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.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 adf_accel_dev *dev;
 259
 260         list_for_each_entry(dev, adf_devmgr_get_head(), list) {
 261                 if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
 262                         if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
 263                                 dev_info(&GET_DEV(dev),
 264                                          "device qat_dev%d is busy\n",
 265                                          dev->accel_id);
 266                                 return -EBUSY;
 267                         }
 268                 }
 269         }
 270         return 0;
 271 }
 272
 273 static int adf_ctl_stop_devices(uint32_t id)
 274 {
 275         struct adf_accel_dev *accel_dev;
 276         int ret = 0;
 277
 278         list_for_each_entry_reverse(accel_dev, adf_devmgr_get_head(), list) {
 279                 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
 280                         if (!adf_dev_started(accel_dev))
 281                                 continue;
 282
 283                         if (adf_dev_stop(accel_dev)) {
 284                                 dev_err(&GET_DEV(accel_dev),
 285                                         "Failed to stop qat_dev%d\n", id);
 286                                 ret = -EFAULT;
 287                         } else {
 288                                 adf_dev_shutdown(accel_dev);
 289                         }
 290                 }
 291         }
 292         return ret;
 293 }
 294
 295 static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
 296                                   unsigned long arg)
 297 {
 298         int ret;
 299         struct adf_user_cfg_ctl_data *ctl_data;
 300
 301         ret = adf_ctl_alloc_resources(&ctl_data, arg);
 302         if (ret)
 303                 return ret;
 304
 305         if (adf_devmgr_verify_id(ctl_data->device_id)) {
 306                 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
 307                 ret = -ENODEV;
 308                 goto out;
 309         }
 310
 311         ret = adf_ctl_is_device_in_use(ctl_data->device_id);
 312         if (ret)
 313                 goto out;
 314
 315         if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
 316                 pr_info("QAT: Stopping all acceleration devices.\n");
 317         else
 318                 pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
 319                         ctl_data->device_id);
 320
 321         ret = adf_ctl_stop_devices(ctl_data->device_id);
 322         if (ret)
 323                 pr_err("QAT: failed to stop device.\n");
 324 out:
 325         kfree(ctl_data);
 326         return ret;
 327 }
 328
 329 static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
 330                                    unsigned long arg)
 331 {
 332         int ret;
 333         struct adf_user_cfg_ctl_data *ctl_data;
 334         struct adf_accel_dev *accel_dev;
 335
 336         ret = adf_ctl_alloc_resources(&ctl_data, arg);
 337         if (ret)
 338                 return ret;
 339
 340         ret = -ENODEV;
 341         accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
 342         if (!accel_dev)
 343                 goto out;
 344
 345         if (!adf_dev_started(accel_dev)) {
 346                 dev_info(&GET_DEV(accel_dev),
 347                          "Starting acceleration device qat_dev%d.\n",
 348                          ctl_data->device_id);
 349                 ret = adf_dev_init(accel_dev);
 350                 if (!ret)
 351                         ret = adf_dev_start(accel_dev);
 352         } else {
 353                 dev_info(&GET_DEV(accel_dev),
 354                          "Acceleration device qat_dev%d already started.\n",
 355                          ctl_data->device_id);
 356         }
 357         if (ret) {
 358                 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
 359                         ctl_data->device_id);
 360                 adf_dev_stop(accel_dev);
 361                 adf_dev_shutdown(accel_dev);
 362         }
 363 out:
 364         kfree(ctl_data);
 365         return ret;
 366 }
 367
 368 static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
 369                                          unsigned long arg)
 370 {
 371         uint32_t num_devices = 0;
 372
 373         adf_devmgr_get_num_dev(&num_devices);
 374         if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
 375                 return -EFAULT;
 376
 377         return 0;
 378 }
 379
 380 static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
 381                                     unsigned long arg)
 382 {
 383         struct adf_hw_device_data *hw_data;
 384         struct adf_dev_status_info dev_info;
 385         struct adf_accel_dev *accel_dev;
 386
 387         if (copy_from_user(&dev_info, (void __user *)arg,
 388                            sizeof(struct adf_dev_status_info))) {
 389                 pr_err("QAT: failed to copy from user.\n");
 390                 return -EFAULT;
 391         }
 392
 393         accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
 394         if (!accel_dev)
 395                 return -ENODEV;
 396
 397         hw_data = accel_dev->hw_device;
 398         dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
 399         dev_info.num_ae = hw_data->get_num_aes(hw_data);
 400         dev_info.num_accel = hw_data->get_num_accels(hw_data);
 401         dev_info.num_logical_accel = hw_data->num_logical_accel;
 402         dev_info.banks_per_accel = hw_data->num_banks
 403                                         / hw_data->num_logical_accel;
 404         strlcpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
 405         dev_info.instance_id = hw_data->instance_id;
 406         dev_info.type = hw_data->dev_class->type;
 407         dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
 408         dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
 409         dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
 410
 411         if (copy_to_user((void __user *)arg, &dev_info,
 412                          sizeof(struct adf_dev_status_info))) {
 413                 dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
 414                 return -EFAULT;
 415         }
 416         return 0;
 417 }
 418
 419 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 420 {
 421         int ret;
 422
 423         if (mutex_lock_interruptible(&adf_ctl_lock))
 424                 return -EFAULT;
 425
 426         switch (cmd) {
 427         case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
 428                 ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
 429                 break;
 430
 431         case IOCTL_STOP_ACCEL_DEV:
 432                 ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
 433                 break;
 434
 435         case IOCTL_START_ACCEL_DEV:
 436                 ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
 437                 break;
 438
 439         case IOCTL_GET_NUM_DEVICES:
 440                 ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
 441                 break;
 442
 443         case IOCTL_STATUS_ACCEL_DEV:
 444                 ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
 445                 break;
 446         default:
 447                 pr_err("QAT: Invalid ioctl\n");
 448                 ret = -EFAULT;
 449                 break;
 450         }
 451         mutex_unlock(&adf_ctl_lock);
 452         return ret;
 453 }
 454
 455 static int __init adf_register_ctl_device_driver(void)
 456 {
 457         mutex_init(&adf_ctl_lock);
 458
 459         if (adf_chr_drv_create())
 460                 goto err_chr_dev;
 461
 462         if (adf_init_aer())
 463                 goto err_aer;
 464
 465         if (adf_init_pf_wq())
 466                 goto err_pf_wq;
 467
 468         if (qat_crypto_register())
 469                 goto err_crypto_register;
 470
 471         return 0;
 472
 473 err_crypto_register:
 474         adf_exit_pf_wq();
 475 err_pf_wq:
 476         adf_exit_aer();
 477 err_aer:
 478         adf_chr_drv_destroy();
 479 err_chr_dev:
 480         mutex_destroy(&adf_ctl_lock);
 481         return -EFAULT;
 482 }
 483
 484 static void __exit adf_unregister_ctl_device_driver(void)
 485 {
 486         adf_chr_drv_destroy();
 487         adf_exit_aer();
 488         adf_exit_pf_wq();
 489         qat_crypto_unregister();
 490         adf_clean_vf_map(false);
 491         mutex_destroy(&adf_ctl_lock);
 492 }
 493
 494 module_init(adf_register_ctl_device_driver);
 495 module_exit(adf_unregister_ctl_device_driver);
 496 MODULE_LICENSE("Dual BSD/GPL");
 497 MODULE_AUTHOR("Intel");
 498 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 499 MODULE_ALIAS_CRYPTO("intel_qat");
 500 MODULE_VERSION(ADF_DRV_VERSION);