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https://github.com/AsahiLinux/u-boot
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d8b2216c87
fix typos correct the header comment of efi_selftest_variables.c Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
226 lines
5.7 KiB
C
226 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_tpl
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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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