/* List of all events */
LIST_HEAD(efi_events);
+/* List of queued events */
+LIST_HEAD(efi_event_queue);
+
+/* Flag to disable timer activity in ExitBootServices() */
+static bool timers_enabled = true;
+
/* List of all events registered by RegisterProtocolNotify() */
LIST_HEAD(efi_register_notify_events);
}
/**
+ * efi_event_is_queued() - check if an event is queued
+ *
+ * @event: event
+ * Return: true if event is queued
+ */
+static bool efi_event_is_queued(struct efi_event *event)
+{
+ return !!event->queue_link.next;
+}
+
+/**
+ * efi_process_event_queue() - process event queue
+ */
+static void efi_process_event_queue(void)
+{
+ while (!list_empty(&efi_event_queue)) {
+ struct efi_event *event;
+ efi_uintn_t old_tpl;
+
+ event = list_first_entry(&efi_event_queue, struct efi_event,
+ queue_link);
+ if (efi_tpl >= event->notify_tpl)
+ return;
+ list_del(&event->queue_link);
+ event->queue_link.next = NULL;
+ event->queue_link.prev = NULL;
+ /* Events must be executed at the event's TPL */
+ old_tpl = efi_tpl;
+ efi_tpl = event->notify_tpl;
+ EFI_CALL_VOID(event->notify_function(event,
+ event->notify_context));
+ efi_tpl = old_tpl;
+ if (event->type == EVT_NOTIFY_SIGNAL)
+ event->is_signaled = 0;
+ }
+}
+
+/**
* efi_queue_event() - queue an EFI event
* @event: event to signal
- * @check_tpl: check the TPL level
*
* This function queues the notification function of the event for future
* execution.
*
- * The notification function is called if the task priority level of the event
- * is higher than the current task priority level.
- *
- * For the SignalEvent service see efi_signal_event_ext.
- *
*/
-static void efi_queue_event(struct efi_event *event, bool check_tpl)
+static void efi_queue_event(struct efi_event *event)
{
- if (event->notify_function) {
- event->is_queued = true;
- /* Check TPL */
- if (check_tpl && efi_tpl >= event->notify_tpl)
- return;
- EFI_CALL_VOID(event->notify_function(event,
- event->notify_context));
+ struct efi_event *item = NULL;
+
+ if (!event->notify_function)
+ return;
+
+ if (!efi_event_is_queued(event)) {
+ /*
+ * Events must be notified in order of decreasing task priority
+ * level. Insert the new event accordingly.
+ */
+ list_for_each_entry(item, &efi_event_queue, queue_link) {
+ if (item->notify_tpl < event->notify_tpl) {
+ list_add_tail(&event->queue_link,
+ &item->queue_link);
+ event = NULL;
+ break;
+ }
+ }
+ if (event)
+ list_add_tail(&event->queue_link, &efi_event_queue);
}
- event->is_queued = false;
+ efi_process_event_queue();
}
/**
/**
* efi_signal_event() - signal an EFI event
* @event: event to signal
- * @check_tpl: check the TPL level
*
* This function signals an event. If the event belongs to an event group all
* events of the group are signaled. If they are of type EVT_NOTIFY_SIGNAL
*
* For the SignalEvent service see efi_signal_event_ext.
