root/drivers/crypto/qat/qat_common/qat_crypto.c

DEFINITIONS

1. qat_crypto_put_instance
2. qat_crypto_free_instances
3. qat_crypto_get_instance_node
4. qat_crypto_dev_config
5. qat_crypto_create_instances
6. qat_crypto_init
7. qat_crypto_shutdown
8. qat_crypto_event_handler
9. qat_crypto_register
10. qat_crypto_unregister

   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/slab.h>
  49 #include "adf_accel_devices.h"
  50 #include "adf_common_drv.h"
  51 #include "adf_transport.h"
  52 #include "adf_transport_access_macros.h"
  53 #include "adf_cfg.h"
  54 #include "adf_cfg_strings.h"
  55 #include "qat_crypto.h"
  56 #include "icp_qat_fw.h"
  57 
  58 #define SEC ADF_KERNEL_SEC
  59 
  60 static struct service_hndl qat_crypto;
  61 
  62 void qat_crypto_put_instance(struct qat_crypto_instance *inst)
  63 {
  64         atomic_dec(&inst->refctr);
  65         adf_dev_put(inst->accel_dev);
  66 }
  67 
  68 static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
  69 {
  70         struct qat_crypto_instance *inst, *tmp;
  71         int i;
  72 
  73         list_for_each_entry_safe(inst, tmp, &accel_dev->crypto_list, list) {
  74                 for (i = 0; i < atomic_read(&inst->refctr); i++)
  75                         qat_crypto_put_instance(inst);
  76 
  77                 if (inst->sym_tx)
  78                         adf_remove_ring(inst->sym_tx);
  79 
  80                 if (inst->sym_rx)
  81                         adf_remove_ring(inst->sym_rx);
  82 
  83                 if (inst->pke_tx)
  84                         adf_remove_ring(inst->pke_tx);
  85 
  86                 if (inst->pke_rx)
  87                         adf_remove_ring(inst->pke_rx);
  88 
  89                 list_del(&inst->list);
  90                 kfree(inst);
  91         }
  92         return 0;
  93 }
  94 
  95 struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
  96 {
  97         struct adf_accel_dev *accel_dev = NULL, *tmp_dev;
  98         struct qat_crypto_instance *inst = NULL, *tmp_inst;
  99         unsigned long best = ~0;
 100 
 101         list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
 102                 unsigned long ctr;
 103 
 104                 if ((node == dev_to_node(&GET_DEV(tmp_dev)) ||
 105                      dev_to_node(&GET_DEV(tmp_dev)) < 0) &&
 106                     adf_dev_started(tmp_dev) &&
 107                     !list_empty(&tmp_dev->crypto_list)) {
 108                         ctr = atomic_read(&tmp_dev->ref_count);
 109                         if (best > ctr) {
 110                                 accel_dev = tmp_dev;
 111                                 best = ctr;
 112                         }
 113                 }
 114         }
 115 
 116         if (!accel_dev) {
 117                 pr_info("QAT: Could not find a device on node %d\n", node);
 118                 /* Get any started device */
 119                 list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
 120                         if (adf_dev_started(tmp_dev) &&
 121                             !list_empty(&tmp_dev->crypto_list)) {
 122                                 accel_dev = tmp_dev;
 123                                 break;
 124                         }
 125                 }
 126         }
 127 
 128         if (!accel_dev)
 129                 return NULL;
 130 
 131         best = ~0;
 132         list_for_each_entry(tmp_inst, &accel_dev->crypto_list, list) {
 133                 unsigned long ctr;
 134 
 135                 ctr = atomic_read(&tmp_inst->refctr);
 136                 if (best > ctr) {
 137                         inst = tmp_inst;
 138                         best = ctr;
 139                 }
 140         }
 141         if (inst) {
 142                 if (adf_dev_get(accel_dev)) {
 143                         dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
 144                         return NULL;
 145                 }
 146                 atomic_inc(&inst->refctr);
 147         }
 148         return inst;
 149 }
 150 
 151 /**
 152  * qat_crypto_dev_config() - create dev config required to create crypto inst.
 153  *
 154  * @accel_dev: Pointer to acceleration device.
 155  *
 156  * Function creates device configuration required to create crypto instances
 157  *
 158  * Return: 0 on success, error code otherwise.
 159  */
 160 int qat_crypto_dev_config(struct adf_accel_dev *accel_dev)
 161 {
 162         int cpus = num_online_cpus();
 163         int banks = GET_MAX_BANKS(accel_dev);
 164         int instances = min(cpus, banks);
 165         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 166         int i;
 167         unsigned long val;
 168 
 169         if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
 170                 goto err;
 171         if (adf_cfg_section_add(accel_dev, "Accelerator0"))
 172                 goto err;
 173         for (i = 0; i < instances; i++) {
 174                 val = i;
 175                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 176                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 177                                                 key, (void *)&val, ADF_DEC))
 178                         goto err;
 179 
 180                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_ETRMGR_CORE_AFFINITY,
 181                          i);
 182                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 183                                                 key, (void *)&val, ADF_DEC))
 184                         goto err;
 185 
 186                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 187                 val = 128;
 188                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 189                                                 key, (void *)&val, ADF_DEC))
 190                         goto err;
 191 
 192                 val = 512;
 193                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 194                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 195                                                 key, (void *)&val, ADF_DEC))
 196                         goto err;
 197 
 198                 val = 0;
 199                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 200                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 201                                                 key, (void *)&val, ADF_DEC))
 202                         goto err;
 203 
 204                 val = 2;
 205                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 206                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 207                                                 key, (void *)&val, ADF_DEC))
