385 lines
11 KiB
C
385 lines
11 KiB
C
/*
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This file is provided under a dual BSD/GPLv2 license. When using or
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redistributing this file, you may do so under either license.
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GPL LICENSE SUMMARY
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Copyright(c) 2014 Intel Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Contact Information:
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qat-linux@intel.com
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BSD LICENSE
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Copyright(c) 2014 Intel Corporation.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include "adf_accel_devices.h"
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#include "adf_cfg.h"
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#include "adf_common_drv.h"
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static LIST_HEAD(service_table);
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static DEFINE_MUTEX(service_lock);
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static void adf_service_add(struct service_hndl *service)
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{
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mutex_lock(&service_lock);
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list_add(&service->list, &service_table);
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mutex_unlock(&service_lock);
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}
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int adf_service_register(struct service_hndl *service)
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{
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memset(service->init_status, 0, sizeof(service->init_status));
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memset(service->start_status, 0, sizeof(service->start_status));
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adf_service_add(service);
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return 0;
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}
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static void adf_service_remove(struct service_hndl *service)
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{
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mutex_lock(&service_lock);
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list_del(&service->list);
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mutex_unlock(&service_lock);
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}
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int adf_service_unregister(struct service_hndl *service)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(service->init_status); i++) {
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if (service->init_status[i] || service->start_status[i]) {
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pr_err("QAT: Could not remove active service\n");
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return -EFAULT;
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}
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}
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adf_service_remove(service);
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return 0;
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}
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/**
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* adf_dev_init() - Init data structures and services for the given accel device
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* @accel_dev: Pointer to acceleration device.
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*
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* Initialize the ring data structures and the admin comms and arbitration
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* services.
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*
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* Return: 0 on success, error code otherwise.
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*/
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int adf_dev_init(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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if (!hw_data) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to init device - hw_data not set\n");
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return -EFAULT;
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}
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if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
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dev_err(&GET_DEV(accel_dev), "Device not configured\n");
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return -EFAULT;
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}
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if (adf_init_etr_data(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
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return -EFAULT;
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}
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if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
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return -EFAULT;
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}
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if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
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return -EFAULT;
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}
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hw_data->enable_ints(accel_dev);
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if (adf_ae_init(accel_dev)) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to initialise Acceleration Engine\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
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if (adf_ae_fw_load(accel_dev)) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to load acceleration FW\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
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if (hw_data->alloc_irq(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
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/*
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* Subservice initialisation is divided into two stages: init and start.
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* This is to facilitate any ordering dependencies between services
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* prior to starting any of the accelerators.
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*/
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to initialise service %s\n",
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service->name);
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return -EFAULT;
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}
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set_bit(accel_dev->accel_id, service->init_status);
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}
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hw_data->enable_error_correction(accel_dev);
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hw_data->enable_vf2pf_comms(accel_dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_dev_init);
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/**
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* adf_dev_start() - Start acceleration service for the given accel device
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* @accel_dev: Pointer to acceleration device.
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*
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* Function notifies all the registered services that the acceleration device
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* is ready to be used.
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* To be used by QAT device specific drivers.
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*
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* Return: 0 on success, error code otherwise.
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*/
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int adf_dev_start(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct service_hndl *service;
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struct list_head *list_itr;
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set_bit(ADF_STATUS_STARTING, &accel_dev->status);
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if (adf_ae_start(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
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if (hw_data->send_admin_init(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
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return -EFAULT;
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}
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (service->event_hld(accel_dev, ADF_EVENT_START)) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to start service %s\n",
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service->name);
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return -EFAULT;
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}
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set_bit(accel_dev->accel_id, service->start_status);
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}
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clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
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set_bit(ADF_STATUS_STARTED, &accel_dev->status);
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if (!list_empty(&accel_dev->crypto_list) &&
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(qat_algs_register() || qat_asym_algs_register())) {
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dev_err(&GET_DEV(accel_dev),
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"Failed to register crypto algs\n");
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set_bit(ADF_STATUS_STARTING, &accel_dev->status);
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clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
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return -EFAULT;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_dev_start);
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/**
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* adf_dev_stop() - Stop acceleration service for the given accel device
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* @accel_dev: Pointer to acceleration device.
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*
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* Function notifies all the registered services that the acceleration device
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* is shuting down.
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* To be used by QAT device specific drivers.
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*
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* Return: void
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*/
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void adf_dev_stop(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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bool wait = false;
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int ret;
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if (!adf_dev_started(accel_dev) &&
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!test_bit(ADF_STATUS_STARTING, &accel_dev->status))
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return;
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clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
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clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
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if (!list_empty(&accel_dev->crypto_list)) {
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qat_algs_unregister();
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qat_asym_algs_unregister();
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}
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (!test_bit(accel_dev->accel_id, service->start_status))
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continue;
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ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
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if (!ret) {
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clear_bit(accel_dev->accel_id, service->start_status);
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} else if (ret == -EAGAIN) {
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wait = true;
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clear_bit(accel_dev->accel_id, service->start_status);
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}
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}
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if (wait)
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msleep(100);
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if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
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if (adf_ae_stop(accel_dev))
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dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
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else
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clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
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}
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}
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EXPORT_SYMBOL_GPL(adf_dev_stop);
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/**
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* adf_dev_shutdown() - shutdown acceleration services and data strucutures
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* @accel_dev: Pointer to acceleration device
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*
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* Cleanup the ring data structures and the admin comms and arbitration
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* services.
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*/
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void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct service_hndl *service;
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struct list_head *list_itr;
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if (!hw_data) {
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dev_err(&GET_DEV(accel_dev),
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"QAT: Failed to shutdown device - hw_data not set\n");
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return;
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}
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if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
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adf_ae_fw_release(accel_dev);
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clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
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}
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if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
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if (adf_ae_shutdown(accel_dev))
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dev_err(&GET_DEV(accel_dev),
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"Failed to shutdown Accel Engine\n");
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else
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clear_bit(ADF_STATUS_AE_INITIALISED,
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&accel_dev->status);
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}
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (!test_bit(accel_dev->accel_id, service->init_status))
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continue;
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if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
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dev_err(&GET_DEV(accel_dev),
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"Failed to shutdown service %s\n",
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service->name);
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else
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clear_bit(accel_dev->accel_id, service->init_status);
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}
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hw_data->disable_iov(accel_dev);
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if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
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hw_data->free_irq(accel_dev);
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clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
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}
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/* Delete configuration only if not restarting */
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if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
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adf_cfg_del_all(accel_dev);
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if (hw_data->exit_arb)
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hw_data->exit_arb(accel_dev);
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if (hw_data->exit_admin_comms)
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hw_data->exit_admin_comms(accel_dev);
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adf_cleanup_etr_data(accel_dev);
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adf_dev_restore(accel_dev);
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}
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EXPORT_SYMBOL_GPL(adf_dev_shutdown);
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int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
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dev_err(&GET_DEV(accel_dev),
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"Failed to restart service %s.\n",
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service->name);
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}
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return 0;
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}
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int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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list_for_each(list_itr, &service_table) {
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service = list_entry(list_itr, struct service_hndl, list);
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if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
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dev_err(&GET_DEV(accel_dev),
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"Failed to restart service %s.\n",
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service->name);
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}
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return 0;
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}
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