*/
-void efi_signal_event(struct efi_event *event, bool check_tpl)
+void efi_signal_event(struct efi_event *event)
{
+ if (event->is_signaled)
+ return;
if (event->group) {
struct efi_event *evt;
if (evt->is_signaled)
continue;
evt->is_signaled = true;
- if (evt->type & EVT_NOTIFY_SIGNAL &&
- evt->notify_function)
- evt->is_queued = true;
}
list_for_each_entry(evt, &efi_events, link) {
if (!evt->group || guidcmp(evt->group, event->group))
continue;
- if (evt->is_queued)
- efi_queue_event(evt, check_tpl);
+ efi_queue_event(evt);
}
} else {
event->is_signaled = true;
- if (event->type & EVT_NOTIFY_SIGNAL)
- efi_queue_event(event, check_tpl);
+ efi_queue_event(event);
}
}
ret = efi_search_protocol(handle, protocol, &handler);
if (ret != EFI_SUCCESS)
return ret;
- if (guidcmp(handler->guid, protocol))
- return EFI_INVALID_PARAMETER;
if (handler->protocol_interface != protocol_interface)
- return EFI_INVALID_PARAMETER;
+ return EFI_NOT_FOUND;
list_del(&handler->link);
free(handler);
return EFI_SUCCESS;
evt->group = group;
/* Disable timers on boot up */
evt->trigger_next = -1ULL;
- evt->is_queued = false;
- evt->is_signaled = false;
list_add_tail(&evt->link, &efi_events);
*event = evt;
return EFI_SUCCESS;
u64 now = timer_get_us();
list_for_each_entry(evt, &efi_events, link) {
- if (evt->is_queued)
- efi_queue_event(evt, true);
+ if (!timers_enabled)
+ continue;
if (!(evt->type & EVT_TIMER) || now < evt->trigger_next)
continue;
switch (evt->trigger_type) {
continue;
}
evt->is_signaled = false;
- efi_signal_event(evt, true);
+ efi_signal_event(evt);
}
+ efi_process_event_queue();
WATCHDOG_RESET();
}
if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (!event[i]->is_signaled)
- efi_queue_event(event[i], true);
+ efi_queue_event(event[i]);
}
/* Wait for signal */
EFI_ENTRY("%p", event);
if (efi_is_event(event) != EFI_SUCCESS)
return EFI_EXIT(EFI_INVALID_PARAMETER);
- efi_signal_event(event, true);
+ efi_signal_event(event);
return EFI_EXIT(EFI_SUCCESS);
}
list_for_each_entry_safe(item, next, &efi_register_notify_events,
link) {
if (event == item->event) {
+ struct efi_protocol_notification *hitem, *hnext;
+
+ /* Remove signaled handles */
+ list_for_each_entry_safe(hitem, hnext, &item->handles,
+ link) {
+ list_del(&hitem->link);
+ free(hitem);
+ }
list_del(&item->link);
free(item);
}
}
+ /* Remove event from queue */
+ if (efi_event_is_queued(event))
+ list_del(&event->queue_link);
list_del(&event->link);
free(event);
event->type & EVT_NOTIFY_SIGNAL)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (!event->is_signaled)
- efi_queue_event(event, true);
+ efi_queue_event(event);
if (event->is_signaled) {
event->is_signaled = false;
return EFI_EXIT(EFI_SUCCESS);
/* Notify registered events */
list_for_each_entry(event, &efi_register_notify_events, link) {
- if (!guidcmp(protocol, &event->protocol))
- efi_signal_event(event->event, true);
+ if (!guidcmp(protocol, &event->protocol)) {
+ struct efi_protocol_notification *notif;
+
+ notif = calloc(1, sizeof(*notif));
+ if (!notif) {
+ list_del(&handler->link);
+ free(handler);
+ return EFI_OUT_OF_RESOURCES;
+ }
+ notif->handle = handle;
+ list_add_tail(¬if->link, &event->handles);
+ event->event->is_signaled = false;
+ efi_signal_event(event->event);
+ }
}
if (!guidcmp(&efi_guid_device_path, protocol))
++count;
}
}
+ *number_of_drivers = 0;
+ if (!count) {
+ *driver_handle_buffer = NULL;
+ return EFI_SUCCESS;
+ }
/*
* Create buffer. In case of duplicate driver assignments the buffer
* will be too large. But that does not harm.
