492 lines
13 KiB
C
492 lines
13 KiB
C
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/*
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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/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/bitops.h>
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#include <linux/pci.h>
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#include <linux/cdev.h>
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#include <linux/uaccess.h>
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#include <linux/crypto.h>
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#include "adf_accel_devices.h"
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#include "adf_common_drv.h"
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#include "adf_cfg.h"
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#include "adf_cfg_common.h"
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#include "adf_cfg_user.h"
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#define DEVICE_NAME "qat_adf_ctl"
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static DEFINE_MUTEX(adf_ctl_lock);
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static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
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static const struct file_operations adf_ctl_ops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = adf_ctl_ioctl,
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.compat_ioctl = adf_ctl_ioctl,
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};
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struct adf_ctl_drv_info {
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unsigned int major;
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struct cdev drv_cdev;
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struct class *drv_class;
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};
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static struct adf_ctl_drv_info adt_ctl_drv;
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static void adf_chr_drv_destroy(void)
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{
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device_destroy(adt_ctl_drv.drv_class, MKDEV(adt_ctl_drv.major, 0));
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cdev_del(&adt_ctl_drv.drv_cdev);
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class_destroy(adt_ctl_drv.drv_class);
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unregister_chrdev_region(MKDEV(adt_ctl_drv.major, 0), 1);
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}
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static int adf_chr_drv_create(void)
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{
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dev_t dev_id;
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struct device *drv_device;
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if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
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pr_err("QAT: unable to allocate chrdev region\n");
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return -EFAULT;
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}
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adt_ctl_drv.drv_class = class_create(THIS_MODULE, DEVICE_NAME);
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if (IS_ERR(adt_ctl_drv.drv_class)) {
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pr_err("QAT: class_create failed for adf_ctl\n");
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goto err_chrdev_unreg;
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}
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adt_ctl_drv.major = MAJOR(dev_id);
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cdev_init(&adt_ctl_drv.drv_cdev, &adf_ctl_ops);
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if (cdev_add(&adt_ctl_drv.drv_cdev, dev_id, 1)) {
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pr_err("QAT: cdev add failed\n");
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goto err_class_destr;
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}
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drv_device = device_create(adt_ctl_drv.drv_class, NULL,
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MKDEV(adt_ctl_drv.major, 0),
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NULL, DEVICE_NAME);
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if (IS_ERR(drv_device)) {
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pr_err("QAT: failed to create device\n");
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goto err_cdev_del;
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}
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return 0;
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err_cdev_del:
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cdev_del(&adt_ctl_drv.drv_cdev);
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err_class_destr:
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class_destroy(adt_ctl_drv.drv_class);
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err_chrdev_unreg:
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unregister_chrdev_region(dev_id, 1);
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return -EFAULT;
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}
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static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data,
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unsigned long arg)
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{
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struct adf_user_cfg_ctl_data *cfg_data;
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cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL);
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if (!cfg_data)
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return -ENOMEM;
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/* Initialize device id to NO DEVICE as 0 is a valid device id */
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cfg_data->device_id = ADF_CFG_NO_DEVICE;
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if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) {
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pr_err("QAT: failed to copy from user cfg_data.\n");
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kfree(cfg_data);
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return -EIO;
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}
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*ctl_data = cfg_data;
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return 0;
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}
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static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
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const char *section,
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const struct adf_user_cfg_key_val *key_val)
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{
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if (key_val->type == ADF_HEX) {
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long *ptr = (long *)key_val->val;
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long val = *ptr;
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if (adf_cfg_add_key_value_param(accel_dev, section,
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key_val->key, (void *)val,
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key_val->type)) {
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pr_err("QAT: failed to add keyvalue.\n");
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return -EFAULT;
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}
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} else {
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if (adf_cfg_add_key_value_param(accel_dev, section,
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key_val->key, key_val->val,
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key_val->type)) {
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pr_err("QAT: failed to add keyvalue.\n");
