bifrost/r32p1/kernel/drivers/gpu/arm/midgard/mali_kbase_pm.c - manifest_repos/mali-driver - Git at Google

 // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
 /*
  *
  * (C) COPYRIGHT 2010-2021 ARM Limited. All rights reserved.
  *
  * This program is free software and is provided to you under the terms of the
  * GNU General Public License version 2 as published by the Free Software
  * Foundation, and any use by you of this program is subject to the terms
  * of such GNU license.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, you can access it online at
  * http://www.gnu.org/licenses/gpl-2.0.html.
  *
  */

 /**
  * DOC: Base kernel power management APIs
  */

 #include <mali_kbase.h>
 #include <gpu/mali_kbase_gpu_regmap.h>
 #include <mali_kbase_vinstr.h>
 #include <mali_kbase_hwcnt_context.h>

 #include <mali_kbase_pm.h>
 #include <backend/gpu/mali_kbase_pm_internal.h>

 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 #include <arbiter/mali_kbase_arbiter_pm.h>
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */

 #include <backend/gpu/mali_kbase_clk_rate_trace_mgr.h>

 int kbase_pm_powerup(struct kbase_device *kbdev, unsigned int flags)
 {
 	return kbase_hwaccess_pm_powerup(kbdev, flags);
 }

 void kbase_pm_halt(struct kbase_device *kbdev)
 {
 	kbase_hwaccess_pm_halt(kbdev);
 }

 void kbase_pm_context_active(struct kbase_device *kbdev)
 {
 	(void)kbase_pm_context_active_handle_suspend(kbdev,
 		KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE);
 }

 int kbase_pm_context_active_handle_suspend(struct kbase_device *kbdev,
 	enum kbase_pm_suspend_handler suspend_handler)
 {
 	int c;

 	KBASE_DEBUG_ASSERT(kbdev != NULL);
 	dev_dbg(kbdev->dev, "%s - reason = %d, pid = %d\n", __func__,
 		suspend_handler, current->pid);
 	kbase_pm_lock(kbdev);

 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbase_arbiter_pm_ctx_active_handle_suspend(kbdev,
 			suspend_handler)) {
 		kbase_pm_unlock(kbdev);
 		return 1;
 	}
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */

 	if (kbase_pm_is_suspending(kbdev)) {
 		switch (suspend_handler) {
 		case KBASE_PM_SUSPEND_HANDLER_DONT_REACTIVATE:
 			if (kbdev->pm.active_count != 0)
 				break;
 			/* FALLTHROUGH */
 		case KBASE_PM_SUSPEND_HANDLER_DONT_INCREASE:
 			kbase_pm_unlock(kbdev);
 			return 1;

 		case KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE:
 			/* FALLTHROUGH */
 		default:
 			KBASE_DEBUG_ASSERT_MSG(false, "unreachable");
 			break;
 		}
 	}
 	c = ++kbdev->pm.active_count;
 	KBASE_KTRACE_ADD(kbdev, PM_CONTEXT_ACTIVE, NULL, c);

 	if (c == 1) {
 		/* First context active: Power on the GPU and
 		 * any cores requested by the policy
 		 */
 		kbase_hwaccess_pm_gpu_active(kbdev);
 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 		kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_REF_EVENT);
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */
 		kbase_clk_rate_trace_manager_gpu_active(kbdev);
 	}

 	kbase_pm_unlock(kbdev);
 	dev_dbg(kbdev->dev, "%s %d\n", __func__, kbdev->pm.active_count);

 	return 0;
 }

 KBASE_EXPORT_TEST_API(kbase_pm_context_active);

 void kbase_pm_context_idle(struct kbase_device *kbdev)
 {
 	int c;

 	KBASE_DEBUG_ASSERT(kbdev != NULL);


 	kbase_pm_lock(kbdev);

 	c = --kbdev->pm.active_count;
 	KBASE_KTRACE_ADD(kbdev, PM_CONTEXT_IDLE, NULL, c);

