1/* 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. 4 5 GPL LICENSE SUMMARY 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. 10 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. 15 16 Contact Information: 17 qat-linux@intel.com 18 19 BSD LICENSE 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 23 are met: 24 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 30 distribution. 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. 34 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, 42 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 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. 46*/ 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" 52#include "adf_cfg.h" 53#include "adf_common_drv.h" 54 55static DEFINE_MUTEX(qat_cfg_read_lock); 56 57static void *qat_dev_cfg_start(struct seq_file *sfile, loff_t *pos) 58{ 59 struct adf_cfg_device_data *dev_cfg = sfile->private; 60 61 mutex_lock(&qat_cfg_read_lock); 62 return seq_list_start(&dev_cfg->sec_list, *pos); 63} 64 65static int qat_dev_cfg_show(struct seq_file *sfile, void *v) 66{ 67 struct list_head *list; 68 struct adf_cfg_section *sec = 69 list_entry(v, struct adf_cfg_section, list); 70 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); 76 } 77 return 0; 78} 79 80static void *qat_dev_cfg_next(struct seq_file *sfile, void *v, loff_t *pos) 81{ 82 struct adf_cfg_device_data *dev_cfg = sfile->private; 83 84 return seq_list_next(v, &dev_cfg->sec_list, pos); 85} 86 87static void qat_dev_cfg_stop(struct seq_file *sfile, void *v) 88{ 89 mutex_unlock(&qat_cfg_read_lock); 90} 91 92static 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 97}; 98 99static int qat_dev_cfg_open(struct inode *inode, struct file *file) 100{ 101 int ret = seq_open(file, &qat_dev_cfg_sops); 102 103 if (!ret) { 104 struct seq_file *seq_f = file->private_data; 105 106 seq_f->private = inode->i_private; 107 } 108 return ret; 109} 110 111static const struct file_operations qat_dev_cfg_fops = { 112 .open = qat_dev_cfg_open, 113 .read = seq_read, 114 .llseek = seq_lseek, 115 .release = seq_release 116}; 117 118/** 119 * adf_cfg_dev_add() - Create an acceleration device configuration table. 120 * @accel_dev: Pointer to acceleration device. 121 * 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. 125 * 126 * Return: 0 on success, error code othewise. 127 */ 128int adf_cfg_dev_add(struct adf_accel_dev *accel_dev) 129{ 130 struct adf_cfg_device_data *dev_cfg_data; 131 132 dev_cfg_data = kzalloc(sizeof(*dev_cfg_data), GFP_KERNEL); 133 if (!dev_cfg_data) 134 return -ENOMEM; 135 INIT_LIST_HEAD(&dev_cfg_data->sec_list); 136 init_rwsem(&dev_cfg_data->lock); 137 accel_dev->cfg = dev_cfg_data; 138 139 /* 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, 142 dev_cfg_data, 143 &qat_dev_cfg_fops); 144 if (!dev_cfg_data->debug) { 145 dev_err(&GET_DEV(accel_dev), 146 "Failed to create qat cfg debugfs entry.\n"); 147 kfree(dev_cfg_data); 148 accel_dev->cfg = NULL; 149 return -EFAULT; 150 } 151 return 0; 152} 153EXPORT_SYMBOL_GPL(adf_cfg_dev_add); 154 155static void adf_cfg_section_del_all(struct list_head *head); 156 157void adf_cfg_del_all(struct adf_accel_dev *accel_dev) 158{ 159 struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg; 160 161 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); 165} 166 167/** 168 * adf_cfg_dev_remove() - Clears acceleration device configuration table. 169 * @accel_dev: Pointer to acceleration device. 170 * 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. 