/**
* hibernation_snapshot - Quiesce devices and create a hibernation image.
* @platform_mode: If set, use platform driver to prepare for the transition.
*
* This routine must be called with pm_mutex held.
*/
int hibernation_snapshot(int platform_mode)
{
pm_message_t msg = PMSG_RECOVER;
int error;
error = platform_begin(platform_mode);
if (error)
goto Close;
error = dpm_prepare(PMSG_FREEZE);
if (error)
goto Complete_devices;
/* Preallocate image memory before shutting down devices. */
error = hibernate_preallocate_memory();
if (error)
goto Complete_devices;
suspend_console();
ftrace_stop();
pm_restrict_gfp_mask();
error = dpm_suspend(PMSG_FREEZE);
if (error)
goto Recover_platform;
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = create_image(platform_mode);
/*
* Control returns here (1) after the image has been created or the
* image creation has failed and (2) after a successful restore.
*/
Resume_devices:
/* We may need to release the preallocated image pages here. */
if (error || !in_suspend)
swsusp_free();
msg = in_suspend ? (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE;
dpm_resume(msg);
if (error || !in_suspend)
pm_restore_gfp_mask();
ftrace_start();
resume_console();
Complete_devices:
dpm_complete(msg);
Close:
platform_end(platform_mode);
return error;
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
}
int hibernation_snapshot(int platform_mode)
{
int error;
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (error)
return error;
error = platform_begin(platform_mode);
if (error)
goto Close;
suspend_console();
error = device_suspend(PMSG_FREEZE);
if (error)
goto Recover_platform;
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = platform_pre_snapshot(platform_mode);
if (error || hibernation_test(TEST_PLATFORM))
goto Finish;
error = disable_nonboot_cpus();
if (!error) {
if (hibernation_test(TEST_CPUS))
goto Enable_cpus;
if (hibernation_testmode(HIBERNATION_TEST))
goto Enable_cpus;
error = create_image(platform_mode);
/* Control returns here after successful restore */
}
Enable_cpus:
enable_nonboot_cpus();
Finish:
platform_finish(platform_mode);
Resume_devices:
device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
resume_console();
Close:
platform_end(platform_mode);
return error;
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
}
/**
* suspend_devices_and_enter - Suspend devices and enter system sleep state.
* @state: System sleep state to enter.
*/
int suspend_devices_and_enter(suspend_state_t state)
{
int error;
bool wakeup = false;
if (!sleep_state_supported(state))
return -ENOSYS;
pm_suspend_target_state = state;
error = platform_suspend_begin(state);
if (error)
goto Close;
suspend_console();
suspend_test_start();
error = dpm_suspend_start(PMSG_SUSPEND);
if (error) {
pr_err("Some devices failed to suspend, or early wake event detected\n");
goto Recover_platform;
}
suspend_test_finish("suspend devices");
if (suspend_test(TEST_DEVICES))
goto Recover_platform;
do {
error = suspend_enter(state, &wakeup);
} while (!error && !wakeup && platform_suspend_again(state));
Resume_devices:
suspend_test_start();
dpm_resume_end(PMSG_RESUME);
suspend_test_finish("resume devices");
trace_suspend_resume(TPS("resume_console"), state, true);
resume_console();
trace_suspend_resume(TPS("resume_console"), state, false);
Close:
platform_resume_end(state);
pm_suspend_target_state = PM_SUSPEND_ON;
return error;
Recover_platform:
platform_recover(state);
goto Resume_devices;
}
int hibernation_snapshot(int platform_mode)
{
int error;
gfp_t saved_mask;
error = platform_begin(platform_mode);
if (error)
return error;
/* Preallocate image memory before shutting down devices. */
error = hibernate_preallocate_memory();
if (error)
goto Close;
suspend_console();
saved_mask = clear_gfp_allowed_mask(GFP_IOFS);
error = dpm_suspend_start(PMSG_FREEZE);
if (error)
goto Recover_platform;
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = create_image(platform_mode);
/* Control returns here after successful restore */
Resume_devices:
/* We may need to release the preallocated image pages here. */
if (error || !in_suspend)
swsusp_free();
dpm_resume_end(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
set_gfp_allowed_mask(saved_mask);
resume_console();
Close:
platform_end(platform_mode);
return error;
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
}
/**
* toi_end_atomic - post atomic copy/restore routines
* @stage: What step to start at.
* @suspend_time: Whether we're suspending or resuming.
* @error: Whether we're recovering from an error.
