kernel/drivers/crypto/qat/qat_common/adf_ctl_drv.c

   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/module.h>
  48 #include <linux/mutex.h>
  49 #include <linux/slab.h>
  50 #include <linux/fs.h>
  51 #include <linux/bitops.h>
  52 #include <linux/pci.h>
  53 #include <linux/cdev.h>
  54 #include <linux/uaccess.h>
  55 #include <linux/crypto.h>
  56
  57 #include "adf_accel_devices.h"
  58 #include "adf_common_drv.h"
  59 #include "adf_cfg.h"
  60 #include "adf_cfg_common.h"
  61 #include "adf_cfg_user.h"
  62
  63 #define DEVICE_NAME "qat_adf_ctl"
  64
  65 static DEFINE_MUTEX(adf_ctl_lock);
  66 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
  67
  68 static const struct file_operations adf_ctl_ops = {
  69         .owner = THIS_MODULE,
  70         .unlocked_ioctl = adf_ctl_ioctl,
  71         .compat_ioctl = adf_ctl_ioctl,
  72 };
  73
  74 struct adf_ctl_drv_info {
  75         unsigned int major;
  76         struct cdev drv_cdev;
  77         struct class *drv_class;
  78 };
  79
  80 static struct adf_ctl_drv_info adf_ctl_drv;
  81
  82 static void adf_chr_drv_destroy(void)
  83 {
  84         device_destroy(adf_ctl_drv.drv_class, MKDEV(adf_ctl_drv.major, 0));
  85         cdev_del(&adf_ctl_drv.drv_cdev);
  86         class_destroy(adf_ctl_drv.drv_class);
  87         unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1);
  88 }
  89
  90 static int adf_chr_drv_create(void)
  91 {
  92         dev_t dev_id;
  93         struct device *drv_device;
  94
  95         if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
  96                 pr_err("QAT: unable to allocate chrdev region\n");
  97                 return -EFAULT;
  98         }
  99
 100         adf_ctl_drv.drv_class = class_create(THIS_MODULE, DEVICE_NAME);
 101         if (IS_ERR(adf_ctl_drv.drv_class)) {
 102                 pr_err("QAT: class_create failed for adf_ctl\n");
 103                 goto err_chrdev_unreg;
 104         }
 105         adf_ctl_drv.major = MAJOR(dev_id);
 106         cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops);
 107         if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) {
 108                 pr_err("QAT: cdev add failed\n");
 109                 goto err_class_destr;
 110         }
 111
 112         drv_device = device_create(adf_ctl_drv.drv_class, NULL,
 113                                    MKDEV(adf_ctl_drv.major, 0),
 114                                    NULL, DEVICE_NAME);
 115         if (IS_ERR(drv_device)) {
 116                 pr_err("QAT: failed to create device\n");
 117                 goto err_cdev_del;
 118         }
 119         return 0;
 120 err_cdev_del:
 121         cdev_del(&adf_ctl_drv.drv_cdev);
 122 err_class_destr:
 123         class_destroy(adf_ctl_drv.drv_class);
 124 err_chrdev_unreg:
 125         unregister_chrdev_region(dev_id, 1);
 126         return -EFAULT;
 127 }
 128
 129 static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data,
 130                                    unsigned long arg)
 131 {
 132         struct adf_user_cfg_ctl_data *cfg_data;
 133
 134         cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL);
 135         if (!cfg_data)
 136                 return -ENOMEM;
 137
 138         /* Initialize device id to NO DEVICE as 0 is a valid device id */
 139         cfg_data->device_id = ADF_CFG_NO_DEVICE;
 140
 141         if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) {
 142                 pr_err("QAT: failed to copy from user cfg_data.\n");
 143                 kfree(cfg_data);
 144                 return -EIO;
 145         }
 146
 147         *ctl_data = cfg_data;
 148         return 0;
 149 }
 150
 151 static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
 152                                   const char *section,
 153                                   const struct adf_user_cfg_key_val *key_val)
 154 {
 155         if (key_val->type == ADF_HEX) {
 156                 long *ptr = (long *)key_val->val;
 157                 long val = *ptr;
 158
 159                 if (adf_cfg_add_key_value_param(accel_dev, section,
 160                                                 key_val->key, (void *)val,
 161                                                 key_val->type)) {
 162                         dev_err(&GET_DEV(accel_dev),
 163                                 "failed to add hex keyvalue.\n");
 164                         return -EFAULT;
 165                 }
 166         } else {
 167                 if (adf_cfg_add_key_value_param(accel_dev, section,
 168                                                 key_val->key, key_val->val,
 169                                                 key_val->type)) {
 170                         dev_err(&GET_DEV(accel_dev),
 171                                 "failed to add keyvalue.\n");
 172                         return -EFAULT;
 173                 }
 174         }
 175         return 0;
 176 }
 177
 178 static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
 179                                    struct adf_user_cfg_ctl_data *ctl_data)
 180 {
 181         struct adf_user_cfg_key_val key_val;
 182         struct adf_user_cfg_key_val *params_head;
 183         struct adf_user_cfg_section section, *section_head;
 184
 185         section_head = ctl_data->config_section;
 186
 187         while (section_head) {
 188                 if (copy_from_user(&section, (void __user *)section_head,
 189                                    sizeof(*section_head))) {
 190                         dev_err(&GET_DEV(accel_dev),
 191                                 "failed to copy section info\n");
 192                         goto out_err;
 193                 }
 194
 195                 if (adf_cfg_section_add(accel_dev, section.name)) {
