lib/efi_selftest/efi_selftest_events.c

   1 /*
   2  * efi_selftest_events
   3  *
   4  * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  *
   8  * This unit test uses timer events to check the implementation
   9  * of the following boottime services:
  10  * CreateEvent, CloseEvent, WaitForEvent, CheckEvent, SetTimer.
  11  */
  12
  13 #include <efi_selftest.h>
  14
  15 static struct efi_event *event_notify;
  16 static struct efi_event *event_wait;
  17 static unsigned int timer_ticks;
  18 static struct efi_boot_services *boottime;
  19
  20 /*
  21  * Notification function, increments the notfication count if parameter
  22  * context is provided.
  23  *
  24  * @event       notified event
  25  * @context     pointer to the notification count
  26  */
  27 static void EFIAPI notify(struct efi_event *event, void *context)
  28 {
  29         unsigned int *count = context;
  30
  31         if (count)
  32                 ++*count;
  33 }
  34
  35 /*
  36  * Setup unit test.
  37  *
  38  * Create two timer events.
  39  * One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT.
  40  *
  41  * @handle:     handle of the loaded image
  42  * @systable:   system table
  43  * @return:     EFI_ST_SUCCESS for success
  44  */
  45 static int setup(const efi_handle_t handle,
  46                  const struct efi_system_table *systable)
  47 {
  48         efi_status_t ret;
  49
  50         boottime = systable->boottime;
  51
  52         ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL,
  53                                      TPL_CALLBACK, notify, (void *)&timer_ticks,
  54                                      &event_notify);
  55         if (ret != EFI_SUCCESS) {
  56                 efi_st_error("could not create event\n");
  57                 return EFI_ST_FAILURE;
  58         }
  59         ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
  60                                      TPL_CALLBACK, notify, NULL, &event_wait);
  61         if (ret != EFI_SUCCESS) {
  62                 efi_st_error("could not create event\n");
  63                 return EFI_ST_FAILURE;
  64         }
  65         return EFI_ST_SUCCESS;
  66 }
  67
  68 /*
  69  * Tear down unit test.
  70  *
  71  * Close the events created in setup.
  72  *
  73  * @return:     EFI_ST_SUCCESS for success
  74  */
  75 static int teardown(void)
  76 {
  77         efi_status_t ret;
  78
  79         if (event_notify) {
  80                 ret = boottime->close_event(event_notify);
  81                 event_notify = NULL;
  82                 if (ret != EFI_SUCCESS) {
  83                         efi_st_error("could not close event\n");
  84                         return EFI_ST_FAILURE;
  85                 }
  86         }
  87         if (event_wait) {
  88                 ret = boottime->close_event(event_wait);
  89                 event_wait = NULL;
  90                 if (ret != EFI_SUCCESS) {
  91                         efi_st_error("could not close event\n");
  92                         return EFI_ST_FAILURE;
  93                 }
  94         }
  95         return EFI_ST_SUCCESS;
  96 }
  97
  98 /*
  99  * Execute unit test.
 100  *
 101  * Run a 10 ms periodic timer and check that it is called 10 times
 102  * while waiting for 100 ms single shot timer.
 103  *
 104  * Run a 100 ms single shot timer and check that it is called once
 105  * while waiting for 100 ms periodic timer for two periods.
 106  *
 107  * @return:     EFI_ST_SUCCESS for success
 108  */
 109 static int execute(void)
 110 {
 111         size_t index;
 112         efi_status_t ret;
 113
 114         /* Set 10 ms timer */
 115         timer_ticks = 0;
 116         ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
 117         if (ret != EFI_SUCCESS) {
 118                 efi_st_error("Could not set timer\n");
 119                 return EFI_ST_FAILURE;
 120         }
 121         /* Set 100 ms timer */
 122         ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
 123         if (ret != EFI_SUCCESS) {
 124                 efi_st_error("Could not set timer\n");
 125                 return EFI_ST_FAILURE;
 126         }
 127
 128         /* Set some arbitrary non-zero value to make change detectable. */
 129         index = 5;
 130         ret = boottime->wait_for_event(1, &event_wait, &index);
 131         if (ret != EFI_SUCCESS) {
 132                 efi_st_error("Could not wait for event\n");
 133                 return EFI_ST_FAILURE;
 134         }
 135         ret = boottime->check_event(event_wait);
 136         if (ret != EFI_NOT_READY) {
 137                 efi_st_error("Signaled state was not cleared.\n");
 138                 efi_st_printf("ret = %u\n", (unsigned int)ret);
 139                 return EFI_ST_FAILURE;
 140         }
 141         if (index != 0) {
 142                 efi_st_error("WaitForEvent returned wrong index\n");
 143                 return EFI_ST_FAILURE;
 144         }
 145         efi_st_printf("Notification count periodic: %u\n", timer_ticks);
 146         if (timer_ticks < 8 || timer_ticks > 12) {
 147                 efi_st_error("Incorrect timing of events\n");
 148                 return EFI_ST_FAILURE;
 149         }
 150         ret = boottime->set_timer(event_notify, EFI_TIMER_STOP, 0);
 151         if (index != 0) {
 152                 efi_st_error("Could not cancel timer\n");
 153                 return EFI_ST_FAILURE;
 154         }
 155         /* Set 10 ms timer */
 156         timer_ticks = 0;
 157         ret = boottime->set_timer(event_notify, EFI_TIMER_RELATIVE, 100000);
 158         if (index != 0) {
 159                 efi_st_error("Could not set timer\n");
 160                 return EFI_ST_FAILURE;
 161         }
 162         /* Set 100 ms timer */
 163         ret = boottime->set_timer(event_wait, EFI_TIMER_PERIODIC, 1000000);
 164         if (index != 0) {
 165                 efi_st_error("Could not set timer\n");
 166                 return EFI_ST_FAILURE;
 167         }
 168         ret = boottime->wait_for_event(1, &event_wait, &index);
 169         if (ret != EFI_SUCCESS) {
 170                 efi_st_error("Could not wait for event\n");
 171                 return EFI_ST_FAILURE;
 172         }
 173         efi_st_printf("Notification count single shot: %u\n", timer_ticks);
 174         if (timer_ticks != 1) {
 175                 efi_st_error("Single shot timer failed\n");
 176                 return EFI_ST_FAILURE;
 177         }
 178         ret = boottime->wait_for_event(1, &event_wait, &index);
 179         if (ret != EFI_SUCCESS) {
 180                 efi_st_error("Could not wait for event\n");
 181                 return EFI_ST_FAILURE;
 182         }
 183         efi_st_printf("Notification count stopped timer: %u\n", timer_ticks);
 184         if (timer_ticks != 1) {
 185                 efi_st_error("Stopped timer fired\n");
 186                 return EFI_ST_FAILURE;
 187         }
 188         ret = boottime->set_timer(event_wait, EFI_TIMER_STOP, 0);
 189         if (index != 0) {
 190                 efi_st_error("Could not cancel timer\n");
 191                 return EFI_ST_FAILURE;
 192         }
 193
 194         return EFI_ST_SUCCESS;
 195 }
 196
 197 EFI_UNIT_TEST(events) = {
 198         .name = "event services",
 199         .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
 200         .setup = setup,
 201         .execute = execute,
 202         .teardown = teardown,
 203 };