 	KBASE_DEBUG_ASSERT(c >= 0);

 	if (c == 0) {
 		/* Last context has gone idle */
 		kbase_hwaccess_pm_gpu_idle(kbdev);
 		kbase_clk_rate_trace_manager_gpu_idle(kbdev);

 		/* Wake up anyone waiting for this to become 0 (e.g. suspend).
 		 * The waiters must synchronize with us by locking the pm.lock
 		 * after waiting.
 		 */
 		wake_up(&kbdev->pm.zero_active_count_wait);
 	}

 	kbase_pm_unlock(kbdev);
 	dev_dbg(kbdev->dev, "%s %d (pid = %d)\n", __func__,
 		kbdev->pm.active_count, current->pid);
 }

 KBASE_EXPORT_TEST_API(kbase_pm_context_idle);

 void kbase_pm_driver_suspend(struct kbase_device *kbdev)
 {
 	KBASE_DEBUG_ASSERT(kbdev);

 	/* Suspend vinstr. This blocks until the vinstr worker and timer are
 	 * no longer running.
 	 */
 	kbase_vinstr_suspend(kbdev->vinstr_ctx);

 	/* Disable GPU hardware counters.
 	 * This call will block until counters are disabled.
 	 */
 	kbase_hwcnt_context_disable(kbdev->hwcnt_gpu_ctx);

 	mutex_lock(&kbdev->pm.lock);
 	if (WARN_ON(kbase_pm_is_suspending(kbdev))) {
 		mutex_unlock(&kbdev->pm.lock);
 		return;
 	}
 	kbdev->pm.suspending = true;
 	mutex_unlock(&kbdev->pm.lock);

 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbdev->arb.arb_if) {
 		int i;
 		unsigned long flags;

 		spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
 		kbdev->js_data.runpool_irq.submit_allowed = 0;
 		kbase_disjoint_state_up(kbdev);
 		for (i = 0; i < kbdev->gpu_props.num_job_slots; i++)
 			kbase_job_slot_softstop(kbdev, i, NULL);
 		spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
 	}
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */

 	/* From now on, the active count will drop towards zero. Sometimes,
 	 * it'll go up briefly before going down again. However, once
 	 * it reaches zero it will stay there - guaranteeing that we've idled
 	 * all pm references
 	 */

 #if !MALI_USE_CSF
 	/* Suspend job scheduler and associated components, so that it releases all
 	 * the PM active count references
 	 */
 	kbasep_js_suspend(kbdev);
 #else
 	kbase_csf_scheduler_pm_suspend(kbdev);
 #endif

 	/* Wait for the active count to reach zero. This is not the same as
 	 * waiting for a power down, since not all policies power down when this
 	 * reaches zero.
 	 */
 	dev_dbg(kbdev->dev, ">wait_event - waiting for active_count == 0 (pid = %d)\n",
 		current->pid);
 	wait_event(kbdev->pm.zero_active_count_wait,
 		kbdev->pm.active_count == 0);
 	dev_dbg(kbdev->dev, ">wait_event - waiting done\n");

 	/* NOTE: We synchronize with anything that was just finishing a
 	 * kbase_pm_context_idle() call by locking the pm.lock below
 	 */
 	kbase_hwaccess_pm_suspend(kbdev);

 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbdev->arb.arb_if) {
 		mutex_lock(&kbdev->pm.arb_vm_state->vm_state_lock);
 		kbase_arbiter_pm_vm_stopped(kbdev);
 		mutex_unlock(&kbdev->pm.arb_vm_state->vm_state_lock);
 	}
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */
 }

 void kbase_pm_driver_resume(struct kbase_device *kbdev, bool arb_gpu_start)
 {
 	unsigned long flags;

 	/* MUST happen before any pm_context_active calls occur */
 	kbase_hwaccess_pm_resume(kbdev);