*/
- *number_of_drivers = 0;
*driver_handle_buffer = calloc(count, sizeof(efi_handle_t));
if (!*driver_handle_buffer)
return EFI_OUT_OF_RESOURCES;
&driver_handle_buffer);
if (ret != EFI_SUCCESS)
return ret;
-
+ if (!number_of_drivers)
+ return EFI_SUCCESS;
ret = EFI_NOT_FOUND;
while (number_of_drivers) {
r = EFI_CALL(efi_disconnect_controller(
goto out;
/* Disconnect controllers */
efi_disconnect_all_drivers(efiobj, protocol, NULL);
- if (!list_empty(&handler->open_infos)) {
- r = EFI_ACCESS_DENIED;
- goto out;
- }
/* Close protocol */
list_for_each_entry_safe(item, pos, &handler->open_infos, link) {
if (item->info.attributes ==
item->event = event;
memcpy(&item->protocol, protocol, sizeof(efi_guid_t));
+ INIT_LIST_HEAD(&item->handles);
list_add_tail(&item->link, &efi_register_notify_events);
switch (search_type) {
case ALL_HANDLES:
return 0;
- case BY_REGISTER_NOTIFY:
case BY_PROTOCOL:
ret = efi_search_protocol(handle, protocol, NULL);
return (ret != EFI_SUCCESS);
}
/**
+ * efi_check_register_notify_event() - check if registration key is valid
+ *
+ * Check that a pointer is a valid registration key as returned by
+ * RegisterProtocolNotify().
+ *
+ * @key: registration key
+ * Return: valid registration key or NULL
+ */
+static struct efi_register_notify_event *efi_check_register_notify_event
+ (void *key)
+{
+ struct efi_register_notify_event *event;
+
+ list_for_each_entry(event, &efi_register_notify_events, link) {
+ if (event == (struct efi_register_notify_event *)key)
+ return event;
+ }
+ return NULL;
+}
+
+/**
* efi_locate_handle() - locate handles implementing a protocol
*
* @search_type: selection criterion
{
struct efi_object *efiobj;
efi_uintn_t size = 0;
- struct efi_register_notify_event *item, *event = NULL;
+ struct efi_register_notify_event *event;
+ struct efi_protocol_notification *handle = NULL;
/* Check parameters */
switch (search_type) {
if (!search_key)
return EFI_INVALID_PARAMETER;
/* Check that the registration key is valid */
- list_for_each_entry(item, &efi_register_notify_events, link) {
- if (item ==
- (struct efi_register_notify_event *)search_key) {
- event = item;
- break;
- }
- }
+ event = efi_check_register_notify_event(search_key);
if (!event)
return EFI_INVALID_PARAMETER;
-
- protocol = &event->protocol;
break;
case BY_PROTOCOL:
if (!protocol)
}
/* Count how much space we need */
- list_for_each_entry(efiobj, &efi_obj_list, link) {
- if (!efi_search(search_type, protocol, efiobj))
- size += sizeof(void *);
+ if (search_type == BY_REGISTER_NOTIFY) {
+ if (list_empty(&event->handles))
+ return EFI_NOT_FOUND;
+ handle = list_first_entry(&event->handles,
+ struct efi_protocol_notification,
+ link);
+ efiobj = handle->handle;
+ size += sizeof(void *);
+ } else {
+ list_for_each_entry(efiobj, &efi_obj_list, link) {
+ if (!efi_search(search_type, protocol, efiobj))
+ size += sizeof(void *);
+ }
+ if (size == 0)
+ return EFI_NOT_FOUND;
}
- if (size == 0)
- return EFI_NOT_FOUND;
-
if (!buffer_size)
return EFI_INVALID_PARAMETER;
*buffer_size = size;
- /* The buffer size is sufficient but there is not buffer */
+ /* The buffer size is sufficient but there is no buffer */
if (!buffer)
return EFI_INVALID_PARAMETER;
/* Then fill the array */
- list_for_each_entry(efiobj, &efi_obj_list, link) {
- if (!efi_search(search_type, protocol, efiobj))
- *buffer++ = efiobj;
+ if (search_type == BY_REGISTER_NOTIFY) {
+ *buffer = efiobj;
+ list_del(&handle->link);
+ } else {
+ list_for_each_entry(efiobj, &efi_obj_list, link) {
+ if (!efi_search(search_type, protocol, efiobj))
+ *buffer++ = efiobj;
+ }
}
return EFI_SUCCESS;
/* Notify that the configuration table was changed */
list_for_each_entry(evt, &efi_events, link) {
if (evt->group && !guidcmp(evt->group, guid)) {
- efi_signal_event(evt, false);
+ efi_signal_event(evt);
break;
}
}
/* Open file */
f = efi_file_from_path(file_path);
if (!f)
- return EFI_DEVICE_ERROR;
+ return EFI_NOT_FOUND;
/* Get file size */
bs = 0;
EFI_ENTRY("%d, %p, %pD, %p, %zd, %p", boot_policy, parent_image,
file_path, source_buffer, source_size, image_handle);
- if (!image_handle || !efi_search_obj(parent_image)) {
- ret = EFI_INVALID_PARAMETER;
- goto error;
- }
-
- if (!source_buffer && !file_path) {
- ret = EFI_NOT_FOUND;
- goto error;
- }
- /* The parent image handle must refer to a loaded image */
- if (!parent_image->type) {
+ if (!image_handle || (!source_buffer && !file_path) ||
+ !efi_search_obj(parent_image) ||
+ /* The parent image handle must refer to a loaded image */
+ !parent_image->type) {
ret = EFI_INVALID_PARAMETER;
goto error;
}
efi_uintn_t map_key)
{
struct efi_event *evt;
+ efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %zx", image_handle, map_key);
/* Check that the caller has read the current memory map */
- if (map_key != efi_memory_map_key)
- return EFI_INVALID_PARAMETER;
-
- /* Make sure that notification functions are not called anymore */
- efi_tpl = TPL_HIGH_LEVEL;
+ if (map_key != efi_memory_map_key) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
/* Check if ExitBootServices has already been called */
if (!systab.boottime)
- return EFI_EXIT(EFI_SUCCESS);
+ goto out;
+
+ /* Stop all timer related activities */
+ timers_enabled = false;
/* Add related events to the event group */
list_for_each_entry(evt, &efi_events, link) {
if (evt->group &&
!guidcmp(evt->group,
&efi_guid_event_group_exit_boot_services)) {
- efi_signal_event(evt, false);
+ efi_signal_event(evt);
break;
}
}
+ /* Make sure that notification functions are not called anymore */
+ efi_tpl = TPL_HIGH_LEVEL;
+
/* TODO: Should persist EFI variables here */
board_quiesce_devices();
/* Give the payload some time to boot */
efi_set_watchdog(0);
WATCHDOG_RESET();
-
- return EFI_EXIT(EFI_SUCCESS);
+out:
+ return EFI_EXIT(ret);
}
/**
static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
{
static uint64_t mono;
+ efi_status_t ret;
EFI_ENTRY("%p", count);
+ if (!count) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
*count = mono++;
- return EFI_EXIT(EFI_SUCCESS);
+ ret = EFI_SUCCESS;
+out:
+ return EFI_EXIT(ret);
}
/**
*/
static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
{
+ u64 end_tick;
+
EFI_ENTRY("%ld", microseconds);
- udelay(microseconds);
+
+ end_tick = get_ticks() + usec_to_tick(microseconds);
+ while (get_ticks() < end_tick)
+ efi_timer_check();
+
return EFI_EXIT(EFI_SUCCESS);
}
item->info.controller_handle == controller_handle) {
efi_delete_open_info(item);
r = EFI_SUCCESS;
- break;
}
}
out:
void *registration,
void **protocol_interface)
{
- struct list_head *lhandle;
+ struct efi_handler *handler;
efi_status_t ret;
+ struct efi_object *efiobj;
EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface);
+ /*
+ * The UEFI spec explicitly requires a protocol even if a registration
+ * key is provided. This differs from the logic in LocateHandle().
