFFER_TOO_SMALL) | |
2131 | goto out; | |
2132 | r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, | |
2133 | (void **)buffer); | |
2134 | if (r != EFI_SUCCESS) | |
2135 | goto out; | |
2136 | r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, | |
2137 | *buffer); | |
2138 | if (r == EFI_SUCCESS) | |
2074f700 | 2139 | *no_handles = buffer_size / sizeof(efi_handle_t); |
c2e703f9 HS |
2140 | out: |
2141 | return EFI_EXIT(r); | |
bee91169 AG |
2142 | } |
2143 | ||
332468f7 HS |
2144 | /* |
2145 | * Find an interface implementing a protocol. | |
2146 | * | |
2147 | * This function implements the LocateProtocol service. | |
2148 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2149 | * for details. | |
2150 | * | |
2151 | * @protocol GUID of the protocol | |
2152 | * @registration registration key passed to the notification function | |
2153 | * @protocol_interface interface implementing the protocol | |
10a08c4e | 2154 | * @return status code |
332468f7 | 2155 | */ |
5a9682d0 | 2156 | static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol, |
bee91169 AG |
2157 | void *registration, |
2158 | void **protocol_interface) | |
2159 | { | |
88adae5e | 2160 | struct list_head *lhandle; |
9172cd91 | 2161 | efi_status_t ret; |
bee91169 | 2162 | |
778e6af8 | 2163 | EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface); |
88adae5e HS |
2164 | |
2165 | if (!protocol || !protocol_interface) | |
2166 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2167 | ||
2168 | list_for_each(lhandle, &efi_obj_list) { | |
2169 | struct efi_object *efiobj; | |
9172cd91 | 2170 | struct efi_handler *handler; |
88adae5e HS |
2171 | |
2172 | efiobj = list_entry(lhandle, struct efi_object, link); | |
9172cd91 HS |
2173 | |
2174 | ret = efi_search_protocol(efiobj->handle, protocol, &handler); | |
2175 | if (ret == EFI_SUCCESS) { | |
2176 | *protocol_interface = handler->protocol_interface; | |
2177 | return EFI_EXIT(EFI_SUCCESS); | |
bee91169 AG |
2178 | } |
2179 | } | |
88adae5e | 2180 | *protocol_interface = NULL; |
bee91169 AG |
2181 | |
2182 | return EFI_EXIT(EFI_NOT_FOUND); | |
2183 | } | |
2184 | ||
ae2c85c1 HS |
2185 | /* |
2186 | * Get the device path and handle of an device implementing a protocol. | |
2187 | * | |
2188 | * This function implements the LocateDevicePath service. | |
2189 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2190 | * for details. | |
2191 | * | |
2192 | * @protocol GUID of the protocol | |
2193 | * @device_path device path | |
2194 | * @device handle of the device | |
2195 | * @return status code | |
2196 | */ | |
2197 | static efi_status_t EFIAPI efi_locate_device_path( | |
2198 | const efi_guid_t *protocol, | |
2199 | struct efi_device_path **device_path, | |
2200 | efi_handle_t *device) | |
2201 | { | |
2202 | struct efi_device_path *dp; | |
2203 | size_t i; | |
2204 | struct efi_handler *handler; | |
2205 | efi_handle_t *handles; | |
2206 | size_t len, len_dp; | |
2207 | size_t len_best = 0; | |
2208 | efi_uintn_t no_handles; | |
2209 | u8 *remainder; | |
2210 | efi_status_t ret; | |
2211 | ||
2212 | EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device); | |
2213 | ||
2214 | if (!protocol || !device_path || !*device_path || !device) { | |
2215 | ret = EFI_INVALID_PARAMETER; | |
2216 | goto out; | |
2217 | } | |
2218 | ||
2219 | /* Find end of device path */ | |
f6dd3f35 | 2220 | len = efi_dp_instance_size(*device_path); |
ae2c85c1 HS |
2221 | |
2222 | /* Get all handles implementing the protocol */ | |
2223 | ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL, | |
2224 | &no_handles, &handles)); | |
2225 | if (ret != EFI_SUCCESS) | |
2226 | goto out; | |
2227 | ||
2228 | for (i = 0; i < no_handles; ++i) { | |
2229 | /* Find the device path protocol */ | |
2230 | ret = efi_search_protocol(handles[i], &efi_guid_device_path, | |
2231 | &handler); | |
2232 | if (ret != EFI_SUCCESS) | |
2233 | continue; | |
2234 | dp = (struct efi_device_path *)handler->protocol_interface; | |
f6dd3f35 | 2235 | len_dp = efi_dp_instance_size(dp); |
ae2c85c1 HS |
2236 | /* |
2237 | * This handle can only be a better fit | |
2238 | * if its device path length is longer than the best fit and | |
