2 This file is provided under a dual BSD/GPLv2 license. When using or
3 redistributing this file, you may do so under either license.
6 Copyright(c) 2014 Intel Corporation.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of version 2 of the GNU General Public License as
9 published by the Free Software Foundation.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
20 Copyright(c) 2014 Intel Corporation.
21 Redistribution and use in source and binary forms, with or without
22 modification, are permitted provided that the following conditions
25 * Redistributions of source code must retain the above copyright
26 notice, this list of conditions and the following disclaimer.
27 * Redistributions in binary form must reproduce the above copyright
28 notice, this list of conditions and the following disclaimer in
29 the documentation and/or other materials provided with the
31 * Neither the name of Intel Corporation nor the names of its
32 contributors may be used to endorse or promote products derived
33 from this software without specific prior written permission.
35 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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43 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 #include <linux/mutex.h>
48 #include <linux/slab.h>
49 #include <linux/list.h>
50 #include <linux/seq_file.h>
51 #include "adf_accel_devices.h"
53 #include "adf_common_drv.h"
55 static DEFINE_MUTEX(qat_cfg_read_lock);
57 static void *qat_dev_cfg_start(struct seq_file *sfile, loff_t *pos)
59 struct adf_cfg_device_data *dev_cfg = sfile->private;
61 mutex_lock(&qat_cfg_read_lock);
62 return seq_list_start(&dev_cfg->sec_list, *pos);
65 static int qat_dev_cfg_show(struct seq_file *sfile, void *v)
67 struct list_head *list;
68 struct adf_cfg_section *sec =
69 list_entry(v, struct adf_cfg_section, list);
71 seq_printf(sfile, "[%s]\n", sec->name);
72 list_for_each(list, &sec->param_head) {
73 struct adf_cfg_key_val *ptr =
74 list_entry(list, struct adf_cfg_key_val, list);
75 seq_printf(sfile, "%s = %s\n", ptr->key, ptr->val);
80 static void *qat_dev_cfg_next(struct seq_file *sfile, void *v, loff_t *pos)
82 struct adf_cfg_device_data *dev_cfg = sfile->private;
84 return seq_list_next(v, &dev_cfg->sec_list, pos);
87 static void qat_dev_cfg_stop(struct seq_file *sfile, void *v)
89 mutex_unlock(&qat_cfg_read_lock);
92 static const struct seq_operations qat_dev_cfg_sops = {
93 .start = qat_dev_cfg_start,
94 .next = qat_dev_cfg_next,
95 .stop = qat_dev_cfg_stop,
96 .show = qat_dev_cfg_show
99 static int qat_dev_cfg_open(struct inode *inode, struct file *file)
101 int ret = seq_open(file, &qat_dev_cfg_sops);
104 struct seq_file *seq_f = file->private_data;
106 seq_f->private = inode->i_private;
111 static const struct file_operations qat_dev_cfg_fops = {
112 .open = qat_dev_cfg_open,
115 .release = seq_release
119 * adf_cfg_dev_add() - Create an acceleration device configuration table.
120 * @accel_dev: Pointer to acceleration device.
122 * Function creates a configuration table for the given acceleration device.
123 * The table stores device specific config values.
124 * To be used by QAT device specific drivers.
126 * Return: 0 on success, error code othewise.
128 int adf_cfg_dev_add(struct adf_accel_dev *accel_dev)
130 struct adf_cfg_device_data *dev_cfg_data;
132 dev_cfg_data = kzalloc(sizeof(*dev_cfg_data), GFP_KERNEL);
135 INIT_LIST_HEAD(&dev_cfg_data->sec_list);
136 init_rwsem(&dev_cfg_data->lock);
137 accel_dev->cfg = dev_cfg_data;
139 /* accel_dev->debugfs_dir should always be non-NULL here */
140 dev_cfg_data->debug = debugfs_create_file("dev_cfg", S_IRUSR,
141 accel_dev->debugfs_dir,
144 if (!dev_cfg_data->debug) {
145 dev_err(&GET_DEV(accel_dev),
146 "Failed to create qat cfg debugfs entry.\n");
148 accel_dev->cfg = NULL;
153 EXPORT_SYMBOL_GPL(adf_cfg_dev_add);
155 static void adf_cfg_section_del_all(struct list_head *head);
157 void adf_cfg_del_all(struct adf_accel_dev *accel_dev)
159 struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
161 down_write(&dev_cfg_data->lock);
162 adf_cfg_section_del_all(&dev_cfg_data->sec_list);
163 up_write(&dev_cfg_data->lock);
164 clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
168 * adf_cfg_dev_remove() - Clears acceleration device configuration table.
169 * @accel_dev: Pointer to acceleration device.
171 * Function removes configuration table from the given acceleration device
172 * and frees all allocated memory.
173 * To be used by QAT device specific drivers.