 	/* Initial active call, to power on the GPU/cores if needed */
 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbase_pm_context_active_handle_suspend(kbdev,
 			(arb_gpu_start ?
 				KBASE_PM_SUSPEND_HANDLER_VM_GPU_GRANTED :
 				KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE)))
 		return;
 #else
 	kbase_pm_context_active(kbdev);
 #endif

 #if !MALI_USE_CSF
 	/* Resume any blocked atoms (which may cause contexts to be scheduled in
 	 * and dependent atoms to run)
 	 */
 	kbase_resume_suspended_soft_jobs(kbdev);

 	/* Resume the Job Scheduler and associated components, and start running
 	 * atoms
 	 */
 	kbasep_js_resume(kbdev);
 #else
 	kbase_csf_scheduler_pm_resume(kbdev);
 #endif

 	/* Matching idle call, to power off the GPU/cores if we didn't actually
 	 * need it and the policy doesn't want it on
 	 */
 	kbase_pm_context_idle(kbdev);

 	/* Re-enable GPU hardware counters */
 #if MALI_USE_CSF
 	kbase_csf_scheduler_spin_lock(kbdev, &flags);
 	kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
 	kbase_csf_scheduler_spin_unlock(kbdev, flags);
 #else
 	spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
 	kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
 	spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
 #endif

 	/* Resume vinstr */
 	kbase_vinstr_resume(kbdev->vinstr_ctx);
 }

 void kbase_pm_suspend(struct kbase_device *kbdev)
 {
 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbdev->arb.arb_if)
 		kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_OS_SUSPEND_EVENT);
 	else
 		kbase_pm_driver_suspend(kbdev);
 #else
 	kbase_pm_driver_suspend(kbdev);
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */
 }

 void kbase_pm_resume(struct kbase_device *kbdev)
 {
 #ifdef CONFIG_MALI_ARBITER_SUPPORT
 	if (kbdev->arb.arb_if)
 		kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_OS_RESUME_EVENT);
 	else
 		kbase_pm_driver_resume(kbdev, false);
 #else
 	kbase_pm_driver_resume(kbdev, false);
 #endif /* CONFIG_MALI_ARBITER_SUPPORT */
 }
	// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
	/*
	*
	* (C) COPYRIGHT 2010-2021 ARM Limited. All rights reserved.
	*
	* This program is free software and is provided to you under the terms of the
	* GNU General Public License version 2 as published by the Free Software
	* Foundation, and any use by you of this program is subject to the terms
	* of such GNU license.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, you can access it online at
	* http://www.gnu.org/licenses/gpl-2.0.html.
	*
	*/

	/**
	* DOC: Base kernel power management APIs
	*/

	#include <mali_kbase.h>
	#include <gpu/mali_kbase_gpu_regmap.h>
	#include <mali_kbase_vinstr.h>
	#include <mali_kbase_hwcnt_context.h>

	#include <mali_kbase_pm.h>
	#include <backend/gpu/mali_kbase_pm_internal.h>

	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	#include <arbiter/mali_kbase_arbiter_pm.h>
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */

	#include <backend/gpu/mali_kbase_clk_rate_trace_mgr.h>

	int kbase_pm_powerup(struct kbase_device *kbdev, unsigned int flags)
	{
	return kbase_hwaccess_pm_powerup(kbdev, flags);
	}

	void kbase_pm_halt(struct kbase_device *kbdev)
	{
	kbase_hwaccess_pm_halt(kbdev);
	}

	void kbase_pm_context_active(struct kbase_device *kbdev)
	{
	(void)kbase_pm_context_active_handle_suspend(kbdev,
	KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE);
	}

	int kbase_pm_context_active_handle_suspend(struct kbase_device *kbdev,
	enum kbase_pm_suspend_handler suspend_handler)
	{
	int c;

	KBASE_DEBUG_ASSERT(kbdev != NULL);
	dev_dbg(kbdev->dev, "%s - reason = %d, pid = %d\n", __func__,
	suspend_handler, current->pid);
	kbase_pm_lock(kbdev);