2239 | * if its device path length is shorter of equal the searched | |
2240 | * device path. | |
2241 | */ | |
2242 | if (len_dp <= len_best || len_dp > len) | |
2243 | continue; | |
2244 | /* Check if dp is a subpath of device_path */ | |
2245 | if (memcmp(*device_path, dp, len_dp)) | |
2246 | continue; | |
2247 | *device = handles[i]; | |
2248 | len_best = len_dp; | |
2249 | } | |
2250 | if (len_best) { | |
2251 | remainder = (u8 *)*device_path + len_best; | |
2252 | *device_path = (struct efi_device_path *)remainder; | |
2253 | ret = EFI_SUCCESS; | |
2254 | } else { | |
2255 | ret = EFI_NOT_FOUND; | |
2256 | } | |
2257 | out: | |
2258 | return EFI_EXIT(ret); | |
2259 | } | |
2260 | ||
332468f7 HS |
2261 | /* |
2262 | * Install multiple protocol interfaces. | |
2263 | * | |
2264 | * This function implements the MultipleProtocolInterfaces service. | |
2265 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2266 | * for details. | |
2267 | * | |
2268 | * @handle handle on which the protocol interfaces shall be installed | |
2269 | * @... NULL terminated argument list with pairs of protocol GUIDS and | |
2270 | * interfaces | |
2271 | * @return status code | |
2272 | */ | |
bee91169 AG |
2273 | static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces( |
2274 | void **handle, ...) | |
2275 | { | |
2276 | EFI_ENTRY("%p", handle); | |
58b83586 HS |
2277 | |
2278 | va_list argptr; | |
5a9682d0 | 2279 | const efi_guid_t *protocol; |
58b83586 HS |
2280 | void *protocol_interface; |
2281 | efi_status_t r = EFI_SUCCESS; | |
2282 | int i = 0; | |
2283 | ||
2284 | if (!handle) | |
2285 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2286 | ||
2287 | va_start(argptr, handle); | |
2288 | for (;;) { | |
2289 | protocol = va_arg(argptr, efi_guid_t*); | |
2290 | if (!protocol) | |
2291 | break; | |
2292 | protocol_interface = va_arg(argptr, void*); | |
1760ef57 HS |
2293 | r = EFI_CALL(efi_install_protocol_interface( |
2294 | handle, protocol, | |
2295 | EFI_NATIVE_INTERFACE, | |
2296 | protocol_interface)); | |
58b83586 HS |
2297 | if (r != EFI_SUCCESS) |
2298 | break; | |
2299 | i++; | |
2300 | } | |
2301 | va_end(argptr); | |
2302 | if (r == EFI_SUCCESS) | |
2303 | return EFI_EXIT(r); | |
2304 | ||
62471e46 | 2305 | /* If an error occurred undo all changes. */ |
58b83586 HS |
2306 | va_start(argptr, handle); |
2307 | for (; i; --i) { | |
2308 | protocol = va_arg(argptr, efi_guid_t*); | |
2309 | protocol_interface = va_arg(argptr, void*); | |
cd534083 HS |
2310 | EFI_CALL(efi_uninstall_protocol_interface(handle, protocol, |
2311 | protocol_interface)); | |
58b83586 HS |
2312 | } |
2313 | va_end(argptr); | |
2314 | ||
2315 | return EFI_EXIT(r); | |
bee91169 AG |
2316 | } |
2317 | ||
332468f7 HS |
2318 | /* |
2319 | * Uninstall multiple protocol interfaces. | |
2320 | * | |
2321 | * This function implements the UninstallMultipleProtocolInterfaces service. | |
2322 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2323 | * for details. | |
2324 | * | |
2325 | * @handle handle from which the protocol interfaces shall be removed | |
2326 | * @... NULL terminated argument list with pairs of protocol GUIDS and | |
2327 | * interfaces | |
2328 | * @return status code | |
2329 | */ | |
bee91169 AG |
2330 | static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces( |
2331 | void *handle, ...) | |
2332 | { | |
2333 | EFI_ENTRY("%p", handle); | |
843ce54c HS |
2334 | |
2335 | va_list argptr; | |
2336 | const efi_guid_t *protocol; | |
2337 | void *protocol_interface; | |
2338 | efi_status_t r = EFI_SUCCESS; | |
2339 | size_t i = 0; | |
2340 | ||
2341 | if (!handle) | |
2342 | return EFI_EXIT(EFI_INVALID_PARAMETER); | |
2343 | ||
2344 | va_start(argptr, handle); | |
2345 | for (;;) { | |
2346 | protocol = va_arg(argptr, efi_guid_t*); | |
2347 | if (!protocol) | |
2348 | break; | |
2349 | protocol_interface = va_arg(argptr, void*); | |
2350 | r = EFI_CALL(efi_uninstall_protocol_interface( | |
2351 | handle, protocol, | |
2352 | protocol_interface)); | |
2353 | if (r != EFI_SUCCESS) | |
2354 | break; | |
2355 | i++; | |
2356 | } | |
2357 | va_end(argptr); | |
2358 | if (r == EFI_SUCCESS) | |
2359 | return EFI_EXIT(r); | |
