drivers/crypto/qat/qat_common/adf_init.c - kernel/msm-4.9 - Gitiles

 /*
   This file is provided under a dual BSD/GPLv2 license.  When using or
   redistributing this file, you may do so under either license.

   GPL LICENSE SUMMARY
   Copyright(c) 2014 Intel Corporation.
   This program is free software; you can redistribute it and/or modify
   it under the terms of version 2 of the GNU General Public License as
   published by the Free Software Foundation.

   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.

   Contact Information:
   qat-linux@intel.com

   BSD LICENSE
   Copyright(c) 2014 Intel Corporation.
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in
       the documentation and/or other materials provided with the
       distribution.
     * Neither the name of Intel Corporation nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <linux/mutex.h>
 #include <linux/list.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include "adf_accel_devices.h"
 #include "adf_cfg.h"
 #include "adf_common_drv.h"

 static LIST_HEAD(service_table);
 static DEFINE_MUTEX(service_lock);

 static void adf_service_add(struct service_hndl *service)
 {
 	mutex_lock(&service_lock);
 	list_add(&service->list, &service_table);
 	mutex_unlock(&service_lock);
 }

 /**
  * adf_service_register() - Register acceleration service in the accel framework
  * @service:    Pointer to the service
  *
  * Function adds the acceleration service to the acceleration framework.
  * To be used by QAT device specific drivers.
  *
  * Return: 0 on success, error code otherwise.
  */
 int adf_service_register(struct service_hndl *service)
 {
 	service->init_status = 0;
 	service->start_status = 0;
 	adf_service_add(service);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adf_service_register);

 static void adf_service_remove(struct service_hndl *service)
 {
 	mutex_lock(&service_lock);
 	list_del(&service->list);
 	mutex_unlock(&service_lock);
 }

 /**
  * adf_service_unregister() - Unregister acceleration service from the framework
  * @service:    Pointer to the service
  *
  * Function remove the acceleration service from the acceleration framework.
  * To be used by QAT device specific drivers.
  *
  * Return: 0 on success, error code otherwise.
  */
 int adf_service_unregister(struct service_hndl *service)
 {
 	if (service->init_status || service->start_status) {
 		pr_err("QAT: Could not remove active service\n");
 		return -EFAULT;
 	}
 	adf_service_remove(service);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adf_service_unregister);

 /**
  * adf_dev_init() - Init data structures and services for the given accel device
  * @accel_dev: Pointer to acceleration device.
  *
  * Initialize the ring data structures and the admin comms and arbitration
  * services.
  *
  * Return: 0 on success, error code otherwise.
  */
 int adf_dev_init(struct adf_accel_dev *accel_dev)
 {
 	struct service_hndl *service;
 	struct list_head *list_itr;
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;

 	if (!hw_data) {
 		dev_err(&GET_DEV(accel_dev),
 			"Failed to init device - hw_data not set\n");
 		return -EFAULT;
 	}

 	if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
 		dev_err(&GET_DEV(accel_dev), "Device not configured\n");
 		return -EFAULT;
 	}

 	if (adf_init_etr_data(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
 		return -EFAULT;
 	}

 	if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
 		return -EFAULT;
 	}

 	if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
 		return -EFAULT;
 	}

 	hw_data->enable_ints(accel_dev);

 	if (adf_ae_init(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev),
 			"Failed to initialise Acceleration Engine\n");
 		return -EFAULT;
 	}
 	set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);

 	if (adf_ae_fw_load(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev),
 			"Failed to load acceleration FW\n");
 		return -EFAULT;
 	}
 	set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);

 	if (hw_data->alloc_irq(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
 		return -EFAULT;
 	}
 	set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);

 	/*
 	 * Subservice initialisation is divided into two stages: init and start.
 	 * This is to facilitate any ordering dependencies between services
 	 * prior to starting any of the accelerators.
 	 */
 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to initialise service %s\n",
 				service->name);
 			return -EFAULT;
 		}
 		set_bit(accel_dev->accel_id, &service->init_status);
 	}

 	hw_data->enable_error_correction(accel_dev);
 	hw_data->enable_vf2pf_comms(accel_dev);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(adf_dev_init);

 /**
  * adf_dev_start() - Start acceleration service for the given accel device
  * @accel_dev:    Pointer to acceleration device.
  *
  * Function notifies all the registered services that the acceleration device
  * is ready to be used.
  * To be used by QAT device specific drivers.
  *
  * Return: 0 on success, error code otherwise.
  */
 int adf_dev_start(struct adf_accel_dev *accel_dev)
 {
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 	struct service_hndl *service;
 	struct list_head *list_itr;

 	set_bit(ADF_STATUS_STARTING, &accel_dev->status);

 	if (adf_ae_start(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
 		return -EFAULT;
 	}
 	set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);

 	if (hw_data->send_admin_init(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
 		return -EFAULT;
 	}