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return -EFAULT;
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}
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}
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return 0;
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}
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static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
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struct adf_user_cfg_ctl_data *ctl_data)
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{
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struct adf_user_cfg_key_val key_val;
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struct adf_user_cfg_key_val *params_head;
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struct adf_user_cfg_section section, *section_head;
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section_head = ctl_data->config_section;
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while (section_head) {
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if (copy_from_user(§ion, (void __user *)section_head,
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sizeof(*section_head))) {
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pr_err("QAT: failed to copy section info\n");
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goto out_err;
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}
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if (adf_cfg_section_add(accel_dev, section.name)) {
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pr_err("QAT: failed to add section.\n");
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goto out_err;
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}
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params_head = section_head->params;
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while (params_head) {
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if (copy_from_user(&key_val, (void __user *)params_head,
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sizeof(key_val))) {
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pr_err("QAT: Failed to copy keyvalue.\n");
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goto out_err;
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}
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if (adf_add_key_value_data(accel_dev, section.name,
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&key_val)) {
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goto out_err;
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}
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params_head = key_val.next;
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}
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section_head = section.next;
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}
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return 0;
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out_err:
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adf_cfg_del_all(accel_dev);
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return -EFAULT;
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}
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static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
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unsigned long arg)
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{
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int ret;
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struct adf_user_cfg_ctl_data *ctl_data;
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struct adf_accel_dev *accel_dev;
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ret = adf_ctl_alloc_resources(&ctl_data, arg);
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if (ret)
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return ret;
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accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
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if (!accel_dev) {
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ret = -EFAULT;
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goto out;
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}
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if (adf_dev_started(accel_dev)) {
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ret = -EFAULT;
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goto out;
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}
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if (adf_copy_key_value_data(accel_dev, ctl_data)) {
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ret = -EFAULT;
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goto out;
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}
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set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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out:
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kfree(ctl_data);
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return ret;
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}
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static int adf_ctl_is_device_in_use(int id)
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{
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struct list_head *itr, *head = adf_devmgr_get_head();
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list_for_each(itr, head) {
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struct adf_accel_dev *dev =
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list_entry(itr, struct adf_accel_dev, list);
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if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
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if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
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pr_info("QAT: device qat_dev%d is busy\n",
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dev->accel_id);
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return -EBUSY;
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}
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}
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}
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return 0;
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}
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static int adf_ctl_stop_devices(uint32_t id)
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{
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struct list_head *itr, *head = adf_devmgr_get_head();
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int ret = 0;
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list_for_each(itr, head) {
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struct adf_accel_dev *accel_dev =
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list_entry(itr, struct adf_accel_dev, list);
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if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
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if (!adf_dev_started(accel_dev))
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continue;
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if (adf_dev_stop(accel_dev)) {
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pr_err("QAT: Failed to stop qat_dev%d\n", id);
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ret = -EFAULT;
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}
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}
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}
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return ret;
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}
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static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
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unsigned long arg)
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{
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int ret;
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struct adf_user_cfg_ctl_data *ctl_data;