	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbase_arbiter_pm_ctx_active_handle_suspend(kbdev,
	suspend_handler)) {
	kbase_pm_unlock(kbdev);
	return 1;
	}
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */

	if (kbase_pm_is_suspending(kbdev)) {
	switch (suspend_handler) {
	case KBASE_PM_SUSPEND_HANDLER_DONT_REACTIVATE:
	if (kbdev->pm.active_count != 0)
	break;
	/* FALLTHROUGH */
	case KBASE_PM_SUSPEND_HANDLER_DONT_INCREASE:
	kbase_pm_unlock(kbdev);
	return 1;

	case KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE:
	/* FALLTHROUGH */
	default:
	KBASE_DEBUG_ASSERT_MSG(false, "unreachable");
	break;
	}
	}
	c = ++kbdev->pm.active_count;
	KBASE_KTRACE_ADD(kbdev, PM_CONTEXT_ACTIVE, NULL, c);

	if (c == 1) {
	/* First context active: Power on the GPU and
	* any cores requested by the policy
	*/
	kbase_hwaccess_pm_gpu_active(kbdev);
	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_REF_EVENT);
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */
	kbase_clk_rate_trace_manager_gpu_active(kbdev);
	}

	kbase_pm_unlock(kbdev);
	dev_dbg(kbdev->dev, "%s %d\n", __func__, kbdev->pm.active_count);

	return 0;
	}

	KBASE_EXPORT_TEST_API(kbase_pm_context_active);

	void kbase_pm_context_idle(struct kbase_device *kbdev)
	{
	int c;

	KBASE_DEBUG_ASSERT(kbdev != NULL);


	kbase_pm_lock(kbdev);

	c = --kbdev->pm.active_count;
	KBASE_KTRACE_ADD(kbdev, PM_CONTEXT_IDLE, NULL, c);

	KBASE_DEBUG_ASSERT(c >= 0);

	if (c == 0) {
	/* Last context has gone idle */
	kbase_hwaccess_pm_gpu_idle(kbdev);
	kbase_clk_rate_trace_manager_gpu_idle(kbdev);

	/* Wake up anyone waiting for this to become 0 (e.g. suspend).
	* The waiters must synchronize with us by locking the pm.lock
	* after waiting.
	*/
	wake_up(&kbdev->pm.zero_active_count_wait);
	}

	kbase_pm_unlock(kbdev);
	dev_dbg(kbdev->dev, "%s %d (pid = %d)\n", __func__,
	kbdev->pm.active_count, current->pid);
	}

	KBASE_EXPORT_TEST_API(kbase_pm_context_idle);

	void kbase_pm_driver_suspend(struct kbase_device *kbdev)
	{
	KBASE_DEBUG_ASSERT(kbdev);

	/* Suspend vinstr. This blocks until the vinstr worker and timer are
	* no longer running.
	*/
	kbase_vinstr_suspend(kbdev->vinstr_ctx);

	/* Disable GPU hardware counters.
	* This call will block until counters are disabled.
	*/
	kbase_hwcnt_context_disable(kbdev->hwcnt_gpu_ctx);

	mutex_lock(&kbdev->pm.lock);
	if (WARN_ON(kbase_pm_is_suspending(kbdev))) {
	mutex_unlock(&kbdev->pm.lock);
	return;
	}
	kbdev->pm.suspending = true;
	mutex_unlock(&kbdev->pm.lock);

	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbdev->arb.arb_if) {
	int i;
	unsigned long flags;

	spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
	kbdev->js_data.runpool_irq.submit_allowed = 0;
	kbase_disjoint_state_up(kbdev);
	for (i = 0; i < kbdev->gpu_props.num_job_slots; i++)
	kbase_job_slot_softstop(kbdev, i, NULL);
	spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
	}
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */

	/* From now on, the active count will drop towards zero. Sometimes,
	* it'll go up briefly before going down again. However, once
	* it reaches zero it will stay there - guaranteeing that we've idled
	* all pm references
	*/

	#if !MALI_USE_CSF
	/* Suspend job scheduler and associated components, so that it releases all
	* the PM active count references
	*/
	kbasep_js_suspend(kbdev);
	#else
	kbase_csf_scheduler_pm_suspend(kbdev);
	#endif

	/* Wait for the active count to reach zero. This is not the same as
	* waiting for a power down, since not all policies power down when this
	* reaches zero.
	*/
	dev_dbg(kbdev->dev, ">wait_event - waiting for active_count == 0 (pid = %d)\n",
	current->pid);
	wait_event(kbdev->pm.zero_active_count_wait,
	kbdev->pm.active_count == 0);
	dev_dbg(kbdev->dev, ">wait_event - waiting done\n");

	/* NOTE: We synchronize with anything that was just finishing a
	* kbase_pm_context_idle() call by locking the pm.lock below
	*/
	kbase_hwaccess_pm_suspend(kbdev);

	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbdev->arb.arb_if) {
	mutex_lock(&kbdev->pm.arb_vm_state->vm_state_lock);
	kbase_arbiter_pm_vm_stopped(kbdev);
	mutex_unlock(&kbdev->pm.arb_vm_state->vm_state_lock);
	}
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */
	}

	void kbase_pm_driver_resume(struct kbase_device *kbdev, bool arb_gpu_start)
	{
	unsigned long flags;

	/* MUST happen before any pm_context_active calls occur */
	kbase_hwaccess_pm_resume(kbdev);

	/* Initial active call, to power on the GPU/cores if needed */
	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbase_pm_context_active_handle_suspend(kbdev,
	(arb_gpu_start ?
	KBASE_PM_SUSPEND_HANDLER_VM_GPU_GRANTED :
	KBASE_PM_SUSPEND_HANDLER_NOT_POSSIBLE)))
	return;
	#else
	kbase_pm_context_active(kbdev);
	#endif

	#if !MALI_USE_CSF
	/* Resume any blocked atoms (which may cause contexts to be scheduled in
	* and dependent atoms to run)
	*/
	kbase_resume_suspended_soft_jobs(kbdev);

	/* Resume the Job Scheduler and associated components, and start running
	* atoms
	*/
	kbasep_js_resume(kbdev);
	#else
	kbase_csf_scheduler_pm_resume(kbdev);
	#endif

	/* Matching idle call, to power off the GPU/cores if we didn't actually
	* need it and the policy doesn't want it on
	*/
	kbase_pm_context_idle(kbdev);

	/* Re-enable GPU hardware counters */
	#if MALI_USE_CSF
	kbase_csf_scheduler_spin_lock(kbdev, &flags);
	kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
	kbase_csf_scheduler_spin_unlock(kbdev, flags);
	#else
	spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
	kbase_hwcnt_context_enable(kbdev->hwcnt_gpu_ctx);
	spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
	#endif

	/* Resume vinstr */
	kbase_vinstr_resume(kbdev->vinstr_ctx);
	}

	void kbase_pm_suspend(struct kbase_device *kbdev)
	{
	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbdev->arb.arb_if)
	kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_OS_SUSPEND_EVENT);
	else
	kbase_pm_driver_suspend(kbdev);
	#else
	kbase_pm_driver_suspend(kbdev);
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */
	}

	void kbase_pm_resume(struct kbase_device *kbdev)
	{
	#ifdef CONFIG_MALI_ARBITER_SUPPORT
	if (kbdev->arb.arb_if)
	kbase_arbiter_pm_vm_event(kbdev, KBASE_VM_OS_RESUME_EVENT);
	else
	kbase_pm_driver_resume(kbdev, false);
	#else
	kbase_pm_driver_resume(kbdev, false);
	#endif /* CONFIG_MALI_ARBITER_SUPPORT */
	}