 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (service->event_hld(accel_dev, ADF_EVENT_START)) {
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to start service %s\n",
 				service->name);
 			return -EFAULT;
 		}
 		set_bit(accel_dev->accel_id, &service->start_status);
 	}

 	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 	set_bit(ADF_STATUS_STARTED, &accel_dev->status);

 	if (!list_empty(&accel_dev->crypto_list) &&
 	    (qat_algs_register() || qat_asym_algs_register())) {
 		dev_err(&GET_DEV(accel_dev),
 			"Failed to register crypto algs\n");
 		set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 		clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 		return -EFAULT;
 	}
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adf_dev_start);

 /**
  * adf_dev_stop() - Stop acceleration service for the given accel device
  * @accel_dev:    Pointer to acceleration device.
  *
  * Function notifies all the registered services that the acceleration device
  * is shuting down.
  * To be used by QAT device specific drivers.
  *
  * Return: 0 on success, error code otherwise.
  */
 int adf_dev_stop(struct adf_accel_dev *accel_dev)
 {
 	struct service_hndl *service;
 	struct list_head *list_itr;
 	bool wait = false;
 	int ret;

 	if (!adf_dev_started(accel_dev) &&
 	    !test_bit(ADF_STATUS_STARTING, &accel_dev->status)) {
 		return 0;
 	}
 	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);

 	if (!list_empty(&accel_dev->crypto_list) && qat_algs_unregister())
 		dev_err(&GET_DEV(accel_dev),
 			"Failed to unregister crypto algs\n");

 	if (!list_empty(&accel_dev->crypto_list))
 		qat_asym_algs_unregister();

 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (!test_bit(accel_dev->accel_id, &service->start_status))
 			continue;
 		ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
 		if (!ret) {
 			clear_bit(accel_dev->accel_id, &service->start_status);
 		} else if (ret == -EAGAIN) {
 			wait = true;
 			clear_bit(accel_dev->accel_id, &service->start_status);
 		}
 	}

 	if (wait)
 		msleep(100);

 	if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
 		if (adf_ae_stop(accel_dev))
 			dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
 		else
 			clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 	}

 	return 0;
 }
 EXPORT_SYMBOL_GPL(adf_dev_stop);

 /**
  * adf_dev_shutdown() - shutdown acceleration services and data strucutures
  * @accel_dev: Pointer to acceleration device
  *
  * Cleanup the ring data structures and the admin comms and arbitration
  * services.
  */
 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
 {
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 	struct service_hndl *service;
 	struct list_head *list_itr;

 	if (!hw_data) {
 		dev_err(&GET_DEV(accel_dev),
 			"QAT: Failed to shutdown device - hw_data not set\n");
 		return;
 	}

 	if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
 		adf_ae_fw_release(accel_dev);
 		clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 	}

 	if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
 		if (adf_ae_shutdown(accel_dev))
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to shutdown Accel Engine\n");
 		else
 			clear_bit(ADF_STATUS_AE_INITIALISED,
 				  &accel_dev->status);
 	}

 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (!test_bit(accel_dev->accel_id, &service->init_status))
 			continue;
 		if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to shutdown service %s\n",
 				service->name);
 		else
 			clear_bit(accel_dev->accel_id, &service->init_status);
 	}

 	if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
 		hw_data->free_irq(accel_dev);
 		clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 	}

 	/* Delete configuration only if not restarting */
 	if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
 		adf_cfg_del_all(accel_dev);

 	if (hw_data->exit_arb)
 		hw_data->exit_arb(accel_dev);

 	if (hw_data->exit_admin_comms)
 		hw_data->exit_admin_comms(accel_dev);

 	hw_data->disable_iov(accel_dev);
 	adf_cleanup_etr_data(accel_dev);
 }
 EXPORT_SYMBOL_GPL(adf_dev_shutdown);

 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
 {
 	struct service_hndl *service;
 	struct list_head *list_itr;

 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to restart service %s.\n",
 				service->name);
 	}
 	return 0;
 }

 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
 {
 	struct service_hndl *service;
 	struct list_head *list_itr;

 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);
 		if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
 			dev_err(&GET_DEV(accel_dev),
 				"Failed to restart service %s.\n",
 				service->name);
 	}
 	return 0;
 }
	/*
	This file is provided under a dual BSD/GPLv2 license. When using or
	redistributing this file, you may do so under either license.