174 * 175 * Return: void 176 */ 177void adf_cfg_dev_remove(struct adf_accel_dev *accel_dev) 178{ 179 struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg; 180 181 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); 185 kfree(dev_cfg_data); 186 accel_dev->cfg = NULL; 187} 188EXPORT_SYMBOL_GPL(adf_cfg_dev_remove); 189 190static void adf_cfg_keyval_add(struct adf_cfg_key_val *new, 191 struct adf_cfg_section *sec) 192{ 193 list_add_tail(&new->list, &sec->param_head); 194} 195 196static void adf_cfg_keyval_del_all(struct list_head *head) 197{ 198 struct list_head *list_ptr, *tmp; 199 200 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); 203 list_del(list_ptr); 204 kfree(ptr); 205 } 206} 207 208static void adf_cfg_section_del_all(struct list_head *head) 209{ 210 struct adf_cfg_section *ptr; 211 struct list_head *list, *tmp; 212 213 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); 216 list_del(list); 217 kfree(ptr); 218 } 219} 220 221static struct adf_cfg_key_val *adf_cfg_key_value_find(struct adf_cfg_section *s, 222 const char *key) 223{ 224 struct list_head *list; 225 226 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)) 230 return ptr; 231 } 232 return NULL; 233} 234 235static struct adf_cfg_section *adf_cfg_sec_find(struct adf_accel_dev *accel_dev, 236 const char *sec_name) 237{ 238 struct adf_cfg_device_data *cfg = accel_dev->cfg; 239 struct list_head *list; 240 241 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)) 245 return ptr; 246 } 247 return NULL; 248} 249 250static int adf_cfg_key_val_get(struct adf_accel_dev *accel_dev, 251 const char *sec_name, 252 const char *key_name, 253 char *val) 254{ 255 struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, sec_name); 256 struct adf_cfg_key_val *keyval = NULL; 257 258 if (sec) 259 keyval = adf_cfg_key_value_find(sec, key_name); 260 if (keyval) { 261 memcpy(val, keyval->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES); 262 return 0; 263 } 264 return -1; 265} 266 267/** 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 274 * 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. 278 * 279 * Return: 0 on success, error code othewise. 280 */ 281int 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) 285{ 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, 289 section_name); 290 if (!section) 291 return -EFAULT; 292 293 key_val = kzalloc(sizeof(*key_val), GFP_KERNEL); 294 if (!key_val) 295 return -ENOMEM; 296 297 INIT_LIST_HEAD(&key_val->list); 298 strlcpy(key_val->key, key, sizeof(key_val->key)); 299 300 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); 308 } else { 309 dev_err(&GET_DEV(accel_dev), "Unknown type given.\n"); 310 kfree(key_val); 311 return -1; 312 } 313 key_val->type = type; 314 down_write(&cfg->lock); 315 adf_cfg_keyval_add(key_val, section); 316 up_write(&cfg->lock); 317 return 0; 318} 319EXPORT_SYMBOL_GPL(adf_cfg_add_key_value_param); 320 321/** 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 325 * 326 * Function adds configuration section where key - value entries 327 * will be stored. 328 * To be used by QAT device specific drivers. 329 * 330 * Return: 0 on success, error code othewise. 331 */ 332int adf_cfg_section_add(struct adf_accel_dev *accel_dev, const char *name) 333{ 334 struct adf_cfg_device_data *cfg = accel_dev->cfg; 335 struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, name); 336 337 if (sec) 338 return 0; 339 340 sec = kzalloc(sizeof(*sec), GFP_KERNEL); 341 if (!sec) 342 return -ENOMEM; 343 344 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); 349 return 0; 350} 351EXPORT_SYMBOL_GPL(adf_cfg_section_add); 352 353int adf_cfg_get_param_value(struct adf_accel_dev *accel_dev, 354 const char *section, const char *name, 355 char *value) 356{ 357 struct adf_cfg_device_data *cfg = accel_dev->cfg; 358 int ret; 359 360 down_read(&cfg->lock); 361 ret = adf_cfg_key_val_get(accel_dev, section, name, value); 362 up_read(&cfg->lock); 363 return ret; 364} 365