[deliverable/linux.git] / drivers / crypto / qat / qat_common / adf_init.c

/*
  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);
}

int adf_service_register(struct service_hndl *service)
{
	service->init_status = 0;
	service->start_status = 0;
	adf_service_add(service);
	return 0;
}

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

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;
}

/**
 * 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: void
 */
void 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;

	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();
		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);
	}
}
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);
	adf_dev_restore(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;
}
Commit	Line	Data
	1	/*
	2	This file is provided under a dual BSD/GPLv2 license. When using or
	3	redistributing this file, you may do so under either license.
	4
	5	GPL LICENSE SUMMARY
	6	Copyright(c) 2014 Intel Corporation.
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of version 2 of the GNU General Public License as
	9	published by the Free Software Foundation.
	10
	11	This program is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	General Public License for more details.
	15
	16	Contact Information:
	17	qat-linux@intel.com
	18
	19	BSD LICENSE
	20	Copyright(c) 2014 Intel Corporation.
	21	Redistribution and use in source and binary forms, with or without
	22	modification, are permitted provided that the following conditions
	23	are met:
	24
	25	* Redistributions of source code must retain the above copyright
	26	notice, this list of conditions and the following disclaimer.
	27	* Redistributions in binary form must reproduce the above copyright
	28	notice, this list of conditions and the following disclaimer in
	29	the documentation and/or other materials provided with the
	30	distribution.
	31	* Neither the name of Intel Corporation nor the names of its
	32	contributors may be used to endorse or promote products derived
	33	from this software without specific prior written permission.
	34
	35	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	36	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	37	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	38	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	39	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	40	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	41	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	42	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	43	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	44	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	45	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	46	*/
	47	#include <linux/mutex.h>
	48	#include <linux/list.h>
	49	#include <linux/bitops.h>
	50	#include <linux/delay.h>
	51	#include "adf_accel_devices.h"
	52	#include "adf_cfg.h"
	53	#include "adf_common_drv.h"
	54
	55	static LIST_HEAD(service_table);
	56	static DEFINE_MUTEX(service_lock);
	57
	58	static void adf_service_add(struct service_hndl *service)
	59	{
	60	mutex_lock(&service_lock);
	61	list_add(&service->list, &service_table);
	62	mutex_unlock(&service_lock);
	63	}
	64
	65	int adf_service_register(struct service_hndl *service)
	66	{
	67	service->init_status = 0;
	68	service->start_status = 0;
	69	adf_service_add(service);
	70	return 0;
	71	}
	72
	73	static void adf_service_remove(struct service_hndl *service)
	74	{
	75	mutex_lock(&service_lock);
	76	list_del(&service->list);
	77	mutex_unlock(&service_lock);
	78	}
	79
	80	int adf_service_unregister(struct service_hndl *service)
	81	{
	82	if (service->init_status \|\| service->start_status) {
	83	pr_err("QAT: Could not remove active service\n");
	84	return -EFAULT;
	85	}
	86	adf_service_remove(service);
	87	return 0;
	88	}
	89
	90	/**
	91	* adf_dev_init() - Init data structures and services for the given accel device
	92	* @accel_dev: Pointer to acceleration device.
	93	*
	94	* Initialize the ring data structures and the admin comms and arbitration
	95	* services.
	96	*
	97	* Return: 0 on success, error code otherwise.
	98	*/
	99	int adf_dev_init(struct adf_accel_dev *accel_dev)
	100	{
	101	struct service_hndl *service;
	102	struct list_head *list_itr;
	103	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	104
