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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
227 lines
5.7 KiB
C
227 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_events
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*
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* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* This unit test uses timer events to check the handling of
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* task priority levels.
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*/
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#include <efi_selftest.h>
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static struct efi_event *event_notify;
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static struct efi_event *event_wait;
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static unsigned int notification_count;
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static struct efi_boot_services *boottime;
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/*
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* Notification function, increments the notification count.
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*
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* @event notified event
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* @context pointer to the notification count
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*/
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static void EFIAPI notify(struct efi_event *event, void *context)
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{
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unsigned int *count = context;
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if (count)
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++*count;
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}
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/*
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* Setup unit test.
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*
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* Create two timer events.
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* One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT.
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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efi_status_t ret;
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boottime = systable->boottime;
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ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL,
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TPL_CALLBACK, notify,
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(void *)¬ification_count,
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&event_notify);
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not create event\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
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TPL_HIGH_LEVEL, notify, NULL, &event_wait);
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not create event\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Tear down unit test.
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*
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* Close the events created in setup.
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int teardown(void)
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{
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efi_status_t ret;
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if (event_notify) {
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ret = boottime->close_event(event_notify);
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event_notify = NULL;
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not close event\n");
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return EFI_ST_FAILURE;
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}
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}
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if (event_wait) {
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ret = boottime->close_event(event_wait);
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event_wait = NULL;
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not close event\n");
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return EFI_ST_FAILURE;
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}
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}
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boottime->restore_tpl(TPL_APPLICATION);
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return EFI_ST_SUCCESS;
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}
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/*
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* Execute unit test.
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*
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* Run a 10 ms periodic timer and check that it is called 10 times
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* while waiting for 100 ms single shot timer.
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*
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* Raise the TPL level to the level of the 10 ms timer and observe
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* that the notification function is not called again.
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*
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* Lower the TPL level and check that the queued notification
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* function is called.
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int execute(void)
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{
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efi_uintn_t index;
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efi_status_t ret;
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efi_uintn_t old_tpl;
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/* Set 10 ms timer */
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notification_count = 0;
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ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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/* Set 100 ms timer */
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ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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index = 5;
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ret = boottime->wait_for_event(1, &event_wait, &index);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not wait for event\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->check_event(event_wait);
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if (ret != EFI_NOT_READY) {
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efi_st_error("Signaled state was not cleared.\n");
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efi_st_printf("ret = %u\n", (unsigned int)ret);
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return EFI_ST_FAILURE;
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}
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if (index != 0) {
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efi_st_error("WaitForEvent returned wrong index\n");
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return EFI_ST_FAILURE;
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}
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if (notification_count < 8 || notification_count > 12) {
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efi_st_printf(
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"Notification count with TPL level TPL_APPLICATION: %u\n",
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notification_count);
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efi_st_error("Incorrect timing of events\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->set_timer(event_notify, EFI_TIMER_STOP, 0);
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if (index != 0) {
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efi_st_error("Could not cancel timer\n");
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return EFI_ST_FAILURE;
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}
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/* Raise TPL level */
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old_tpl = boottime->raise_tpl(TPL_CALLBACK);
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if (old_tpl != TPL_APPLICATION) {
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efi_st_error("Initial TPL level was not TPL_APPLICATION");
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return EFI_ST_FAILURE;
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}
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/* Set 10 ms timer */
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notification_count = 0;
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ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
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if (index != 0) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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/* Set 100 ms timer */
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ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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do {
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ret = boottime->check_event(event_wait);
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} while (ret == EFI_NOT_READY);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not check event\n");
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return EFI_ST_FAILURE;
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}
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if (notification_count != 0) {
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efi_st_printf(
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"Notification count with TPL level TPL_CALLBACK: %u\n",
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notification_count);
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efi_st_error("Suppressed timer fired\n");
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return EFI_ST_FAILURE;
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}
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/* Set 1 ms timer */
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ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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/* Restore the old TPL level */
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boottime->restore_tpl(TPL_APPLICATION);
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ret = boottime->wait_for_event(1, &event_wait, &index);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not wait for event\n");
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return EFI_ST_FAILURE;
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}
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if (notification_count < 1) {
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efi_st_printf(
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"Notification count with TPL level TPL_APPLICATION: %u\n",
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notification_count);
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efi_st_error("Queued timer event did not fire\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->set_timer(event_wait, EFI_TIMER_STOP, 0);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not cancel timer\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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EFI_UNIT_TEST(tpl) = {
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.name = "task priority levels",
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.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
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.setup = setup,
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.execute = execute,
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.teardown = teardown,
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};
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