364 lines
10 KiB
C
364 lines
10 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/slab.h>
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#include <linux/list.h>
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#include <linux/seq_file.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 DEFINE_MUTEX(qat_cfg_read_lock);
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static void *qat_dev_cfg_start(struct seq_file *sfile, loff_t *pos)
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{
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struct adf_cfg_device_data *dev_cfg = sfile->private;
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mutex_lock(&qat_cfg_read_lock);
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return seq_list_start(&dev_cfg->sec_list, *pos);
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}
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static int qat_dev_cfg_show(struct seq_file *sfile, void *v)
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{
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struct list_head *list;
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struct adf_cfg_section *sec =
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list_entry(v, struct adf_cfg_section, list);
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seq_printf(sfile, "[%s]\n", sec->name);
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list_for_each(list, &sec->param_head) {
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struct adf_cfg_key_val *ptr =
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list_entry(list, struct adf_cfg_key_val, list);
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seq_printf(sfile, "%s = %s\n", ptr->key, ptr->val);
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}
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return 0;
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}
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static void *qat_dev_cfg_next(struct seq_file *sfile, void *v, loff_t *pos)
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{
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struct adf_cfg_device_data *dev_cfg = sfile->private;
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return seq_list_next(v, &dev_cfg->sec_list, pos);
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}
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static void qat_dev_cfg_stop(struct seq_file *sfile, void *v)
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{
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mutex_unlock(&qat_cfg_read_lock);
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}
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static const struct seq_operations qat_dev_cfg_sops = {
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.start = qat_dev_cfg_start,
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.next = qat_dev_cfg_next,
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.stop = qat_dev_cfg_stop,
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.show = qat_dev_cfg_show
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};
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static int qat_dev_cfg_open(struct inode *inode, struct file *file)
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{
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int ret = seq_open(file, &qat_dev_cfg_sops);
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if (!ret) {
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struct seq_file *seq_f = file->private_data;
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seq_f->private = inode->i_private;
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}
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return ret;
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}
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static const struct file_operations qat_dev_cfg_fops = {
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.open = qat_dev_cfg_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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/**
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* adf_cfg_dev_add() - Create an acceleration device configuration table.
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* @accel_dev: Pointer to acceleration device.
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*
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* Function creates a configuration table for the given acceleration device.
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* The table stores device specific config values.
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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 othewise.
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*/
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int adf_cfg_dev_add(struct adf_accel_dev *accel_dev)
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{
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struct adf_cfg_device_data *dev_cfg_data;
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dev_cfg_data = kzalloc(sizeof(*dev_cfg_data), GFP_KERNEL);
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if (!dev_cfg_data)
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return -ENOMEM;
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INIT_LIST_HEAD(&dev_cfg_data->sec_list);
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init_rwsem(&dev_cfg_data->lock);
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accel_dev->cfg = dev_cfg_data;
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/* accel_dev->debugfs_dir should always be non-NULL here */
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dev_cfg_data->debug = debugfs_create_file("dev_cfg", S_IRUSR,
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accel_dev->debugfs_dir,
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dev_cfg_data,
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&qat_dev_cfg_fops);
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if (!dev_cfg_data->debug) {
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pr_err("QAT: Failed to create qat cfg debugfs entry.\n");
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kfree(dev_cfg_data);
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accel_dev->cfg = NULL;
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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_cfg_dev_add);
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static void adf_cfg_section_del_all(struct list_head *head);
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void adf_cfg_del_all(struct adf_accel_dev *accel_dev)
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{
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struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
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down_write(&dev_cfg_data->lock);
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adf_cfg_section_del_all(&dev_cfg_data->sec_list);
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up_write(&dev_cfg_data->lock);
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clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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}
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/**
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* adf_cfg_dev_remove() - Clears acceleration device configuration table.
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* @accel_dev: Pointer to acceleration device.
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*
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* Function removes configuration table from the given acceleration device
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* and frees all allocated memory.
