--- /dev/null
+/*
+ This file is provided under a dual BSD/GPLv2 license. When using or
+ redistributing this file, you may do so under either license.
+
+ GPL LICENSE SUMMARY
+ Copyright(c) 2014 Intel Corporation.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ Contact Information:
+ qat-linux@intel.com
+
+ BSD LICENSE
+ Copyright(c) 2014 Intel Corporation.
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name of Intel Corporation nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include "adf_accel_devices.h"
+#include "adf_cfg.h"
+#include "adf_common_drv.h"
+
+static DEFINE_MUTEX(qat_cfg_read_lock);
+
+static void *qat_dev_cfg_start(struct seq_file *sfile, loff_t *pos)
+{
+ struct adf_cfg_device_data *dev_cfg = sfile->private;
+
+ mutex_lock(&qat_cfg_read_lock);
+ return seq_list_start(&dev_cfg->sec_list, *pos);
+}
+
+static int qat_dev_cfg_show(struct seq_file *sfile, void *v)
+{
+ struct list_head *list;
+ struct adf_cfg_section *sec =
+ list_entry(v, struct adf_cfg_section, list);
+
+ seq_printf(sfile, "[%s]\n", sec->name);
+ list_for_each(list, &sec->param_head) {
+ struct adf_cfg_key_val *ptr =
+ list_entry(list, struct adf_cfg_key_val, list);
+ seq_printf(sfile, "%s = %s\n", ptr->key, ptr->val);
+ }
+ return 0;
+}
+
+static void *qat_dev_cfg_next(struct seq_file *sfile, void *v, loff_t *pos)
+{
+ struct adf_cfg_device_data *dev_cfg = sfile->private;
+
+ return seq_list_next(v, &dev_cfg->sec_list, pos);
+}
+
+static void qat_dev_cfg_stop(struct seq_file *sfile, void *v)
+{
+ mutex_unlock(&qat_cfg_read_lock);
+}
+
+static const struct seq_operations qat_dev_cfg_sops = {
+ .start = qat_dev_cfg_start,
+ .next = qat_dev_cfg_next,
+ .stop = qat_dev_cfg_stop,
+ .show = qat_dev_cfg_show
+};
+
+static int qat_dev_cfg_open(struct inode *inode, struct file *file)
+{
+ int ret = seq_open(file, &qat_dev_cfg_sops);
+
+ if (!ret) {
+ struct seq_file *seq_f = file->private_data;
+
+ seq_f->private = inode->i_private;
+ }
+ return ret;
+}
+
+static const struct file_operations qat_dev_cfg_fops = {
+ .open = qat_dev_cfg_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+/**
+ * adf_cfg_dev_add() - Create an acceleration device configuration table.
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * Function creates a configuration table for the given acceleration device.
+ * The table stores device specific config values.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 0 on success, error code othewise.
+ */
+int adf_cfg_dev_add(struct adf_accel_dev *accel_dev)
+{
+ struct adf_cfg_device_data *dev_cfg_data;
+
+ dev_cfg_data = kzalloc(sizeof(*dev_cfg_data), GFP_KERNEL);
+ if (!dev_cfg_data)
+ return -ENOMEM;
+ INIT_LIST_HEAD(&dev_cfg_data->sec_list);
+ init_rwsem(&dev_cfg_data->lock);
+ accel_dev->cfg = dev_cfg_data;
+
+ /* accel_dev->debugfs_dir should always be non-NULL here */
+ dev_cfg_data->debug = debugfs_create_file("dev_cfg", S_IRUSR,
+ accel_dev->debugfs_dir,
+ dev_cfg_data,
+ &qat_dev_cfg_fops);
+ if (!dev_cfg_data->debug) {
+ dev_err(&GET_DEV(accel_dev),
+ "Failed to create qat cfg debugfs entry.\n");
+ kfree(dev_cfg_data);
+ accel_dev->cfg = NULL;
+ return -EFAULT;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adf_cfg_dev_add);
+
+static void adf_cfg_section_del_all(struct list_head *head);
+
+void adf_cfg_del_all(struct adf_accel_dev *accel_dev)
+{
+ struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
+
+ down_write(&dev_cfg_data->lock);
+ adf_cfg_section_del_all(&dev_cfg_data->sec_list);
+ up_write(&dev_cfg_data->lock);
+ clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
+}
+
+/**
+ * adf_cfg_dev_remove() - Clears acceleration device configuration table.