2360 | ||
2361 | /* If an error occurred undo all changes. */ | |
2362 | va_start(argptr, handle); | |
2363 | for (; i; --i) { | |
2364 | protocol = va_arg(argptr, efi_guid_t*); | |
2365 | protocol_interface = va_arg(argptr, void*); | |
2366 | EFI_CALL(efi_install_protocol_interface(&handle, protocol, | |
2367 | EFI_NATIVE_INTERFACE, | |
2368 | protocol_interface)); | |
2369 | } | |
2370 | va_end(argptr); | |
2371 | ||
2372 | return EFI_EXIT(r); | |
bee91169 AG |
2373 | } |
2374 | ||
332468f7 HS |
2375 | /* |
2376 | * Calculate cyclic redundancy code. | |
2377 | * | |
2378 | * This function implements the CalculateCrc32 service. | |
2379 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2380 | * for details. | |
2381 | * | |
2382 | * @data buffer with data | |
2383 | * @data_size size of buffer in bytes | |
2384 | * @crc32_p cyclic redundancy code | |
2385 | * @return status code | |
2386 | */ | |
bee91169 AG |
2387 | static efi_status_t EFIAPI efi_calculate_crc32(void *data, |
2388 | unsigned long data_size, | |
2389 | uint32_t *crc32_p) | |
2390 | { | |
2391 | EFI_ENTRY("%p, %ld", data, data_size); | |
2392 | *crc32_p = crc32(0, data, data_size); | |
2393 | return EFI_EXIT(EFI_SUCCESS); | |
2394 | } | |
2395 | ||
332468f7 HS |
2396 | /* |
2397 | * Copy memory. | |
2398 | * | |
2399 | * This function implements the CopyMem service. | |
2400 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2401 | * for details. | |
2402 | * | |
2403 | * @destination destination of the copy operation | |
2404 | * @source source of the copy operation | |
2405 | * @length number of bytes to copy | |
2406 | */ | |
fc05a959 HS |
2407 | static void EFIAPI efi_copy_mem(void *destination, const void *source, |
2408 | size_t length) | |
bee91169 | 2409 | { |
fc05a959 | 2410 | EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length); |
bee91169 | 2411 | memcpy(destination, source, length); |
f7c78176 | 2412 | EFI_EXIT(EFI_SUCCESS); |
bee91169 AG |
2413 | } |
2414 | ||
332468f7 HS |
2415 | /* |
2416 | * Fill memory with a byte value. | |
2417 | * | |
2418 | * This function implements the SetMem service. | |
2419 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2420 | * for details. | |
2421 | * | |
2422 | * @buffer buffer to fill | |
2423 | * @size size of buffer in bytes | |
2424 | * @value byte to copy to the buffer | |
2425 | */ | |
fc05a959 | 2426 | static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value) |
bee91169 | 2427 | { |
fc05a959 | 2428 | EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value); |
bee91169 | 2429 | memset(buffer, value, size); |
f7c78176 | 2430 | EFI_EXIT(EFI_SUCCESS); |
bee91169 AG |
2431 | } |
2432 | ||
191a41cc HS |
2433 | /* |
2434 | * Open protocol interface on a handle. | |
2435 | * | |
2436 | * @handler handler of a protocol | |
2437 | * @protocol_interface interface implementing the protocol | |
2438 | * @agent_handle handle of the driver | |
2439 | * @controller_handle handle of the controller | |
2440 | * @attributes attributes indicating how to open the protocol | |
2441 | * @return status code | |
2442 | */ | |
2443 | static efi_status_t efi_protocol_open( | |
2444 | struct efi_handler *handler, | |
2445 | void **protocol_interface, void *agent_handle, | |
2446 | void *controller_handle, uint32_t attributes) | |
2447 | { | |
2448 | struct efi_open_protocol_info_item *item; | |
2449 | struct efi_open_protocol_info_entry *match = NULL; | |
2450 | bool opened_by_driver = false; | |
2451 | bool opened_exclusive = false; | |
2452 | ||
2453 | /* If there is no agent, only return the interface */ | |
2454 | if (!agent_handle) | |
2455 | goto out; | |
2456 | ||
2457 | /* For TEST_PROTOCOL ignore interface attribute */ | |
2458 | if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
2459 | *protocol_interface = NULL; | |
2460 | ||
2461 | /* | |
2462 | * Check if the protocol is already opened by a driver with the same | |
2463 | * attributes or opened exclusively | |
2464 | */ | |
2465 | list_for_each_entry(item, &handler->open_infos, link) { | |
2466 | if (item->info.agent_handle == agent_handle) { | |
2467 | if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) && | |