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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_cfg_dev_remove(struct adf_accel_dev *accel_dev)
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{
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struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
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down_write(&dev_cfg_data->lock);
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adf_cfg_section_del_all(&dev_cfg_data->sec_list);
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up_write(&dev_cfg_data->lock);
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debugfs_remove(dev_cfg_data->debug);
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kfree(dev_cfg_data);
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accel_dev->cfg = NULL;
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}
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EXPORT_SYMBOL_GPL(adf_cfg_dev_remove);
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static void adf_cfg_keyval_add(struct adf_cfg_key_val *new,
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struct adf_cfg_section *sec)
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{
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list_add_tail(&new->list, &sec->param_head);
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}
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static void adf_cfg_keyval_del_all(struct list_head *head)
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{
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struct list_head *list_ptr, *tmp;
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list_for_each_prev_safe(list_ptr, tmp, head) {
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struct adf_cfg_key_val *ptr =
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list_entry(list_ptr, struct adf_cfg_key_val, list);
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list_del(list_ptr);
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kfree(ptr);
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}
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}
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static void adf_cfg_section_del_all(struct list_head *head)
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{
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struct adf_cfg_section *ptr;
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struct list_head *list, *tmp;
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list_for_each_prev_safe(list, tmp, head) {
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ptr = list_entry(list, struct adf_cfg_section, list);
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adf_cfg_keyval_del_all(&ptr->param_head);
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list_del(list);
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kfree(ptr);
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}
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}
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static struct adf_cfg_key_val *adf_cfg_key_value_find(struct adf_cfg_section *s,
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const char *key)
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{
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struct list_head *list;
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list_for_each(list, &s->param_head) {
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struct adf_cfg_key_val *ptr =
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list_entry(list, struct adf_cfg_key_val, list);
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if (!strcmp(ptr->key, key))
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return ptr;
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}
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return NULL;
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}
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static struct adf_cfg_section *adf_cfg_sec_find(struct adf_accel_dev *accel_dev,
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const char *sec_name)
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{
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struct adf_cfg_device_data *cfg = accel_dev->cfg;
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struct list_head *list;
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list_for_each(list, &cfg->sec_list) {
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struct adf_cfg_section *ptr =
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list_entry(list, struct adf_cfg_section, list);
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if (!strcmp(ptr->name, sec_name))
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return ptr;
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}
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return NULL;
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}
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static int adf_cfg_key_val_get(struct adf_accel_dev *accel_dev,
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const char *sec_name,
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const char *key_name,
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char *val)
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{
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struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, sec_name);
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struct adf_cfg_key_val *keyval = NULL;
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if (sec)
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keyval = adf_cfg_key_value_find(sec, key_name);
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if (keyval) {
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memcpy(val, keyval->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES);
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return 0;
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}
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return -1;
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}
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/**
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* adf_cfg_add_key_value_param() - Add key-value config entry to config table.
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* @accel_dev: Pointer to acceleration device.
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* @section_name: Name of the section where the param will be added
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* @key: The key string
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* @val: Value pain for the given @key
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* @type: Type - string, int or address
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*
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* Function adds configuration key - value entry in the appropriate section
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* in the given acceleration device
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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 othewise.
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*/
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int adf_cfg_add_key_value_param(struct adf_accel_dev *accel_dev,
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const char *section_name,
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const char *key, const void *val,
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enum adf_cfg_val_type type)
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{
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struct adf_cfg_device_data *cfg = accel_dev->cfg;
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struct adf_cfg_key_val *key_val;
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struct adf_cfg_section *section = adf_cfg_sec_find(accel_dev,
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section_name);
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if (!section)
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return -EFAULT;
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key_val = kzalloc(sizeof(*key_val), GFP_KERNEL);
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if (!key_val)
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return -ENOMEM;
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INIT_LIST_HEAD(&key_val->list);
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strlcpy(key_val->key, key, sizeof(key_val->key));
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if (type == ADF_DEC) {
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snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
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"%ld", (*((long *)val)));
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} else if (type == ADF_STR) {
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strlcpy(key_val->val, (char *)val, sizeof(key_val->val));
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} else if (type == ADF_HEX) {
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snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
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"0x%lx", (unsigned long)val);
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} else {
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pr_err("QAT: Unknown type given.\n");
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kfree(key_val);
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return -1;
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}
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key_val->type = type;
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down_write(&cfg->lock);
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adf_cfg_keyval_add(key_val, section);
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up_write(&cfg->lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_cfg_add_key_value_param);
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/**
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* adf_cfg_section_add() - Add config section entry to config table.
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* @accel_dev: Pointer to acceleration device.
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* @name: Name of the section
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*
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* Function adds configuration section where key - value entries
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* will be stored.
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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 othewise.
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*/
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int adf_cfg_section_add(struct adf_accel_dev *accel_dev, const char *name)
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{
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struct adf_cfg_device_data *cfg = accel_dev->cfg;
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struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, name);
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if (sec)
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return 0;
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sec = kzalloc(sizeof(*sec), GFP_KERNEL);
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if (!sec)
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return -ENOMEM;
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strlcpy(sec->name, name, sizeof(sec->name));
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INIT_LIST_HEAD(&sec->param_head);
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down_write(&cfg->lock);
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list_add_tail(&sec->list, &cfg->sec_list);
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up_write(&cfg->lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_cfg_section_add);
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int adf_cfg_get_param_value(struct adf_accel_dev *accel_dev,
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const char *section, const char *name,
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char *value)
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{
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struct adf_cfg_device_data *cfg = accel_dev->cfg;
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int ret;
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down_read(&cfg->lock);
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ret = adf_cfg_key_val_get(accel_dev, section, name, value);
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up_read(&cfg->lock);
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return ret;
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}
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