 196                         dev_err(&GET_DEV(accel_dev),
 197                                 "failed to add section.\n");
 198                         goto out_err;
 199                 }
 200
 201                 params_head = section_head->params;
 202
 203                 while (params_head) {
 204                         if (copy_from_user(&key_val, (void __user *)params_head,
 205                                            sizeof(key_val))) {
 206                                 dev_err(&GET_DEV(accel_dev),
 207                                         "Failed to copy keyvalue.\n");
 208                                 goto out_err;
 209                         }
 210                         if (adf_add_key_value_data(accel_dev, section.name,
 211                                                    &key_val)) {
 212                                 goto out_err;
 213                         }
 214                         params_head = key_val.next;
 215                 }
 216                 section_head = section.next;
 217         }
 218         return 0;
 219 out_err:
 220         adf_cfg_del_all(accel_dev);
 221         return -EFAULT;
 222 }
 223
 224 static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
 225                                     unsigned long arg)
 226 {
 227         int ret;
 228         struct adf_user_cfg_ctl_data *ctl_data;
 229         struct adf_accel_dev *accel_dev;
 230
 231         ret = adf_ctl_alloc_resources(&ctl_data, arg);
 232         if (ret)
 233                 return ret;
 234
 235         accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
 236         if (!accel_dev) {
 237                 ret = -EFAULT;
 238                 goto out;
 239         }
 240
 241         if (adf_dev_started(accel_dev)) {
 242                 ret = -EFAULT;
 243                 goto out;
 244         }
 245
 246         if (adf_copy_key_value_data(accel_dev, ctl_data)) {
 247                 ret = -EFAULT;
 248                 goto out;
 249         }
 250         set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
 251 out:
 252         kfree(ctl_data);
 253         return ret;
 254 }
 255
 256 static int adf_ctl_is_device_in_use(int id)
 257 {
 258         struct list_head *itr, *head = adf_devmgr_get_head();
 259
 260         list_for_each(itr, head) {
 261                 struct adf_accel_dev *dev =
 262                                 list_entry(itr, struct adf_accel_dev, list);
 263
 264                 if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
 265                         if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
 266                                 dev_info(&GET_DEV(dev),
 267                                          "device qat_dev%d is busy\n",
 268                                          dev->accel_id);
 269                                 return -EBUSY;
 270                         }
 271                 }
 272         }
 273         return 0;
 274 }
 275
 276 static int adf_ctl_stop_devices(uint32_t id)
 277 {
 278         struct list_head *itr, *head = adf_devmgr_get_head();
 279         int ret = 0;
 280
 281         list_for_each(itr, head) {
 282                 struct adf_accel_dev *accel_dev =
 283                                 list_entry(itr, struct adf_accel_dev, list);
 284                 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
 285                         if (!adf_dev_started(accel_dev))
 286                                 continue;
 287
 288                         if (adf_dev_stop(accel_dev)) {
 289                                 dev_err(&GET_DEV(accel_dev),
 290                                         "Failed to stop qat_dev%d\n", id);
 291                                 ret = -EFAULT;
 292                         } else {
 293                                 adf_dev_shutdown(accel_dev);
 294                         }
 295                 }
 296         }
 297         return ret;
 298 }
 299
 300 static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
 301                                   unsigned long arg)
 302 {
 303         int ret;
 304         struct adf_user_cfg_ctl_data *ctl_data;
 305
 306         ret = adf_ctl_alloc_resources(&ctl_data, arg);
 307         if (ret)
 308                 return ret;
 309
 310         if (adf_devmgr_verify_id(ctl_data->device_id)) {
 311                 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
 312                 ret = -ENODEV;
 313                 goto out;
 314         }
 315
 316         ret = adf_ctl_is_device_in_use(ctl_data->device_id);
 317         if (ret)
 318                 goto out;
 319
 320         if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
 321                 pr_info("QAT: Stopping all acceleration devices.\n");
 322         else
 323                 pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
 324                         ctl_data->device_id);
 325
 326         ret = adf_ctl_stop_devices(ctl_data->device_id);
 327         if (ret)
 328                 pr_err("QAT: failed to stop device.\n");
 329 out:
 330         kfree(ctl_data);
 331         return ret;
 332 }
 333
 334 static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
 335                                    unsigned long arg)
 336 {
 337         int ret;
 338         struct adf_user_cfg_ctl_data *ctl_data;
 339         struct adf_accel_dev *accel_dev;
 340
 341         ret = adf_ctl_alloc_resources(&ctl_data, arg);
 342         if (ret)
 343                 return ret;
 344
 345         accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
 346         if (!accel_dev) {
 347                 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