+ */
if (!protocol || !protocol_interface)
return EFI_EXIT(EFI_INVALID_PARAMETER);
- list_for_each(lhandle, &efi_obj_list) {
- struct efi_object *efiobj;
- struct efi_handler *handler;
-
- efiobj = list_entry(lhandle, struct efi_object, link);
+ if (registration) {
+ struct efi_register_notify_event *event;
+ struct efi_protocol_notification *handle;
+ event = efi_check_register_notify_event(registration);
+ if (!event)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+ /*
+ * The UEFI spec requires to return EFI_NOT_FOUND if no
+ * protocol instance matches protocol and registration.
+ * So let's do the same for a mismatch between protocol and
+ * registration.
+ */
+ if (guidcmp(&event->protocol, protocol))
+ goto not_found;
+ if (list_empty(&event->handles))
+ goto not_found;
+ handle = list_first_entry(&event->handles,
+ struct efi_protocol_notification,
+ link);
+ efiobj = handle->handle;
+ list_del(&handle->link);
+ free(handle);
ret = efi_search_protocol(efiobj, protocol, &handler);
- if (ret == EFI_SUCCESS) {
- *protocol_interface = handler->protocol_interface;
- return EFI_EXIT(EFI_SUCCESS);
+ if (ret == EFI_SUCCESS)
+ goto found;
+ } else {
+ list_for_each_entry(efiobj, &efi_obj_list, link) {
+ ret = efi_search_protocol(efiobj, protocol, &handler);
+ if (ret == EFI_SUCCESS)
+ goto found;
}
}
+not_found:
*protocol_interface = NULL;
-
return EFI_EXIT(EFI_NOT_FOUND);
+found:
+ *protocol_interface = handler->protocol_interface;
+ return EFI_EXIT(EFI_SUCCESS);
}
/**
EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
- if (!protocol || !device_path || !*device_path || !device) {
+ if (!protocol || !device_path || !*device_path) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/* Check if dp is a subpath of device_path */
if (memcmp(*device_path, dp, len_dp))
continue;
+ if (!device) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
*device = handles[i];
len_best = len_dp;
}
efi_va_list argptr;
const efi_guid_t *protocol;
void *protocol_interface;
+ efi_handle_t old_handle;
efi_status_t r = EFI_SUCCESS;
int i = 0;
if (!protocol)
break;
protocol_interface = efi_va_arg(argptr, void*);
+ /* Check that a device path has not been installed before */
+ if (!guidcmp(protocol, &efi_guid_device_path)) {
+ struct efi_device_path *dp = protocol_interface;
+
+ r = EFI_CALL(efi_locate_device_path(protocol, &dp,
+ &old_handle));
+ if (r == EFI_SUCCESS &&
+ dp->type == DEVICE_PATH_TYPE_END) {
+ EFI_PRINT("Path %pD already installed\n",
+ protocol_interface);
+ r = EFI_ALREADY_STARTED;
+ break;
+ }
+ }
r = EFI_CALL(efi_install_protocol_interface(
handle, protocol,
EFI_NATIVE_INTERFACE,
efi_uintn_t data_size,
u32 *crc32_p)
{
+ efi_status_t ret = EFI_SUCCESS;
+
EFI_ENTRY("%p, %zu", data, data_size);
+ if (!data || !data_size || !crc32_p) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
*crc32_p = crc32(0, data, data_size);
- return EFI_EXIT(EFI_SUCCESS);
+out:
+ return EFI_EXIT(ret);
}
/**
if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) &&
(item->info.attributes == attributes))
return EFI_ALREADY_STARTED;
+ } else {
+ if (item->info.attributes &
+ EFI_OPEN_PROTOCOL_BY_DRIVER)
+ opened_by_driver = true;
}
if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE)
opened_exclusive = true;
}
/* Only one controller can open the protocol exclusively */
- if (opened_exclusive && attributes &
- (EFI_OPEN_PROTOCOL_EXCLUSIVE | EFI_OPEN_PROTOCOL_BY_DRIVER))
- return EFI_ACCESS_DENIED;
+ if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
+ if (opened_exclusive)
+ return EFI_ACCESS_DENIED;
+ } else if (attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) {
+ if (opened_exclusive || opened_by_driver)
+ return EFI_ACCESS_DENIED;
+ }
/* Prepare exclusive opening */
if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
/* Try to disconnect controllers */
+disconnect_next:
+ opened_by_driver = false;
list_for_each_entry(item, &handler->open_infos, link) {
+ efi_status_t ret;
+
if (item->info.attributes ==
- EFI_OPEN_PROTOCOL_BY_DRIVER)
- EFI_CALL(efi_disconnect_controller(
+ EFI_OPEN_PROTOCOL_BY_DRIVER) {
+ ret = EFI_CALL(efi_disconnect_controller(
item->info.controller_handle,
item->info.agent_handle,
NULL));
+ if (ret == EFI_SUCCESS)
+ /*
+ * Child controllers may have been
+ * removed from the open_infos list. So
+ * let's restart the loop.
