コード例 #1
0
/**
 * 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;
}
コード例 #2
0
/**
 * 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.");
	}
}
コード例 #3
0
void device_resume(void)
{
	down(&dpm_sem);
	dpm_resume();
	up(&dpm_sem);
}
コード例 #4
0
ファイル: hibernate.c プロジェクト: mdamt/linux
/**
 * 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;
}
コード例 #5
0
ファイル: hibernate.c プロジェクト: vimiii/linux
/**
 * 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;
}