**/
void toi_end_atomic(int stage, int suspend_time, int error)
{
pm_message_t msg = suspend_time ? (error ? PMSG_RECOVER : PMSG_THAW) :
PMSG_RESTORE;
switch (stage) {
case ATOMIC_ALL_STEPS:
if (!suspend_time) {
events_check_enabled = false;
platform_leave(1);
}
case ATOMIC_STEP_SYSCORE_RESUME:
syscore_resume();
case ATOMIC_STEP_IRQS:
local_irq_enable();
case ATOMIC_STEP_CPU_HOTPLUG:
if (test_action_state(TOI_LATE_CPU_HOTPLUG))
enable_nonboot_cpus();
case ATOMIC_STEP_PLATFORM_FINISH:
if (!suspend_time && error & 2)
platform_restore_cleanup(1);
else
platform_finish(1);
dpm_resume_start(msg);
case ATOMIC_STEP_DEVICE_RESUME:
if (suspend_time && (error & 2))
platform_recover(1);
dpm_resume(msg);
if (error || !toi_in_suspend())
pm_restore_gfp_mask();
ftrace_start();
resume_console();
case ATOMIC_STEP_DPM_COMPLETE:
dpm_complete(msg);
case ATOMIC_STEP_PLATFORM_END:
platform_end(1);
toi_prepare_status(DONT_CLEAR_BAR, "Post atomic.");
}
}
int hibernation_snapshot(int platform_mode)
{
int error;
error = platform_begin(platform_mode);
if (error)
return error;
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (error)
goto Close;
suspend_console();
error = dpm_suspend_start(PMSG_FREEZE);
if (error)
goto Recover_platform;
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = create_image(platform_mode);
/* Control returns here after successful restore */
Resume_devices:
dpm_resume_end(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
resume_console();
Close:
platform_end(platform_mode);
return error;
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
}
/**
* hibernation_snapshot - Quiesce devices and create a hibernation image.
* @platform_mode: If set, use platform driver to prepare for the transition.
*
* This routine must be called with pm_mutex held.
*/
int hibernation_snapshot(int platform_mode)
{
pm_message_t msg;
int error;
pm_suspend_clear_flags();
error = platform_begin(platform_mode);
if (error)
goto Close;
/* Preallocate image memory before shutting down devices. */
error = hibernate_preallocate_memory();
if (error)
goto Close;
error = freeze_kernel_threads();
if (error)
goto Cleanup;
if (hibernation_test(TEST_FREEZER)) {
/*
* Indicate to the caller that we are returning due to a
* successful freezer test.
*/
freezer_test_done = true;
goto Thaw;
}
error = dpm_prepare(PMSG_FREEZE);
if (error) {
dpm_complete(PMSG_RECOVER);
goto Thaw;
}
suspend_console();
pm_restrict_gfp_mask();
error = dpm_suspend(PMSG_FREEZE);
if (error || hibernation_test(TEST_DEVICES))
platform_recover(platform_mode);
else
error = create_image(platform_mode);
/*
* In the case that we call create_image() above, the control
* returns here (1) after the image has been created or the
* image creation has failed and (2) after a successful restore.
*/
/* We may need to release the preallocated image pages here. */
if (error || !in_suspend)
swsusp_free();
msg = in_suspend ? (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE;
dpm_resume(msg);
if (error || !in_suspend)
pm_restore_gfp_mask();
resume_console();
dpm_complete(msg);
Close:
platform_end(platform_mode);
return error;
Thaw:
thaw_kernel_threads();
Cleanup:
swsusp_free();
goto Close;
}
/**
* hibernation_snapshot - Quiesce devices and create a hibernation image.
* @platform_mode: If set, use platform driver to prepare for the transition.
*
* This routine must be called with pm_mutex held.
*/
int hibernation_snapshot(int platform_mode)
{
pm_message_t msg = PMSG_RECOVER;
int error;
error = platform_begin(platform_mode);
if (error)
goto Close;
/* Preallocate image memory before shutting down devices. */
error = hibernate_preallocate_memory();
if (error)
goto Close;
error = freeze_kernel_threads();
if (error)
goto Close;
if (hibernation_test(TEST_FREEZER) ||
hibernation_testmode(HIBERNATION_TESTPROC)) {
/*
* Indicate to the caller that we are returning due to a
* successful freezer test.
*/
freezer_test_done = true;
goto Close;
}
error = dpm_prepare(PMSG_FREEZE);
if (error)
goto Complete_devices;
suspend_console();
pm_restrict_gfp_mask();
error = dpm_suspend(PMSG_FREEZE);
if (error)
goto Recover_platform;
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = create_image(platform_mode);
/*
* Control returns here (1) after the image has been created or the
* image creation has failed and (2) after a successful restore.
*/
Resume_devices:
/* We may need to release the preallocated image pages here. */
if (error || !in_suspend)
swsusp_free();
msg = in_suspend ? (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE;
dpm_resume(msg);
if (error || !in_suspend)
pm_restore_gfp_mask();
resume_console();
Complete_devices:
dpm_complete(msg);
Close:
platform_end(platform_mode);
return error;
Recover_platform:
platform_recover(platform_mode);
goto Resume_devices;
}