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * Function removes configuration table from the given acceleration device
+ * and frees all allocated memory.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: void
+ */
+void adf_cfg_dev_remove(struct adf_accel_dev *accel_dev)
+{
+ struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
+
+ down_write(&dev_cfg_data->lock);
+ adf_cfg_section_del_all(&dev_cfg_data->sec_list);
+ up_write(&dev_cfg_data->lock);
+ debugfs_remove(dev_cfg_data->debug);
+ kfree(dev_cfg_data);
+ accel_dev->cfg = NULL;
+}
+EXPORT_SYMBOL_GPL(adf_cfg_dev_remove);
+
+static void adf_cfg_keyval_add(struct adf_cfg_key_val *new,
+ struct adf_cfg_section *sec)
+{
+ list_add_tail(&new->list, &sec->param_head);
+}
+
+static void adf_cfg_keyval_del_all(struct list_head *head)
+{
+ struct list_head *list_ptr, *tmp;
+
+ list_for_each_prev_safe(list_ptr, tmp, head) {
+ struct adf_cfg_key_val *ptr =
+ list_entry(list_ptr, struct adf_cfg_key_val, list);
+ list_del(list_ptr);
+ kfree(ptr);
+ }
+}
+
+static void adf_cfg_section_del_all(struct list_head *head)
+{
+ struct adf_cfg_section *ptr;
+ struct list_head *list, *tmp;
+
+ list_for_each_prev_safe(list, tmp, head) {
+ ptr = list_entry(list, struct adf_cfg_section, list);
+ adf_cfg_keyval_del_all(&ptr->param_head);
+ list_del(list);
+ kfree(ptr);
+ }
+}
+
+static struct adf_cfg_key_val *adf_cfg_key_value_find(struct adf_cfg_section *s,
+ const char *key)
+{
+ struct list_head *list;
+
+ list_for_each(list, &s->param_head) {
+ struct adf_cfg_key_val *ptr =
+ list_entry(list, struct adf_cfg_key_val, list);
+ if (!strcmp(ptr->key, key))
+ return ptr;
+ }
+ return NULL;
+}
+
+static struct adf_cfg_section *adf_cfg_sec_find(struct adf_accel_dev *accel_dev,
+ const char *sec_name)
+{
+ struct adf_cfg_device_data *cfg = accel_dev->cfg;
+ struct list_head *list;
+
+ list_for_each(list, &cfg->sec_list) {
+ struct adf_cfg_section *ptr =
+ list_entry(list, struct adf_cfg_section, list);
+ if (!strcmp(ptr->name, sec_name))
+ return ptr;
+ }
+ return NULL;
+}
+
+static int adf_cfg_key_val_get(struct adf_accel_dev *accel_dev,
+ const char *sec_name,
+ const char *key_name,
+ char *val)
+{
+ struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, sec_name);
+ struct adf_cfg_key_val *keyval = NULL;
+
+ if (sec)
+ keyval = adf_cfg_key_value_find(sec, key_name);
+ if (keyval) {
+ memcpy(val, keyval->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES);
+ return 0;
+ }
+ return -1;
+}
+
+/**
+ * adf_cfg_add_key_value_param() - Add key-value config entry to config table.
+ * @accel_dev: Pointer to acceleration device.
+ * @section_name: Name of the section where the param will be added
+ * @key: The key string
+ * @val: Value pain for the given @key
+ * @type: Type - string, int or address
+ *
+ * Function adds configuration key - value entry in the appropriate section
+ * in the given acceleration device
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 0 on success, error code othewise.
+ */
+int adf_cfg_add_key_value_param(struct adf_accel_dev *accel_dev,
+ const char *section_name,
+ const char *key, const void *val,
+ enum adf_cfg_val_type type)
+{
+ struct adf_cfg_device_data *cfg = accel_dev->cfg;
+ struct adf_cfg_key_val *key_val;
+ struct adf_cfg_section *section = adf_cfg_sec_find(accel_dev,
+ section_name);
+ if (!section)
+ return -EFAULT;
+
+ key_val = kzalloc(sizeof(*key_val), GFP_KERNEL);
+ if (!key_val)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&key_val->list);
+ strlcpy(key_val->key, key, sizeof(key_val->key));
+
+ if (type == ADF_DEC) {
+ snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
+ "%ld", (*((long *)val)));
+ } else if (type == ADF_STR) {
+ strlcpy(key_val->val, (char *)val, sizeof(key_val->val));
+ } else if (type == ADF_HEX) {
+ snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
+ "0x%lx", (unsigned long)val);
+ } else {
+ dev_err(&GET_DEV(accel_dev), "Unknown type given.\n");
+ kfree(key_val);
+ return -1;
+ }
+ key_val->type = type;
+ down_write(&cfg->lock);
+ adf_cfg_keyval_add(key_val, section);
+ up_write(&cfg->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adf_cfg_add_key_value_param);
+
+/**
+ * adf_cfg_section_add() - Add config section entry to config table.
+ * @accel_dev: Pointer to acceleration device.
+ * @name: Name of the section
+ *
+ * Function adds configuration section where key - value entries
+ * will be stored.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 0 on success, error code othewise.
+ */
+int adf_cfg_section_add(struct adf_accel_dev *accel_dev, const char *name)
+{
+ struct adf_cfg_device_data *cfg = accel_dev->cfg;
+ struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, name);
+
+ if (sec)
+ return 0;
+
+ sec = kzalloc(sizeof(*sec), GFP_KERNEL);
+ if (!sec)
+ return -ENOMEM;
+
+ strlcpy(sec->name, name, sizeof(sec->name));
+ INIT_LIST_HEAD(&sec->param_head);
+ down_write(&cfg->lock);
+ list_add_tail(&sec->list, &cfg->sec_list);
+ up_write(&cfg->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adf_cfg_section_add);
+
+int adf_cfg_get_param_value(struct adf_accel_dev *accel_dev,
+ const char *section, const char *name,
+ char *value)
+{
+ struct adf_cfg_device_data *cfg = accel_dev->cfg;
+ int ret;
+
+ down_read(&cfg->lock);
+ ret = adf_cfg_key_val_get(accel_dev, section, name, value);
+ up_read(&cfg->lock);
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff