drivers/crypto/qat/qat_c62x/adf_drv.c - linux - Git at Google

 /*
   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/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
 #include <linux/workqueue.h>
 #include <linux/io.h>
 #include <adf_accel_devices.h>
 #include <adf_common_drv.h>
 #include <adf_cfg.h>
 #include "adf_c62x_hw_data.h"

 #define ADF_SYSTEM_DEVICE(device_id) \
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

 static const struct pci_device_id adf_pci_tbl[] = {
 	ADF_SYSTEM_DEVICE(ADF_C62X_PCI_DEVICE_ID),
 	{0,}
 };
 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);

 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
 static void adf_remove(struct pci_dev *dev);

 static struct pci_driver adf_driver = {
 	.id_table = adf_pci_tbl,
 	.name = ADF_C62X_DEVICE_NAME,
 	.probe = adf_probe,
 	.remove = adf_remove,
 	.sriov_configure = adf_sriov_configure,
 };

 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
 {
 	pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
 	pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
 }

 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
 {
 	struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
 	int i;

 	for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
 		struct adf_bar *bar = &accel_pci_dev->pci_bars[i];

 		if (bar->virt_addr)
 			pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
 	}

 	if (accel_dev->hw_device) {
 		switch (accel_pci_dev->pci_dev->device) {
 		case ADF_C62X_PCI_DEVICE_ID:
 			adf_clean_hw_data_c62x(accel_dev->hw_device);
 			break;
 		default:
 			break;
 		}
 		kfree(accel_dev->hw_device);
 		accel_dev->hw_device = NULL;
 	}
 	adf_cfg_dev_remove(accel_dev);
 	debugfs_remove(accel_dev->debugfs_dir);
 	adf_devmgr_rm_dev(accel_dev, NULL);
 }

 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct adf_accel_dev *accel_dev;
 	struct adf_accel_pci *accel_pci_dev;
 	struct adf_hw_device_data *hw_data;
 	char name[ADF_DEVICE_NAME_LENGTH];
 	unsigned int i, bar_nr;
 	int ret, bar_mask;

 	switch (ent->device) {
 	case ADF_C62X_PCI_DEVICE_ID:
 		break;
 	default:
 		dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
 		return -ENODEV;
 	}

 	if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 		/* If the accelerator is connected to a node with no memory
 		 * there is no point in using the accelerator since the remote
 		 * memory transaction will be very slow. */
 		dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 		return -EINVAL;
 	}

 	accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 				 dev_to_node(&pdev->dev));
 	if (!accel_dev)
 		return -ENOMEM;

 	INIT_LIST_HEAD(&accel_dev->crypto_list);
 	accel_pci_dev = &accel_dev->accel_pci_dev;
 	accel_pci_dev->pci_dev = pdev;

 	/* Add accel device to accel table.
 	 * This should be called before adf_cleanup_accel is called */
 	if (adf_devmgr_add_dev(accel_dev, NULL)) {
 		dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 		kfree(accel_dev);
 		return -EFAULT;
 	}

 	accel_dev->owner = THIS_MODULE;
 	/* Allocate and configure device configuration structure */
 	hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 			       dev_to_node(&pdev->dev));
 	if (!hw_data) {
 		ret = -ENOMEM;
 		goto out_err;
 	}

 	accel_dev->hw_device = hw_data;
 	adf_init_hw_data_c62x(accel_dev->hw_device);
 	pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 	pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 			      &hw_data->fuses);

 	/* Get Accelerators and Accelerators Engines masks */
 	hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
 	hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
 	accel_pci_dev->sku = hw_data->get_sku(hw_data);
 	/* If the device has no acceleration engines then ignore it. */
 	if (!hw_data->accel_mask || !hw_data->ae_mask ||
 	    ((~hw_data->ae_mask) & 0x01)) {
 		dev_err(&pdev->dev, "No acceleration units found");
 		ret = -EFAULT;
 		goto out_err;
 	}

 	/* Create dev top level debugfs entry */
 	snprintf(name, sizeof(name), "%s%s_%02x:%02d.%02d",
 		 ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
 		 pdev->bus->number, PCI_SLOT(pdev->devfn),
 		 PCI_FUNC(pdev->devfn));

 	accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 	if (!accel_dev->debugfs_dir) {
 		dev_err(&pdev->dev, "Could not create debugfs dir %s\n", name);
 		ret = -EINVAL;
 		goto out_err;
 	}

 	/* Create device configuration table */
 	ret = adf_cfg_dev_add(accel_dev);
 	if (ret)
 		goto out_err;

 	/* enable PCI device */
 	if (pci_enable_device(pdev)) {
 		ret = -EFAULT;
 		goto out_err;
 	}

 	/* set dma identifier */
 	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 		if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 			dev_err(&pdev->dev, "No usable DMA configuration\n");
 			ret = -EFAULT;
 			goto out_err_disable;
 		} else {
 			pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 		}

 	} else {
 		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 	}

 	if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
 		ret = -EFAULT;
 		goto out_err_disable;
 	}

 	/* Read accelerator capabilities mask */
 	pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
 			      &hw_data->accel_capabilities_mask);

 	/* Find and map all the device's BARS */
 	i = 0;
 	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 	for_each_set_bit(bar_nr, (const unsigned long *)&bar_mask,
 			 ADF_PCI_MAX_BARS * 2) {
 		struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];

 		bar->base_addr = pci_resource_start(pdev, bar_nr);
 		if (!bar->base_addr)
 			break;
 		bar->size = pci_resource_len(pdev, bar_nr);
 		bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 		if (!bar->virt_addr) {
 			dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 			ret = -EFAULT;
 			goto out_err_free_reg;
 		}
 	}
 	pci_set_master(pdev);

 	if (adf_enable_aer(accel_dev, &adf_driver)) {
 		dev_err(&pdev->dev, "Failed to enable aer\n");
 		ret = -EFAULT;
 		goto out_err_free_reg;
 	}

 	if (pci_save_state(pdev)) {
 		dev_err(&pdev->dev, "Failed to save pci state\n");
 		ret = -ENOMEM;
 		goto out_err_free_reg;
 	}

 	ret = qat_crypto_dev_config(accel_dev);
 	if (ret)
 		goto out_err_free_reg;

 	ret = adf_dev_init(accel_dev);
 	if (ret)
 		goto out_err_dev_shutdown;

 	ret = adf_dev_start(accel_dev);
 	if (ret)
 		goto out_err_dev_stop;

 	return ret;

 out_err_dev_stop:
 	adf_dev_stop(accel_dev);
 out_err_dev_shutdown:
 	adf_dev_shutdown(accel_dev);
 out_err_free_reg:
 	pci_release_regions(accel_pci_dev->pci_dev);
 out_err_disable:
 	pci_disable_device(accel_pci_dev->pci_dev);
 out_err:
 	adf_cleanup_accel(accel_dev);
 	kfree(accel_dev);
 	return ret;
 }

 static void adf_remove(struct pci_dev *pdev)
 {
 	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);

 	if (!accel_dev) {
 		pr_err("QAT: Driver removal failed\n");
 		return;
 	}
 	if (adf_dev_stop(accel_dev))
 		dev_err(&GET_DEV(accel_dev), "Failed to stop QAT accel dev\n");

 	adf_dev_shutdown(accel_dev);
 	adf_disable_aer(accel_dev);
 	adf_cleanup_accel(accel_dev);
 	adf_cleanup_pci_dev(accel_dev);
 	kfree(accel_dev);
 }

 static int __init adfdrv_init(void)
 {
 	request_module("intel_qat");

 	if (pci_register_driver(&adf_driver)) {
 		pr_err("QAT: Driver initialization failed\n");
 		return -EFAULT;
 	}
 	return 0;
 }

 static void __exit adfdrv_release(void)
 {
 	pci_unregister_driver(&adf_driver);
 }

 module_init(adfdrv_init);
 module_exit(adfdrv_release);