2468 | (item->info.attributes == attributes)) | |
2469 | return EFI_ALREADY_STARTED; | |
2470 | } | |
2471 | if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) | |
2472 | opened_exclusive = true; | |
2473 | } | |
2474 | ||
2475 | /* Only one controller can open the protocol exclusively */ | |
2476 | if (opened_exclusive && attributes & | |
2477 | (EFI_OPEN_PROTOCOL_EXCLUSIVE | EFI_OPEN_PROTOCOL_BY_DRIVER)) | |
2478 | return EFI_ACCESS_DENIED; | |
2479 | ||
2480 | /* Prepare exclusive opening */ | |
2481 | if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) { | |
2482 | /* Try to disconnect controllers */ | |
2483 | list_for_each_entry(item, &handler->open_infos, link) { | |
2484 | if (item->info.attributes == | |
2485 | EFI_OPEN_PROTOCOL_BY_DRIVER) | |
2486 | EFI_CALL(efi_disconnect_controller( | |
2487 | item->info.controller_handle, | |
2488 | item->info.agent_handle, | |
2489 | NULL)); | |
2490 | } | |
2491 | opened_by_driver = false; | |
2492 | /* Check if all controllers are disconnected */ | |
2493 | list_for_each_entry(item, &handler->open_infos, link) { | |
2494 | if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) | |
2495 | opened_by_driver = true; | |
2496 | } | |
2497 | /* Only one controller can be conncected */ | |
2498 | if (opened_by_driver) | |
2499 | return EFI_ACCESS_DENIED; | |
2500 | } | |
2501 | ||
2502 | /* Find existing entry */ | |
2503 | list_for_each_entry(item, &handler->open_infos, link) { | |
2504 | if (item->info.agent_handle == agent_handle && | |
2505 | item->info.controller_handle == controller_handle) | |
2506 | match = &item->info; | |
2507 | } | |
2508 | /* None found, create one */ | |
2509 | if (!match) { | |
2510 | match = efi_create_open_info(handler); | |
2511 | if (!match) | |
2512 | return EFI_OUT_OF_RESOURCES; | |
2513 | } | |
2514 | ||
2515 | match->agent_handle = agent_handle; | |
2516 | match->controller_handle = controller_handle; | |
2517 | match->attributes = attributes; | |
2518 | match->open_count++; | |
2519 | ||
2520 | out: | |
2521 | /* For TEST_PROTOCOL ignore interface attribute. */ | |
2522 | if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) | |
2523 | *protocol_interface = handler->protocol_interface; | |
2524 | ||
2525 | return EFI_SUCCESS; | |
2526 | } | |
2527 | ||
332468f7 HS |
2528 | /* |
2529 | * Open protocol interface on a handle. | |
2530 | * | |
2531 | * This function implements the OpenProtocol interface. | |
2532 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2533 | * for details. | |
2534 | * | |
2535 | * @handle handle on which the protocol shall be opened | |
2536 | * @protocol GUID of the protocol | |
2537 | * @protocol_interface interface implementing the protocol | |
2538 | * @agent_handle handle of the driver | |
2539 | * @controller_handle handle of the controller | |
2540 | * @attributes attributes indicating how to open the protocol | |
2541 | * @return status code | |
2542 | */ | |
bee91169 | 2543 | static efi_status_t EFIAPI efi_open_protocol( |
5a9682d0 | 2544 | void *handle, const efi_guid_t *protocol, |
bee91169 AG |
2545 | void **protocol_interface, void *agent_handle, |
2546 | void *controller_handle, uint32_t attributes) | |
2547 | { | |
80286e8f | 2548 | struct efi_handler *handler; |
69baec67 | 2549 | efi_status_t r = EFI_INVALID_PARAMETER; |
bee91169 | 2550 | |
778e6af8 | 2551 | EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol, |
bee91169 AG |
2552 | protocol_interface, agent_handle, controller_handle, |
2553 | attributes); | |
b5349f74 | 2554 | |
69baec67 HS |
2555 | if (!handle || !protocol || |
2556 | (!protocol_interface && attributes != | |
2557 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) { | |
2558 | goto out; | |
2559 | } | |
2560 | ||
2561 | switch (attributes) { | |
2562 | case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL: | |
2563 | case EFI_OPEN_PROTOCOL_GET_PROTOCOL: | |
2564 | case EFI_OPEN_PROTOCOL_TEST_PROTOCOL: | |
2565 | break; | |
2566 | case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER: | |
2567 | if (controller_handle == handle) | |
2568 | goto out; | |
191a41cc | 2569 | /* fall-through */ |
69baec67 HS |
2570 | case EFI_OPEN_PROTOCOL_BY_DRIVER: |