	GPL LICENSE SUMMARY
	Copyright(c) 2014 Intel Corporation.
	This program is free software; you can redistribute it and/or modify
	it under the terms of version 2 of the GNU General Public License as
	published by the Free Software Foundation.

	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.

	Contact Information:
	qat-linux@intel.com

	BSD LICENSE
	Copyright(c) 2014 Intel Corporation.
	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	* Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	* Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in
	the documentation and/or other materials provided with the
	distribution.
	* Neither the name of Intel Corporation nor the names of its
	contributors may be used to endorse or promote products derived
	from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	#include <linux/mutex.h>
	#include <linux/list.h>
	#include <linux/bitops.h>
	#include <linux/delay.h>
	#include "adf_accel_devices.h"
	#include "adf_cfg.h"
	#include "adf_common_drv.h"

	static LIST_HEAD(service_table);
	static DEFINE_MUTEX(service_lock);

	static void adf_service_add(struct service_hndl *service)
	{
	mutex_lock(&service_lock);
	list_add(&service->list, &service_table);
	mutex_unlock(&service_lock);
	}

	/**
	* adf_service_register() - Register acceleration service in the accel framework
	* @service: Pointer to the service
	*
	* Function adds the acceleration service to the acceleration framework.
	* To be used by QAT device specific drivers.
	*
	* Return: 0 on success, error code otherwise.
	*/
	int adf_service_register(struct service_hndl *service)
	{
	service->init_status = 0;
	service->start_status = 0;
	adf_service_add(service);
	return 0;
	}
	EXPORT_SYMBOL_GPL(adf_service_register);

	static void adf_service_remove(struct service_hndl *service)
	{
	mutex_lock(&service_lock);
	list_del(&service->list);
	mutex_unlock(&service_lock);
	}

	/**
	* adf_service_unregister() - Unregister acceleration service from the framework
	* @service: Pointer to the service
	*
	* Function remove the acceleration service from the acceleration framework.
	* To be used by QAT device specific drivers.
	*
	* Return: 0 on success, error code otherwise.
	*/
	int adf_service_unregister(struct service_hndl *service)
	{
	if (service->init_status \|\| service->start_status) {
	pr_err("QAT: Could not remove active service\n");
	return -EFAULT;
	}
	adf_service_remove(service);
	return 0;
	}
	EXPORT_SYMBOL_GPL(adf_service_unregister);

	/**
	* adf_dev_init() - Init data structures and services for the given accel device
	* @accel_dev: Pointer to acceleration device.
	*
	* Initialize the ring data structures and the admin comms and arbitration
	* services.
	*
	* Return: 0 on success, error code otherwise.
	*/
	int adf_dev_init(struct adf_accel_dev *accel_dev)
	{
	struct service_hndl *service;
	struct list_head *list_itr;
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;

	if (!hw_data) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to init device - hw_data not set\n");
	return -EFAULT;
	}

	if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
	dev_err(&GET_DEV(accel_dev), "Device not configured\n");
	return -EFAULT;
	}

	if (adf_init_etr_data(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
	return -EFAULT;
	}

	if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
	return -EFAULT;
	}

	if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
	return -EFAULT;
	}

	hw_data->enable_ints(accel_dev);

	if (adf_ae_init(accel_dev)) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to initialise Acceleration Engine\n");
	return -EFAULT;
	}
	set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);

	if (adf_ae_fw_load(accel_dev)) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to load acceleration FW\n");
	return -EFAULT;
	}
	set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);

	if (hw_data->alloc_irq(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
	return -EFAULT;
	}
	set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);

	/*
	* Subservice initialisation is divided into two stages: init and start.
	* This is to facilitate any ordering dependencies between services
	* prior to starting any of the accelerators.
	*/
	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to initialise service %s\n",
	service->name);
	return -EFAULT;
	}
	set_bit(accel_dev->accel_id, &service->init_status);
	}

	hw_data->enable_error_correction(accel_dev);
	hw_data->enable_vf2pf_comms(accel_dev);

	return 0;
	}
	EXPORT_SYMBOL_GPL(adf_dev_init);

	/**
	* adf_dev_start() - Start acceleration service for the given accel device
	* @accel_dev: Pointer to acceleration device.
	*
	* Function notifies all the registered services that the acceleration device
	* is ready to be used.
	* To be used by QAT device specific drivers.
	*
	* Return: 0 on success, error code otherwise.
	*/
	int adf_dev_start(struct adf_accel_dev *accel_dev)
	{
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	struct service_hndl *service;
	struct list_head *list_itr;

	set_bit(ADF_STATUS_STARTING, &accel_dev->status);

	if (adf_ae_start(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
	return -EFAULT;
	}
	set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);

	if (hw_data->send_admin_init(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
	return -EFAULT;
	}