	105	if (!hw_data) {
	106	dev_err(&GET_DEV(accel_dev),
	107	"Failed to init device - hw_data not set\n");
	108	return -EFAULT;
	109	}
	110
	111	if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
	112	dev_err(&GET_DEV(accel_dev), "Device not configured\n");
	113	return -EFAULT;
	114	}
	115
	116	if (adf_init_etr_data(accel_dev)) {
	117	dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
	118	return -EFAULT;
	119	}
	120
	121	if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
	122	dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
	123	return -EFAULT;
	124	}
	125
	126	if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
	127	dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
	128	return -EFAULT;
	129	}
	130
	131	hw_data->enable_ints(accel_dev);
	132
	133	if (adf_ae_init(accel_dev)) {
	134	dev_err(&GET_DEV(accel_dev),
	135	"Failed to initialise Acceleration Engine\n");
	136	return -EFAULT;
	137	}
	138	set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
	139
	140	if (adf_ae_fw_load(accel_dev)) {
	141	dev_err(&GET_DEV(accel_dev),
	142	"Failed to load acceleration FW\n");
	143	return -EFAULT;
	144	}
	145	set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
	146
	147	if (hw_data->alloc_irq(accel_dev)) {
	148	dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
	149	return -EFAULT;
	150	}
	151	set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
	152
	153	/*
	154	* Subservice initialisation is divided into two stages: init and start.
	155	* This is to facilitate any ordering dependencies between services
	156	* prior to starting any of the accelerators.
	157	*/
	158	list_for_each(list_itr, &service_table) {
	159	service = list_entry(list_itr, struct service_hndl, list);
	160	if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
	161	dev_err(&GET_DEV(accel_dev),
	162	"Failed to initialise service %s\n",
	163	service->name);
	164	return -EFAULT;
	165	}
	166	set_bit(accel_dev->accel_id, &service->init_status);
	167	}
	168
	169	hw_data->enable_error_correction(accel_dev);
	170	hw_data->enable_vf2pf_comms(accel_dev);
	171
	172	return 0;
	173	}
	174	EXPORT_SYMBOL_GPL(adf_dev_init);
	175
	176	/**
	177	* adf_dev_start() - Start acceleration service for the given accel device
	178	* @accel_dev: Pointer to acceleration device.
	179	*
	180	* Function notifies all the registered services that the acceleration device
	181	* is ready to be used.
	182	* To be used by QAT device specific drivers.
	183	*
	184	* Return: 0 on success, error code otherwise.
	185	*/
	186	int adf_dev_start(struct adf_accel_dev *accel_dev)
	187	{
	188	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	189	struct service_hndl *service;
	190	struct list_head *list_itr;
	191
	192	set_bit(ADF_STATUS_STARTING, &accel_dev->status);
	193
	194	if (adf_ae_start(accel_dev)) {
	195	dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
	196	return -EFAULT;
	197	}
	198	set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
	199
	200	if (hw_data->send_admin_init(accel_dev)) {
	201	dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
	202	return -EFAULT;
	203	}
	204
	205	list_for_each(list_itr, &service_table) {
	206	service = list_entry(list_itr, struct service_hndl, list);
	207	if (service->event_hld(accel_dev, ADF_EVENT_START)) {
	208	dev_err(&GET_DEV(accel_dev),
	209	"Failed to start service %s\n",
	210	service->name);
	211	return -EFAULT;
	212	}
	213	set_bit(accel_dev->accel_id, &service->start_status);
	214	}
	215
	216	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
	217	set_bit(ADF_STATUS_STARTED, &accel_dev->status);
	218
	219	if (!list_empty(&accel_dev->crypto_list) &&
	220	(qat_algs_register() \|\| qat_asym_algs_register())) {
	221	dev_err(&GET_DEV(accel_dev),
	222	"Failed to register crypto algs\n");
	223	set_bit(ADF_STATUS_STARTING, &accel_dev->status);
	224	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
	225	return -EFAULT;
	226	}
	227	return 0;
	228	}
	229	EXPORT_SYMBOL_GPL(adf_dev_start);
	230
	231	/**
	232	* adf_dev_stop() - Stop acceleration service for the given accel device
	233	* @accel_dev: Pointer to acceleration device.
	234	*
	235	* Function notifies all the registered services that the acceleration device
	236	* is shuting down.
	237	* To be used by QAT device specific drivers.
	238	*