2571 | case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE: | |
191a41cc HS |
2572 | /* Check that the controller handle is valid */ |
2573 | if (!efi_search_obj(controller_handle)) | |
69baec67 | 2574 | goto out; |
191a41cc | 2575 | /* fall-through */ |
69baec67 | 2576 | case EFI_OPEN_PROTOCOL_EXCLUSIVE: |
191a41cc HS |
2577 | /* Check that the agent handle is valid */ |
2578 | if (!efi_search_obj(agent_handle)) | |
69baec67 HS |
2579 | goto out; |
2580 | break; | |
2581 | default: | |
b5349f74 HS |
2582 | goto out; |
2583 | } | |
2584 | ||
80286e8f HS |
2585 | r = efi_search_protocol(handle, protocol, &handler); |
2586 | if (r != EFI_SUCCESS) | |
2587 | goto out; | |
bee91169 | 2588 | |
191a41cc HS |
2589 | r = efi_protocol_open(handler, protocol_interface, agent_handle, |
2590 | controller_handle, attributes); | |
bee91169 AG |
2591 | out: |
2592 | return EFI_EXIT(r); | |
2593 | } | |
2594 | ||
332468f7 HS |
2595 | /* |
2596 | * Get interface of a protocol on a handle. | |
2597 | * | |
2598 | * This function implements the HandleProtocol service. | |
2599 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2600 | * for details. | |
2601 | * | |
2602 | * @handle handle on which the protocol shall be opened | |
2603 | * @protocol GUID of the protocol | |
2604 | * @protocol_interface interface implementing the protocol | |
2605 | * @return status code | |
2606 | */ | |
2074f700 | 2607 | static efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle, |
5a9682d0 | 2608 | const efi_guid_t *protocol, |
bee91169 AG |
2609 | void **protocol_interface) |
2610 | { | |
8e1d329f HS |
2611 | return efi_open_protocol(handle, protocol, protocol_interface, NULL, |
2612 | NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL); | |
bee91169 AG |
2613 | } |
2614 | ||
f0959dbe HS |
2615 | static efi_status_t efi_bind_controller( |
2616 | efi_handle_t controller_handle, | |
2617 | efi_handle_t driver_image_handle, | |
2618 | struct efi_device_path *remain_device_path) | |
2619 | { | |
2620 | struct efi_driver_binding_protocol *binding_protocol; | |
2621 | efi_status_t r; | |
2622 | ||
2623 | r = EFI_CALL(efi_open_protocol(driver_image_handle, | |
2624 | &efi_guid_driver_binding_protocol, | |
2625 | (void **)&binding_protocol, | |
2626 | driver_image_handle, NULL, | |
2627 | EFI_OPEN_PROTOCOL_GET_PROTOCOL)); | |
2628 | if (r != EFI_SUCCESS) | |
2629 | return r; | |
2630 | r = EFI_CALL(binding_protocol->supported(binding_protocol, | |
2631 | controller_handle, | |
2632 | remain_device_path)); | |
2633 | if (r == EFI_SUCCESS) | |
2634 | r = EFI_CALL(binding_protocol->start(binding_protocol, | |
2635 | controller_handle, | |
2636 | remain_device_path)); | |
2637 | EFI_CALL(efi_close_protocol(driver_image_handle, | |
2638 | &efi_guid_driver_binding_protocol, | |
2639 | driver_image_handle, NULL)); | |
2640 | return r; | |
2641 | } | |
2642 | ||
2643 | static efi_status_t efi_connect_single_controller( | |
2644 | efi_handle_t controller_handle, | |
2645 | efi_handle_t *driver_image_handle, | |
2646 | struct efi_device_path *remain_device_path) | |
2647 | { | |
2648 | efi_handle_t *buffer; | |
2649 | size_t count; | |
2650 | size_t i; | |
2651 | efi_status_t r; | |
2652 | size_t connected = 0; | |
2653 | ||
2654 | /* Get buffer with all handles with driver binding protocol */ | |
2655 | r = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, | |
2656 | &efi_guid_driver_binding_protocol, | |
2657 | NULL, &count, &buffer)); | |
2658 | if (r != EFI_SUCCESS) | |
2659 | return r; | |
2660 | ||
2661 | /* Context Override */ | |
2662 | if (driver_image_handle) { | |
2663 | for (; *driver_image_handle; ++driver_image_handle) { | |
2664 | for (i = 0; i < count; ++i) { | |
2665 | if (buffer[i] == *driver_image_handle) { | |
2666 | buffer[i] = NULL; | |
2667 | r = efi_bind_controller( | |
2668 | controller_handle, | |
2669 | *driver_image_handle, | |
2670 | remain_device_path); | |
2671 | /* | |
2672 | * For drivers that do not support the | |
2673 | * controller or are already connected | |
2674 | * we receive an error code here. | |
2675 | */ | |
2676 | if (r == EFI_SUCCESS) | |
2677 | ++connected; | |
2678 | } | |
2679 | } | |
2680 | } | |