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ret = adf_ctl_alloc_resources(&ctl_data, arg);
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if (ret)
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return ret;
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if (adf_devmgr_verify_id(ctl_data->device_id)) {
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pr_err("QAT: Device %d not found\n", ctl_data->device_id);
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ret = -ENODEV;
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goto out;
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}
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ret = adf_ctl_is_device_in_use(ctl_data->device_id);
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if (ret)
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goto out;
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if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
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pr_info("QAT: Stopping all acceleration devices.\n");
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else
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pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
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ctl_data->device_id);
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ret = adf_ctl_stop_devices(ctl_data->device_id);
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if (ret)
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pr_err("QAT: failed to stop device.\n");
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out:
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kfree(ctl_data);
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return ret;
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}
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static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
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unsigned long arg)
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{
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int ret;
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struct adf_user_cfg_ctl_data *ctl_data;
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struct adf_accel_dev *accel_dev;
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ret = adf_ctl_alloc_resources(&ctl_data, arg);
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if (ret)
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return ret;
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accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
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if (!accel_dev) {
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pr_err("QAT: Device %d not found\n", ctl_data->device_id);
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ret = -ENODEV;
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goto out;
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}
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if (!adf_dev_started(accel_dev)) {
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pr_info("QAT: Starting acceleration device qat_dev%d.\n",
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ctl_data->device_id);
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ret = adf_dev_start(accel_dev);
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} else {
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pr_info("QAT: Acceleration device qat_dev%d already started.\n",
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ctl_data->device_id);
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}
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if (ret) {
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pr_err("QAT: Failed to start qat_dev%d\n", ctl_data->device_id);
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adf_dev_stop(accel_dev);
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}
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out:
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kfree(ctl_data);
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return ret;
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}
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static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
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unsigned long arg)
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{
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uint32_t num_devices = 0;
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adf_devmgr_get_num_dev(&num_devices);
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|
|
if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
|
||
|
|
unsigned long arg)
|
||
|
|
{
|
||
|
|
struct adf_hw_device_data *hw_data;
|
||
|
|
struct adf_dev_status_info dev_info;
|
||
|
|
struct adf_accel_dev *accel_dev;
|
||
|
|
|
||
|
|
if (copy_from_user(&dev_info, (void __user *)arg,
|
||
|
|
sizeof(struct adf_dev_status_info))) {
|
||
|
|
pr_err("QAT: failed to copy from user.\n");
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
|
||
|
|
if (!accel_dev) {
|
||
|
|
pr_err("QAT: Device %d not found\n", dev_info.accel_id);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
hw_data = accel_dev->hw_device;
|
||
|
|
dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
|
||
|
|
dev_info.num_ae = hw_data->get_num_aes(hw_data);
|
||
|
|
dev_info.num_accel = hw_data->get_num_accels(hw_data);
|
||
|
|
dev_info.num_logical_accel = hw_data->num_logical_accel;
|
||
|
|
dev_info.banks_per_accel = hw_data->num_banks
|
||
|
|
/ hw_data->num_logical_accel;
|
||
|
|
strlcpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
|
||
|
|
dev_info.instance_id = hw_data->instance_id;
|
||
|
|
dev_info.type = hw_data->dev_class->type;
|
||
|
|
dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
|
||
|
|
dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
|
||
|
|
dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
|
||
|
|
|
||
|
|
if (copy_to_user((void __user *)arg, &dev_info,
|
||
|
|
sizeof(struct adf_dev_status_info))) {
|
||
|
|
pr_err("QAT: failed to copy status.\n");
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (mutex_lock_interruptible(&adf_ctl_lock))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
switch (cmd) {
|
||
|
|
case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
|
||
|
|
ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case IOCTL_STOP_ACCEL_DEV:
|
||
|
|
ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case IOCTL_START_ACCEL_DEV:
|
||
|
|
ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case IOCTL_GET_NUM_DEVICES:
|
||
|
|
ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case IOCTL_STATUS_ACCEL_DEV:
|
||
|
|
ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
pr_err("QAT: Invalid ioctl\n");
|
||
|
|
ret = -EFAULT;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
mutex_unlock(&adf_ctl_lock);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init adf_register_ctl_device_driver(void)
|
||
|
|
{
|
||
|
|
mutex_init(&adf_ctl_lock);
|
||
|
|
|
||
|
|
if (qat_algs_init())
|
||
|
|
goto err_algs_init;
|
||
|
|
|
||
|
|
if (adf_chr_drv_create())
|
||
|
|
goto err_chr_dev;
|
||
|
|
|
||
|
|
if (adf_init_aer())
|
||
|
|
goto err_aer;
|
||
|
|
|
||
|
|
if (qat_crypto_register())
|
||
|
|
goto err_crypto_register;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_crypto_register:
|
||
|
|
adf_exit_aer();
|
||
|
|
err_aer:
|
||
|
|
adf_chr_drv_destroy();
|
||
|
|
err_chr_dev:
|
||
|
|
qat_algs_exit();
|
||
|
|
err_algs_init:
|
||
|
|
mutex_destroy(&adf_ctl_lock);
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit adf_unregister_ctl_device_driver(void)
|
||
|
|
{
|
||
|
|
adf_chr_drv_destroy();
|
||
|
|
adf_exit_aer();
|
||
|
|
qat_crypto_unregister();
|
||
|
|
qat_algs_exit();
|
||
|
|
mutex_destroy(&adf_ctl_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(adf_register_ctl_device_driver);
|
||
|
|
module_exit(adf_unregister_ctl_device_driver);
|
||
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
||
|
|
MODULE_AUTHOR("Intel");
|
||
|
|
MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
|
||
|
|
MODULE_ALIAS_CRYPTO("intel_qat");
|