	239	* Return: void
	240	*/
	241	void adf_dev_stop(struct adf_accel_dev *accel_dev)
	242	{
	243	struct service_hndl *service;
	244	struct list_head *list_itr;
	245	bool wait = false;
	246	int ret;
	247
	248	if (!adf_dev_started(accel_dev) &&
	249	!test_bit(ADF_STATUS_STARTING, &accel_dev->status))
	250	return;
	251
	252	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
	253	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
	254
	255	if (!list_empty(&accel_dev->crypto_list)) {
	256	qat_algs_unregister();
	257	qat_asym_algs_unregister();
	258	}
	259
	260	list_for_each(list_itr, &service_table) {
	261	service = list_entry(list_itr, struct service_hndl, list);
	262	if (!test_bit(accel_dev->accel_id, &service->start_status))
	263	continue;
	264	ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
	265	if (!ret) {
	266	clear_bit(accel_dev->accel_id, &service->start_status);
	267	} else if (ret == -EAGAIN) {
	268	wait = true;
	269	clear_bit(accel_dev->accel_id, &service->start_status);
	270	}
	271	}
	272
	273	if (wait)
	274	msleep(100);
	275
	276	if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
	277	if (adf_ae_stop(accel_dev))
	278	dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
	279	else
	280	clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
	281	}
	282	}
	283	EXPORT_SYMBOL_GPL(adf_dev_stop);
	284
	285	/**
	286	* adf_dev_shutdown() - shutdown acceleration services and data strucutures
	287	* @accel_dev: Pointer to acceleration device
	288	*
	289	* Cleanup the ring data structures and the admin comms and arbitration
	290	* services.
	291	*/
	292	void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
	293	{
	294	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	295	struct service_hndl *service;
	296	struct list_head *list_itr;
	297
	298	if (!hw_data) {
	299	dev_err(&GET_DEV(accel_dev),
	300	"QAT: Failed to shutdown device - hw_data not set\n");
	301	return;
	302	}
	303
	304	if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
	305	adf_ae_fw_release(accel_dev);
	306	clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
	307	}
	308
	309	if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
	310	if (adf_ae_shutdown(accel_dev))
	311	dev_err(&GET_DEV(accel_dev),
	312	"Failed to shutdown Accel Engine\n");
	313	else
	314	clear_bit(ADF_STATUS_AE_INITIALISED,
	315	&accel_dev->status);
	316	}
	317
	318	list_for_each(list_itr, &service_table) {
	319	service = list_entry(list_itr, struct service_hndl, list);
	320	if (!test_bit(accel_dev->accel_id, &service->init_status))
	321	continue;
	322	if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
	323	dev_err(&GET_DEV(accel_dev),
	324	"Failed to shutdown service %s\n",
	325	service->name);
	326	else
	327	clear_bit(accel_dev->accel_id, &service->init_status);
	328	}
	329
	330	if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
	331	hw_data->free_irq(accel_dev);
	332	clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
	333	}
	334
	335	/* Delete configuration only if not restarting */
	336	if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
	337	adf_cfg_del_all(accel_dev);
	338
	339	if (hw_data->exit_arb)
	340	hw_data->exit_arb(accel_dev);
	341
	342	if (hw_data->exit_admin_comms)
	343	hw_data->exit_admin_comms(accel_dev);
	344
	345	hw_data->disable_iov(accel_dev);
	346	adf_cleanup_etr_data(accel_dev);
	347	adf_dev_restore(accel_dev);
	348	}
	349	EXPORT_SYMBOL_GPL(adf_dev_shutdown);
	350
	351	int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
	352	{
	353	struct service_hndl *service;
	354	struct list_head *list_itr;
	355
	356	list_for_each(list_itr, &service_table) {
	357	service = list_entry(list_itr, struct service_hndl, list);
	358	if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
	359	dev_err(&GET_DEV(accel_dev),
	360	"Failed to restart service %s.\n",
	361	service->name);
	362	}
	363	return 0;
	364	}
	365
	366	int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
	367	{
	368	struct service_hndl *service;
	369	struct list_head *list_itr;
	370
	371	list_for_each(list_itr, &service_table) {
	372	service = list_entry(list_itr, struct service_hndl, list);
	373	if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
	374	dev_err(&GET_DEV(accel_dev),
	375	"Failed to restart service %s.\n",
	376	service->name);
	377	}
	378	return 0;
	379	}