177 void adf_cfg_dev_remove(struct adf_accel_dev *accel_dev)
179 struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg;
181 down_write(&dev_cfg_data->lock);
182 adf_cfg_section_del_all(&dev_cfg_data->sec_list);
183 up_write(&dev_cfg_data->lock);
184 debugfs_remove(dev_cfg_data->debug);
186 accel_dev->cfg = NULL;
188 EXPORT_SYMBOL_GPL(adf_cfg_dev_remove);
190 static void adf_cfg_keyval_add(struct adf_cfg_key_val *new,
191 struct adf_cfg_section *sec)
193 list_add_tail(&new->list, &sec->param_head);
196 static void adf_cfg_keyval_del_all(struct list_head *head)
198 struct list_head *list_ptr, *tmp;
200 list_for_each_prev_safe(list_ptr, tmp, head) {
201 struct adf_cfg_key_val *ptr =
202 list_entry(list_ptr, struct adf_cfg_key_val, list);
208 static void adf_cfg_section_del_all(struct list_head *head)
210 struct adf_cfg_section *ptr;
211 struct list_head *list, *tmp;
213 list_for_each_prev_safe(list, tmp, head) {
214 ptr = list_entry(list, struct adf_cfg_section, list);
215 adf_cfg_keyval_del_all(&ptr->param_head);
221 static struct adf_cfg_key_val *adf_cfg_key_value_find(struct adf_cfg_section *s,
224 struct list_head *list;
226 list_for_each(list, &s->param_head) {
227 struct adf_cfg_key_val *ptr =
228 list_entry(list, struct adf_cfg_key_val, list);
229 if (!strcmp(ptr->key, key))
235 static struct adf_cfg_section *adf_cfg_sec_find(struct adf_accel_dev *accel_dev,
236 const char *sec_name)
238 struct adf_cfg_device_data *cfg = accel_dev->cfg;
239 struct list_head *list;
241 list_for_each(list, &cfg->sec_list) {
242 struct adf_cfg_section *ptr =
243 list_entry(list, struct adf_cfg_section, list);
244 if (!strcmp(ptr->name, sec_name))
250 static int adf_cfg_key_val_get(struct adf_accel_dev *accel_dev,
251 const char *sec_name,
252 const char *key_name,
255 struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, sec_name);
256 struct adf_cfg_key_val *keyval = NULL;
259 keyval = adf_cfg_key_value_find(sec, key_name);
261 memcpy(val, keyval->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES);
268 * adf_cfg_add_key_value_param() - Add key-value config entry to config table.
269 * @accel_dev: Pointer to acceleration device.
270 * @section_name: Name of the section where the param will be added
271 * @key: The key string
272 * @val: Value pain for the given @key
273 * @type: Type - string, int or address
275 * Function adds configuration key - value entry in the appropriate section
276 * in the given acceleration device
277 * To be used by QAT device specific drivers.
279 * Return: 0 on success, error code othewise.
281 int adf_cfg_add_key_value_param(struct adf_accel_dev *accel_dev,
282 const char *section_name,
283 const char *key, const void *val,
284 enum adf_cfg_val_type type)
286 struct adf_cfg_device_data *cfg = accel_dev->cfg;
287 struct adf_cfg_key_val *key_val;
288 struct adf_cfg_section *section = adf_cfg_sec_find(accel_dev,
293 key_val = kzalloc(sizeof(*key_val), GFP_KERNEL);
297 INIT_LIST_HEAD(&key_val->list);
298 strlcpy(key_val->key, key, sizeof(key_val->key));
300 if (type == ADF_DEC) {
301 snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
302 "%ld", (*((long *)val)));
303 } else if (type == ADF_STR) {
304 strlcpy(key_val->val, (char *)val, sizeof(key_val->val));
305 } else if (type == ADF_HEX) {
306 snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES,
307 "0x%lx", (unsigned long)val);
309 dev_err(&GET_DEV(accel_dev), "Unknown type given.\n");
313 key_val->type = type;
314 down_write(&cfg->lock);
315 adf_cfg_keyval_add(key_val, section);
316 up_write(&cfg->lock);
319 EXPORT_SYMBOL_GPL(adf_cfg_add_key_value_param);
322 * adf_cfg_section_add() - Add config section entry to config table.
323 * @accel_dev: Pointer to acceleration device.
324 * @name: Name of the section
326 * Function adds configuration section where key - value entries
328 * To be used by QAT device specific drivers.
330 * Return: 0 on success, error code othewise.
332 int adf_cfg_section_add(struct adf_accel_dev *accel_dev, const char *name)
334 struct adf_cfg_device_data *cfg = accel_dev->cfg;
335 struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, name);
340 sec = kzalloc(sizeof(*sec), GFP_KERNEL);
344 strlcpy(sec->name, name, sizeof(sec->name));
345 INIT_LIST_HEAD(&sec->param_head);
346 down_write(&cfg->lock);
347 list_add_tail(&sec->list, &cfg->sec_list);
348 up_write(&cfg->lock);
351 EXPORT_SYMBOL_GPL(adf_cfg_section_add);
353 int adf_cfg_get_param_value(struct adf_accel_dev *accel_dev,
354 const char *section, const char *name,
357 struct adf_cfg_device_data *cfg = accel_dev->cfg;
360 down_read(&cfg->lock);
361 ret = adf_cfg_key_val_get(accel_dev, section, name, value);