2681 | } | |
2682 | ||
2683 | /* | |
2684 | * TODO: Some overrides are not yet implemented: | |
2685 | * - Platform Driver Override | |
2686 | * - Driver Family Override Search | |
2687 | * - Bus Specific Driver Override | |
2688 | */ | |
2689 | ||
2690 | /* Driver Binding Search */ | |
2691 | for (i = 0; i < count; ++i) { | |
2692 | if (buffer[i]) { | |
2693 | r = efi_bind_controller(controller_handle, | |
2694 | buffer[i], | |
2695 | remain_device_path); | |
2696 | if (r == EFI_SUCCESS) | |
2697 | ++connected; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | efi_free_pool(buffer); | |
2702 | if (!connected) | |
2703 | return EFI_NOT_FOUND; | |
2704 | return EFI_SUCCESS; | |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * Connect a controller to a driver. | |
2709 | * | |
2710 | * This function implements the ConnectController service. | |
2711 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2712 | * for details. | |
2713 | * | |
2714 | * First all driver binding protocol handles are tried for binding drivers. | |
2715 | * Afterwards all handles that have openened a protocol of the controller | |
2716 | * with EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER are connected to drivers. | |
2717 | * | |
2718 | * @controller_handle handle of the controller | |
2719 | * @driver_image_handle handle of the driver | |
2720 | * @remain_device_path device path of a child controller | |
2721 | * @recursive true to connect all child controllers | |
2722 | * @return status code | |
2723 | */ | |
2724 | static efi_status_t EFIAPI efi_connect_controller( | |
2725 | efi_handle_t controller_handle, | |
2726 | efi_handle_t *driver_image_handle, | |
2727 | struct efi_device_path *remain_device_path, | |
2728 | bool recursive) | |
2729 | { | |
2730 | efi_status_t r; | |
2731 | efi_status_t ret = EFI_NOT_FOUND; | |
2732 | struct efi_object *efiobj; | |
2733 | ||
2734 | EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle, | |
2735 | remain_device_path, recursive); | |
2736 | ||
2737 | efiobj = efi_search_obj(controller_handle); | |
2738 | if (!efiobj) { | |
2739 | ret = EFI_INVALID_PARAMETER; | |
2740 | goto out; | |
2741 | } | |
2742 | ||
2743 | r = efi_connect_single_controller(controller_handle, | |
2744 | driver_image_handle, | |
2745 | remain_device_path); | |
2746 | if (r == EFI_SUCCESS) | |
2747 | ret = EFI_SUCCESS; | |
2748 | if (recursive) { | |
2749 | struct efi_handler *handler; | |
2750 | struct efi_open_protocol_info_item *item; | |
2751 | ||
2752 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2753 | list_for_each_entry(item, &handler->open_infos, link) { | |
2754 | if (item->info.attributes & | |
2755 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { | |
2756 | r = EFI_CALL(efi_connect_controller( | |
2757 | item->info.controller_handle, | |
2758 | driver_image_handle, | |
2759 | remain_device_path, | |
2760 | recursive)); | |
2761 | if (r == EFI_SUCCESS) | |
2762 | ret = EFI_SUCCESS; | |
2763 | } | |
2764 | } | |
2765 | } | |
2766 | } | |
2767 | /* Check for child controller specified by end node */ | |
2768 | if (ret != EFI_SUCCESS && remain_device_path && | |
2769 | remain_device_path->type == DEVICE_PATH_TYPE_END) | |
2770 | ret = EFI_SUCCESS; | |
2771 | out: | |
2772 | return EFI_EXIT(ret); | |
2773 | } | |
2774 | ||
3f9b0042 HS |
2775 | /* |
2776 | * Get all child controllers associated to a driver. | |
2777 | * The allocated buffer has to be freed with free(). | |
2778 | * | |
2779 | * @efiobj handle of the controller | |
2780 | * @driver_handle handle of the driver | |
2781 | * @number_of_children number of child controllers | |
2782 | * @child_handle_buffer handles of the the child controllers | |
2783 | */ | |
2784 | static efi_status_t efi_get_child_controllers( | |
2785 | struct efi_object *efiobj, | |
2786 | efi_handle_t driver_handle, | |
2787 | efi_uintn_t *number_of_children, | |
2788 | efi_handle_t **child_handle_buffer) | |
2789 | { | |
2790 | struct efi_handler *handler; | |
2791 | struct efi_open_protocol_info_item *item; | |
2792 | efi_uintn_t count = 0, i; | |
2793 | bool duplicate; | |
2794 | ||
2795 | /* Count all child controller associations */ | |
2796 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2797 | list_for_each_entry(item, &handler->open_infos, link) { | |
2798 | if (item->info.agent_handle == driver_handle && | |
2799 | item->info.attributes & | |
2800 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) | |
2801 | ++count; | |
2802 | } | |
2803 | } | |
2804 | /* | |
2805 | * Create buffer. In case of duplicate child controller assignments | |
2806 | * the buffer will be too large. But that does not harm. | |
2807 | */ | |
2808 | *number_of_children = 0; | |
2809 | *child_handle_buffer = calloc(count, sizeof(efi_handle_t)); | |
2810 | if (!*child_handle_buffer) | |
2811 | return EFI_OUT_OF_RESOURCES; | |
2812 | /* Copy unique child handles */ | |
2813 | list_for_each_entry(handler, &efiobj->protocols, link) { | |
2814 | list_for_each_entry(item, &handler->open_infos, link) { | |
2815 | if (item->info.agent_handle == driver_handle && | |
2816 | item->info.attributes & | |
2817 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { | |
2818 | /* Check this is a new child controller */ | |
2819 | duplicate = false; | |
2820 | for (i = 0; i < *number_of_children; ++i) { | |
2821 | if ((*child_handle_buffer)[i] == | |
2822 | item->info.controller_handle) | |
2823 | duplicate = true; | |
2824 | } | |
2825 | /* Copy handle to buffer */ | |
2826 | if (!duplicate) { | |
2827 | i = (*number_of_children)++; | |
2828 | (*child_handle_buffer)[i] = | |
2829 | item->info.controller_handle; | |
2830 | } | |
2831 | } | |
2832 | } | |
2833 | } | |
2834 | return EFI_SUCCESS; | |
2835 | } | |
2836 | ||
2837 | /* | |
2838 | * Disconnect a controller from a driver. | |
2839 | * | |
2840 | * This function implements the DisconnectController service. | |
2841 | * See the Unified Extensible Firmware Interface (UEFI) specification | |
2842 | * for details. | |
2843 | * | |
2844 | * @controller_handle handle of the controller | |
2845 | * @driver_image_handle handle of the driver | |
2846 | * @child_handle handle of the child to destroy | |
2847 | * @return status code | |
2848 | */ | |
2849 | static efi_status_t EFIAPI efi_disconnect_controller( | |
2850 | efi_handle_t controller_handle, | |
2851 | efi_handle_t driver_image_handle, | |
2852 | efi_handle_t child_handle) | |
2853 | { | |
2854 | struct efi_driver_binding_protocol *binding_protocol; | |
2855 | efi_handle_t *child_handle_buffer = NULL; | |
2856 | size_t number_of_children = 0; | |
2857 | efi_status_t r; | |
2858 | size_t stop_count = 0; | |
2859 | struct efi_object *efiobj; | |
2860 | ||
2861 | EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle, | |
2862 | child_handle); | |
2863 | ||
2864 | efiobj = efi_search_obj(controller_handle); | |
2865 | if (!efiobj) { | |
2866 | r = EFI_INVALID_PARAMETER; | |
2867 | goto out; | |
2868 | } | |
2869 | ||
2870 | if (child_handle && !efi_search_obj(child_handle)) { | |
2871 | r = EFI_INVALID_PARAMETER; | |
2872 | goto out; | |
2873 | } | |
2874 | ||
2875 | /* If no driver handle is supplied, disconnect all drivers */ | |
2876 | if (!driver_image_handle) { | |
2877 | r = efi_disconnect_all_drivers(efiobj, NULL, child_handle); | |
2878 | goto out; | |
2879 | } | |
2880 | ||
2881 | /* Create list of child handles */ | |
2882 | if (child_handle) { | |
2883 | number_of_children = 1; | |
2884 | child_handle_buffer = &child_handle; | |
2885 | } else { | |
2886 | efi_get_child_controllers(efiobj, | |
2887 | driver_image_handle, | |
2888 | &number_of_children, | |
2889 | &child_handle_buffer); | |
2890 | } | |
2891 | ||
2892 | /* Get the driver binding protocol */ | |
2893 | r = EFI_CALL(efi_open_protocol(driver_image_handle, | |
2894 | &efi_guid_driver_binding_protocol, | |
2895 | (void **)&binding_protocol, | |
2896 | driver_image_handle, NULL, | |
2897 | EFI_OPEN_PROTOCOL_GET_PROTOCOL)); | |
2898 | if (r != EFI_SUCCESS) | |
2899 | goto out; | |
2900 | /* Remove the children */ | |
2901 | if (number_of_children) { | |
2902 | r = EFI_CALL(binding_protocol->stop(binding_protocol, | |
2903 | controller_handle, | |
2904 | number_of_children, | |
2905 | child_handle_buffer)); | |
2906 | if (r == EFI_SUCCESS) | |
2907 | ++stop_count; | |
2908 | } | |
2909 | /* Remove the driver */ | |
2910 | if (!child_handle) | |
2911 | r = EFI_CALL(binding_protocol->stop(binding_protocol, | |
2912 | controller_handle, | |
2913 | 0, NULL)); | |
2914 | if (r == EFI_SUCCESS) | |
2915 | ++stop_count; | |
2916 | EFI_CALL(efi_close_protocol(driver_image_handle, | |
2917 | &efi_guid_driver_binding_protocol, | |
2918 | driver_image_handle, NULL)); | |
2919 | ||
2920 | if (stop_count) | |
2921 | r = EFI_SUCCESS; | |
2922 | else | |
2923 | r = EFI_NOT_FOUND; | |
2924 | out: | |
2925 | if (!child_handle) | |
2926 | free(child_handle_buffer); | |
2927 | return EFI_EXIT(r); | |
2928 | } | |
2929 | ||
bee91169 AG |
2930 | static const struct efi_boot_services efi_boot_services = { |
2931 | .hdr = { | |
2932 | .headersize = sizeof(struct efi_table_hdr), | |
2933 | }, | |
2934 | .raise_tpl = efi_raise_tpl, | |
2935 | .restore_tpl = efi_restore_tpl, | |
2936 | .allocate_pages = efi_allocate_pages_ext, | |
2937 | .free_pages = efi_free_pages_ext, | |
2938 | .get_memory_map = efi_get_memory_map_ext, | |
ead1274b | 2939 | .allocate_pool = efi_allocate_pool_ext, |
42417bc8 | 2940 | .free_pool = efi_free_pool_ext, |
49deb455 | 2941 | .create_event = efi_create_event_ext, |
bfc72462 | 2942 | .set_timer = efi_set_timer_ext, |
bee91169 | 2943 | .wait_for_event = efi_wait_for_event, |
c6841592 | 2944 | .signal_event = efi_signal_event_ext, |
bee91169 AG |
2945 | .close_event = efi_close_event, |
2946 | .check_event = efi_check_event, | |
1760ef57 | 2947 | .install_protocol_interface = efi_install_protocol_interface, |
bee91169 | 2948 | .reinstall_protocol_interface = efi_reinstall_protocol_interface, |
cd534083 | 2949 | .uninstall_protocol_interface = efi_uninstall_protocol_interface, |
bee91169 AG |
2950 | .handle_protocol = efi_handle_protocol, |
2951 | .reserved = NULL, | |
2952 | .register_protocol_notify = efi_register_protocol_notify, | |
26329584 | 2953 | .locate_handle = efi_locate_handle_ext, |
bee91169 | 2954 | .locate_device_path = efi_locate_device_path, |
488bf12d | 2955 | .install_configuration_table = efi_install_configuration_table_ext, |
bee91169 AG |
2956 | .load_image = efi_load_image, |
2957 | .start_image = efi_start_image, | |
a86aeaf2 | 2958 | .exit = efi_exit, |
bee91169 AG |
2959 | .unload_image = efi_unload_image, |
2960 | .exit_boot_services = efi_exit_boot_services, | |
2961 | .get_next_monotonic_count = efi_get_next_monotonic_count, | |
2962 | .stall = efi_stall, | |
2963 | .set_watchdog_timer = efi_set_watchdog_timer, | |
2964 | .connect_controller = efi_connect_controller, | |
2965 | .disconnect_controller = efi_disconnect_controller, | |
2966 | .open_protocol = efi_open_protocol, | |
2967 | .close_protocol = efi_close_protocol, | |
2968 | .open_protocol_information = efi_open_protocol_information, | |
2969 | .protocols_per_handle = efi_protocols_per_handle, | |
2970 | .locate_handle_buffer = efi_locate_handle_buffer, | |
2971 | .locate_protocol = efi_locate_protocol, | |
ab9efa97 HS |
2972 | .install_multiple_protocol_interfaces = |
2973 | efi_install_multiple_protocol_interfaces, | |
2974 | .uninstall_multiple_protocol_interfaces = | |
2975 | efi_uninstall_multiple_protocol_interfaces, | |
bee91169 AG |
2976 | .calculate_crc32 = efi_calculate_crc32, |
2977 | .copy_mem = efi_copy_mem, | |
2978 | .set_mem = efi_set_mem, | |
9f0930e5 | 2979 | .create_event_ex = efi_create_event_ex, |
bee91169 AG |
2980 | }; |
2981 | ||
05b6f56e | 2982 | static uint16_t __efi_runtime_data firmware_vendor[] = L"Das U-Boot"; |
bee91169 | 2983 | |
3c63db9c | 2984 | struct efi_system_table __efi_runtime_data systab = { |
bee91169 AG |
2985 | .hdr = { |
2986 | .signature = EFI_SYSTEM_TABLE_SIGNATURE, | |
f19a95a4 | 2987 | .revision = 2 << 16 | 70, /* 2.7 */ |
bee91169 AG |
2988 | .headersize = sizeof(struct efi_table_hdr), |
2989 | }, | |
2990 | .fw_vendor = (long)firmware_vendor, | |
ab9efa97 HS |
2991 | .con_in = (void *)&efi_con_in, |
2992 | .con_out = (void *)&efi_con_out, | |
2993 | .std_err = (void *)&efi_con_out, | |
2994 | .runtime = (void *)&efi_runtime_services, | |
2995 | .boottime = (void *)&efi_boot_services, | |
bee91169 | 2996 | .nr_tables = 0, |
ab9efa97 | 2997 | .tables = (void *)efi_conf_table, |
bee91169 | 2998 | }; |