 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Intel");
 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 MODULE_VERSION(ADF_DRV_VERSION);
	/*
	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/kernel.h>
	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/types.h>
	#include <linux/fs.h>
	#include <linux/slab.h>
	#include <linux/errno.h>
	#include <linux/device.h>
	#include <linux/dma-mapping.h>
	#include <linux/platform_device.h>
	#include <linux/workqueue.h>
	#include <linux/io.h>
	#include <adf_accel_devices.h>
	#include <adf_common_drv.h>
	#include <adf_cfg.h>
	#include "adf_c62x_hw_data.h"

	#define ADF_SYSTEM_DEVICE(device_id) \
	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}

	static const struct pci_device_id adf_pci_tbl[] = {
	ADF_SYSTEM_DEVICE(ADF_C62X_PCI_DEVICE_ID),
	{0,}
	};
	MODULE_DEVICE_TABLE(pci, adf_pci_tbl);

	static int adf_probe(struct pci_dev dev, const struct pci_device_id ent);
	static void adf_remove(struct pci_dev *dev);

	static struct pci_driver adf_driver = {
	.id_table = adf_pci_tbl,
	.name = ADF_C62X_DEVICE_NAME,
	.probe = adf_probe,
	.remove = adf_remove,
	.sriov_configure = adf_sriov_configure,
	};

	static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
	{
	pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
	pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
	}

	static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
	{
	struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
	int i;

	for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
	struct adf_bar *bar = &accel_pci_dev->pci_bars[i];

	if (bar->virt_addr)
	pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
	}

	if (accel_dev->hw_device) {
	switch (accel_pci_dev->pci_dev->device) {
	case ADF_C62X_PCI_DEVICE_ID:
	adf_clean_hw_data_c62x(accel_dev->hw_device);
	break;
	default:
	break;
	}
	kfree(accel_dev->hw_device);
	accel_dev->hw_device = NULL;
	}
	adf_cfg_dev_remove(accel_dev);
	debugfs_remove(accel_dev->debugfs_dir);
	adf_devmgr_rm_dev(accel_dev, NULL);
	}

	static int adf_probe(struct pci_dev pdev, const struct pci_device_id ent)
	{
	struct adf_accel_dev *accel_dev;
	struct adf_accel_pci *accel_pci_dev;
	struct adf_hw_device_data *hw_data;
	char name[ADF_DEVICE_NAME_LENGTH];
	unsigned int i, bar_nr;
	int ret, bar_mask;

	switch (ent->device) {
	case ADF_C62X_PCI_DEVICE_ID:
	break;
	default:
	dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
	return -ENODEV;
	}

	if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
	/* If the accelerator is connected to a node with no memory
	* there is no point in using the accelerator since the remote
	* memory transaction will be very slow. */
	dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
	return -EINVAL;
	}

	accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
	dev_to_node(&pdev->dev));
	if (!accel_dev)
	return -ENOMEM;

	INIT_LIST_HEAD(&accel_dev->crypto_list);
	accel_pci_dev = &accel_dev->accel_pci_dev;
	accel_pci_dev->pci_dev = pdev;

	/* Add accel device to accel table.
	* This should be called before adf_cleanup_accel is called */
	if (adf_devmgr_add_dev(accel_dev, NULL)) {
	dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
	kfree(accel_dev);
	return -EFAULT;
	}

	accel_dev->owner = THIS_MODULE;
	/* Allocate and configure device configuration structure */
	hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
	dev_to_node(&pdev->dev));
	if (!hw_data) {
	ret = -ENOMEM;
	goto out_err;
	}

	accel_dev->hw_device = hw_data;
	adf_init_hw_data_c62x(accel_dev->hw_device);
	pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
	pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
	&hw_data->fuses);

	/* Get Accelerators and Accelerators Engines masks */
	hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
	hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
	accel_pci_dev->sku = hw_data->get_sku(hw_data);
	/* If the device has no acceleration engines then ignore it. */
	if (!hw_data->accel_mask \|\| !hw_data->ae_mask \|\|
	((~hw_data->ae_mask) & 0x01)) {
	dev_err(&pdev->dev, "No acceleration units found");
	ret = -EFAULT;
	goto out_err;
	}