 208                         goto err;
 209 
 210                 val = 8;
 211                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 212                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 213                                                 key, (void *)&val, ADF_DEC))
 214                         goto err;
 215 
 216                 val = 10;
 217                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 218                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 219                                                 key, (void *)&val, ADF_DEC))
 220                         goto err;
 221 
 222                 val = ADF_COALESCING_DEF_TIME;
 223                 snprintf(key, sizeof(key), ADF_ETRMGR_COALESCE_TIMER_FORMAT, i);
 224                 if (adf_cfg_add_key_value_param(accel_dev, "Accelerator0",
 225                                                 key, (void *)&val, ADF_DEC))
 226                         goto err;
 227         }
 228 
 229         val = i;
 230         if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 231                                         ADF_NUM_CY, (void *)&val, ADF_DEC))
 232                 goto err;
 233 
 234         set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
 235         return 0;
 236 err:
 237         dev_err(&GET_DEV(accel_dev), "Failed to start QAT accel dev\n");
 238         return -EINVAL;
 239 }
 240 EXPORT_SYMBOL_GPL(qat_crypto_dev_config);
 241 
 242 static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
 243 {
 244         int i;
 245         unsigned long bank;
 246         unsigned long num_inst, num_msg_sym, num_msg_asym;
 247         int msg_size;
 248         struct qat_crypto_instance *inst;
 249         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 250         char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
 251 
 252         INIT_LIST_HEAD(&accel_dev->crypto_list);
 253         strlcpy(key, ADF_NUM_CY, sizeof(key));
 254         if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 255                 return -EFAULT;
 256 
 257         if (kstrtoul(val, 0, &num_inst))
 258                 return -EFAULT;
 259 
 260         for (i = 0; i < num_inst; i++) {
 261                 inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
 262                                     dev_to_node(&GET_DEV(accel_dev)));
 263                 if (!inst)
 264                         goto err;
 265 
 266                 list_add_tail(&inst->list, &accel_dev->crypto_list);
 267                 inst->id = i;
 268                 atomic_set(&inst->refctr, 0);
 269                 inst->accel_dev = accel_dev;
 270                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 271                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 272                         goto err;
 273 
 274                 if (kstrtoul(val, 10, &bank))
 275                         goto err;
 276                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 277                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 278                         goto err;
 279 
 280                 if (kstrtoul(val, 10, &num_msg_sym))
 281                         goto err;
 282 
 283                 num_msg_sym = num_msg_sym >> 1;
 284 
 285                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 286                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 287                         goto err;
 288 
 289                 if (kstrtoul(val, 10, &num_msg_asym))
 290                         goto err;
 291                 num_msg_asym = num_msg_asym >> 1;
 292 
 293                 msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
 294                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 295                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 296                                     msg_size, key, NULL, 0, &inst->sym_tx))
 297                         goto err;
 298 
 299                 msg_size = msg_size >> 1;
 300                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 301                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 302                                     msg_size, key, NULL, 0, &inst->pke_tx))
 303                         goto err;
 304 
 305                 msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
 306                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 307                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 308                                     msg_size, key, qat_alg_callback, 0,
 309                                     &inst->sym_rx))
 310                         goto err;
 311 
 312                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 313                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 314                                     msg_size, key, qat_alg_asym_callback, 0,
 315                                     &inst->pke_rx))
 316                         goto err;
 317         }
 318         return 0;
 319 err:
 320         qat_crypto_free_instances(accel_dev);
 321         return -ENOMEM;
 322 }
 323 
 324 static int qat_crypto_init(struct adf_accel_dev *accel_dev)
 325 {
 326         if (qat_crypto_create_instances(accel_dev))
 327                 return -EFAULT;
 328 
 329         return 0;
 330 }
 331 
 332 static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
 333 {
 334         return qat_crypto_free_instances(accel_dev);
 335 }
 336 
 337 static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
 338                                     enum adf_event event)
 339 {
 340         int ret;
 341 
 342         switch (event) {
 343         case ADF_EVENT_INIT:
 344                 ret = qat_crypto_init(accel_dev);
 345                 break;
 346         case ADF_EVENT_SHUTDOWN:
 347                 ret = qat_crypto_shutdown(accel_dev);
 348                 break;
 349         case ADF_EVENT_RESTARTING:
 350         case ADF_EVENT_RESTARTED:
 351         case ADF_EVENT_START:
 352         case ADF_EVENT_STOP:
 353         default:
 354                 ret = 0;
 355         }
 356         return ret;
 357 }
 358 
 359 int qat_crypto_register(void)
 360 {
 361         memset(&qat_crypto, 0, sizeof(qat_crypto));
 362         qat_crypto.event_hld = qat_crypto_event_handler;
 363         qat_crypto.name = "qat_crypto";
 364         return adf_service_register(&qat_crypto);
 365 }
 366 
 367 int qat_crypto_unregister(void)
 368 {
 369         return adf_service_unregister(&qat_crypto);
 370 }