+ */
+ goto disconnect_next;
+ else
+ opened_by_driver = true;
+ }
}
- opened_by_driver = false;
- /* Check if all controllers are disconnected */
- list_for_each_entry(item, &handler->open_infos, link) {
- if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER)
- opened_by_driver = true;
- }
- /* Only one controller can be connected */
+ /* Only one driver can be connected */
if (opened_by_driver)
return EFI_ACCESS_DENIED;
}
/* Find existing entry */
list_for_each_entry(item, &handler->open_infos, link) {
if (item->info.agent_handle == agent_handle &&
- item->info.controller_handle == controller_handle)
+ item->info.controller_handle == controller_handle &&
+ item->info.attributes == attributes)
match = &item->info;
}
/* None found, create one */
EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
/* Check parameters */
+ if (image_obj->header.type != EFI_OBJECT_TYPE_LOADED_IMAGE)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+
ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
&info, NULL, NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
* @image_obj: handle of the loaded image
* @loaded_image_protocol: loaded image protocol
*/
-static void efi_delete_image(struct efi_loaded_image_obj *image_obj,
- struct efi_loaded_image *loaded_image_protocol)
+static efi_status_t efi_delete_image
+ (struct efi_loaded_image_obj *image_obj,
+ struct efi_loaded_image *loaded_image_protocol)
{
+ struct efi_object *efiobj;
+ efi_status_t r, ret = EFI_SUCCESS;
+
+close_next:
+ list_for_each_entry(efiobj, &efi_obj_list, link) {
+ struct efi_handler *protocol;
+
+ list_for_each_entry(protocol, &efiobj->protocols, link) {
+ struct efi_open_protocol_info_item *info;
+
+ list_for_each_entry(info, &protocol->open_infos, link) {
+ if (info->info.agent_handle !=
+ (efi_handle_t)image_obj)
+ continue;
+ r = EFI_CALL(efi_close_protocol
+ (efiobj, protocol->guid,
+ info->info.agent_handle,
+ info->info.controller_handle
+ ));
+ if (r != EFI_SUCCESS)
+ ret = r;
+ /*
+ * Closing protocols may results in further
+ * items being deleted. To play it safe loop
+ * over all elements again.
+ */
+ goto close_next;
+ }
+ }
+ }
+
efi_free_pages((uintptr_t)loaded_image_protocol->image_base,
efi_size_in_pages(loaded_image_protocol->image_size));
efi_delete_handle(&image_obj->header);
+
+ return ret;
}
/**
const efi_guid_t *protocol,
void **protocol_interface)
{
- return efi_open_protocol(handle, protocol, protocol_interface, NULL,
+ return efi_open_protocol(handle, protocol, protocol_interface, efi_root,
NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
}
projects / platform / kernel / u-boot.git / blobdiff