	/* Create dev top level debugfs entry */
	snprintf(name, sizeof(name), "%s%s_%02x:%02d.%02d",
	ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
	pdev->bus->number, PCI_SLOT(pdev->devfn),
	PCI_FUNC(pdev->devfn));

	accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
	if (!accel_dev->debugfs_dir) {
	dev_err(&pdev->dev, "Could not create debugfs dir %s\n", name);
	ret = -EINVAL;
	goto out_err;
	}

	/* Create device configuration table */
	ret = adf_cfg_dev_add(accel_dev);
	if (ret)
	goto out_err;

	/* enable PCI device */
	if (pci_enable_device(pdev)) {
	ret = -EFAULT;
	goto out_err;
	}

	/* set dma identifier */
	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
	if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
	dev_err(&pdev->dev, "No usable DMA configuration\n");
	ret = -EFAULT;
	goto out_err_disable;
	} else {
	pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	}

	} else {
	pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
	}

	if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
	ret = -EFAULT;
	goto out_err_disable;
	}

	/* Read accelerator capabilities mask */
	pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
	&hw_data->accel_capabilities_mask);

	/* Find and map all the device's BARS */
	i = 0;
	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
	for_each_set_bit(bar_nr, (const unsigned long *)&bar_mask,
	ADF_PCI_MAX_BARS * 2) {
	struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];

	bar->base_addr = pci_resource_start(pdev, bar_nr);
	if (!bar->base_addr)
	break;
	bar->size = pci_resource_len(pdev, bar_nr);
	bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
	if (!bar->virt_addr) {
	dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
	ret = -EFAULT;
	goto out_err_free_reg;
	}
	}
	pci_set_master(pdev);

	if (adf_enable_aer(accel_dev, &adf_driver)) {
	dev_err(&pdev->dev, "Failed to enable aer\n");
	ret = -EFAULT;
	goto out_err_free_reg;
	}

	if (pci_save_state(pdev)) {
	dev_err(&pdev->dev, "Failed to save pci state\n");
	ret = -ENOMEM;
	goto out_err_free_reg;
	}

	ret = qat_crypto_dev_config(accel_dev);
	if (ret)
	goto out_err_free_reg;

	ret = adf_dev_init(accel_dev);
	if (ret)
	goto out_err_dev_shutdown;

	ret = adf_dev_start(accel_dev);
	if (ret)
	goto out_err_dev_stop;

	return ret;

	out_err_dev_stop:
	adf_dev_stop(accel_dev);
	out_err_dev_shutdown:
	adf_dev_shutdown(accel_dev);
	out_err_free_reg:
	pci_release_regions(accel_pci_dev->pci_dev);
	out_err_disable:
	pci_disable_device(accel_pci_dev->pci_dev);
	out_err:
	adf_cleanup_accel(accel_dev);
	kfree(accel_dev);
	return ret;
	}

	static void adf_remove(struct pci_dev *pdev)
	{
	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);

	if (!accel_dev) {
	pr_err("QAT: Driver removal failed\n");
	return;
	}
	if (adf_dev_stop(accel_dev))
	dev_err(&GET_DEV(accel_dev), "Failed to stop QAT accel dev\n");

	adf_dev_shutdown(accel_dev);
	adf_disable_aer(accel_dev);
	adf_cleanup_accel(accel_dev);
	adf_cleanup_pci_dev(accel_dev);
	kfree(accel_dev);
	}

	static int __init adfdrv_init(void)
	{
	request_module("intel_qat");

	if (pci_register_driver(&adf_driver)) {
	pr_err("QAT: Driver initialization failed\n");
	return -EFAULT;
	}
	return 0;
	}

	static void __exit adfdrv_release(void)
	{
	pci_unregister_driver(&adf_driver);
	}

	module_init(adfdrv_init);
	module_exit(adfdrv_release);

	MODULE_LICENSE("Dual BSD/GPL");
	MODULE_AUTHOR("Intel");
	MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
	MODULE_VERSION(ADF_DRV_VERSION);