	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (service->event_hld(accel_dev, ADF_EVENT_START)) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to start service %s\n",
	service->name);
	return -EFAULT;
	}
	set_bit(accel_dev->accel_id, &service->start_status);
	}

	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
	set_bit(ADF_STATUS_STARTED, &accel_dev->status);

	if (!list_empty(&accel_dev->crypto_list) &&
	(qat_algs_register() \|\| qat_asym_algs_register())) {
	dev_err(&GET_DEV(accel_dev),
	"Failed to register crypto algs\n");
	set_bit(ADF_STATUS_STARTING, &accel_dev->status);
	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
	return -EFAULT;
	}
	return 0;
	}
	EXPORT_SYMBOL_GPL(adf_dev_start);

	/**
	* adf_dev_stop() - Stop acceleration service for the given accel device
	* @accel_dev: Pointer to acceleration device.
	*
	* Function notifies all the registered services that the acceleration device
	* is shuting down.
	* To be used by QAT device specific drivers.
	*
	* Return: 0 on success, error code otherwise.
	*/
	int adf_dev_stop(struct adf_accel_dev *accel_dev)
	{
	struct service_hndl *service;
	struct list_head *list_itr;
	bool wait = false;
	int ret;

	if (!adf_dev_started(accel_dev) &&
	!test_bit(ADF_STATUS_STARTING, &accel_dev->status)) {
	return 0;
	}
	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);

	if (!list_empty(&accel_dev->crypto_list) && qat_algs_unregister())
	dev_err(&GET_DEV(accel_dev),
	"Failed to unregister crypto algs\n");

	if (!list_empty(&accel_dev->crypto_list))
	qat_asym_algs_unregister();

	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (!test_bit(accel_dev->accel_id, &service->start_status))
	continue;
	ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
	if (!ret) {
	clear_bit(accel_dev->accel_id, &service->start_status);
	} else if (ret == -EAGAIN) {
	wait = true;
	clear_bit(accel_dev->accel_id, &service->start_status);
	}
	}

	if (wait)
	msleep(100);

	if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
	if (adf_ae_stop(accel_dev))
	dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
	else
	clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
	}

	return 0;
	}
	EXPORT_SYMBOL_GPL(adf_dev_stop);

	/**
	* adf_dev_shutdown() - shutdown acceleration services and data strucutures
	* @accel_dev: Pointer to acceleration device
	*
	* Cleanup the ring data structures and the admin comms and arbitration
	* services.
	*/
	void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
	{
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	struct service_hndl *service;
	struct list_head *list_itr;

	if (!hw_data) {
	dev_err(&GET_DEV(accel_dev),
	"QAT: Failed to shutdown device - hw_data not set\n");
	return;
	}

	if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
	adf_ae_fw_release(accel_dev);
	clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
	}

	if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
	if (adf_ae_shutdown(accel_dev))
	dev_err(&GET_DEV(accel_dev),
	"Failed to shutdown Accel Engine\n");
	else
	clear_bit(ADF_STATUS_AE_INITIALISED,
	&accel_dev->status);
	}

	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (!test_bit(accel_dev->accel_id, &service->init_status))
	continue;
	if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
	dev_err(&GET_DEV(accel_dev),
	"Failed to shutdown service %s\n",
	service->name);
	else
	clear_bit(accel_dev->accel_id, &service->init_status);
	}

	if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
	hw_data->free_irq(accel_dev);
	clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
	}

	/* Delete configuration only if not restarting */
	if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
	adf_cfg_del_all(accel_dev);

	if (hw_data->exit_arb)
	hw_data->exit_arb(accel_dev);

	if (hw_data->exit_admin_comms)
	hw_data->exit_admin_comms(accel_dev);

	hw_data->disable_iov(accel_dev);
	adf_cleanup_etr_data(accel_dev);
	}
	EXPORT_SYMBOL_GPL(adf_dev_shutdown);

	int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
	{
	struct service_hndl *service;
	struct list_head *list_itr;

	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
	dev_err(&GET_DEV(accel_dev),
	"Failed to restart service %s.\n",
	service->name);
	}
	return 0;
	}

	int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
	{
	struct service_hndl *service;
	struct list_head *list_itr;

	list_for_each(list_itr, &service_table) {
	service = list_entry(list_itr, struct service_hndl, list);
	if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
	dev_err(&GET_DEV(accel_dev),
	"Failed to restart service %s.\n",
	service->name);
	}
	return 0;
	}