 348                 ret = -ENODEV;
 349                 goto out;
 350         }
 351
 352         if (!adf_dev_started(accel_dev)) {
 353                 dev_info(&GET_DEV(accel_dev),
 354                          "Starting acceleration device qat_dev%d.\n",
 355                          ctl_data->device_id);
 356                 ret = adf_dev_init(accel_dev);
 357                 if (!ret)
 358                         ret = adf_dev_start(accel_dev);
 359         } else {
 360                 dev_info(&GET_DEV(accel_dev),
 361                          "Acceleration device qat_dev%d already started.\n",
 362                          ctl_data->device_id);
 363         }
 364         if (ret) {
 365                 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
 366                         ctl_data->device_id);
 367                 adf_dev_stop(accel_dev);
 368                 adf_dev_shutdown(accel_dev);
 369         }
 370 out:
 371         kfree(ctl_data);
 372         return ret;
 373 }
 374
 375 static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
 376                                          unsigned long arg)
 377 {
 378         uint32_t num_devices = 0;
 379
 380         adf_devmgr_get_num_dev(&num_devices);
 381         if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
 382                 return -EFAULT;
 383
 384         return 0;
 385 }
 386
 387 static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
 388                                     unsigned long arg)
 389 {
 390         struct adf_hw_device_data *hw_data;
 391         struct adf_dev_status_info dev_info;
 392         struct adf_accel_dev *accel_dev;
 393
 394         if (copy_from_user(&dev_info, (void __user *)arg,
 395                            sizeof(struct adf_dev_status_info))) {
 396                 pr_err("QAT: failed to copy from user.\n");
 397                 return -EFAULT;
 398         }
 399
 400         accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
 401         if (!accel_dev) {
 402                 pr_err("QAT: Device %d not found\n", dev_info.accel_id);
 403                 return -ENODEV;
 404         }
 405         hw_data = accel_dev->hw_device;
 406         dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
 407         dev_info.num_ae = hw_data->get_num_aes(hw_data);
 408         dev_info.num_accel = hw_data->get_num_accels(hw_data);
 409         dev_info.num_logical_accel = hw_data->num_logical_accel;
 410         dev_info.banks_per_accel = hw_data->num_banks
 411                                         / hw_data->num_logical_accel;
 412         strlcpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
 413         dev_info.instance_id = hw_data->instance_id;
 414         dev_info.type = hw_data->dev_class->type;
 415         dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
 416         dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
 417         dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
 418
 419         if (copy_to_user((void __user *)arg, &dev_info,
 420                          sizeof(struct adf_dev_status_info))) {
 421                 dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
 422                 return -EFAULT;
 423         }
 424         return 0;
 425 }
 426
 427 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 428 {
 429         int ret;
 430
 431         if (mutex_lock_interruptible(&adf_ctl_lock))
 432                 return -EFAULT;
 433
 434         switch (cmd) {
 435         case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
 436                 ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
 437                 break;
 438
 439         case IOCTL_STOP_ACCEL_DEV:
 440                 ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
 441                 break;
 442
 443         case IOCTL_START_ACCEL_DEV:
 444                 ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
 445                 break;
 446
 447         case IOCTL_GET_NUM_DEVICES:
 448                 ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
 449                 break;
 450
 451         case IOCTL_STATUS_ACCEL_DEV:
 452                 ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
 453                 break;
 454         default:
 455                 pr_err("QAT: Invalid ioctl\n");
 456                 ret = -EFAULT;
 457                 break;
 458         }
 459         mutex_unlock(&adf_ctl_lock);
 460         return ret;
 461 }
 462
 463 static int __init adf_register_ctl_device_driver(void)
 464 {
 465         mutex_init(&adf_ctl_lock);
 466
 467         if (qat_algs_init())
 468                 goto err_algs_init;
 469
 470         if (adf_chr_drv_create())
 471                 goto err_chr_dev;
 472
 473         if (adf_init_aer())
 474                 goto err_aer;
 475
 476         if (qat_crypto_register())
 477                 goto err_crypto_register;
 478
 479         return 0;
 480
 481 err_crypto_register:
 482         adf_exit_aer();
 483 err_aer:
 484         adf_chr_drv_destroy();
 485 err_chr_dev:
 486         qat_algs_exit();
 487 err_algs_init:
 488         mutex_destroy(&adf_ctl_lock);
 489         return -EFAULT;
 490 }
 491
 492 static void __exit adf_unregister_ctl_device_driver(void)
 493 {
 494         adf_chr_drv_destroy();
 495         adf_exit_aer();
 496         qat_crypto_unregister();
 497         qat_algs_exit();
 498         mutex_destroy(&adf_ctl_lock);
 499 }
 500
 501 module_init(adf_register_ctl_device_driver);
 502 module_exit(adf_unregister_ctl_device_driver);
 503 MODULE_LICENSE("Dual BSD/GPL");
 504 MODULE_AUTHOR("Intel");
 505 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 506 MODULE_ALIAS_CRYPTO("intel_qat");