drivers/crypto/qat/qat_common/qat_crypto.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/slab.h>
  49 #include "adf_accel_devices.h"
  50 #include "adf_common_drv.h"
  51 #include "adf_transport.h"
  52 #include "adf_cfg.h"
  53 #include "adf_cfg_strings.h"
  54 #include "qat_crypto.h"
  55 #include "icp_qat_fw.h"
  56
  57 #define SEC ADF_KERNEL_SEC
  58
  59 static struct service_hndl qat_crypto;
  60
  61 void qat_crypto_put_instance(struct qat_crypto_instance *inst)
  62 {
  63         if (atomic_sub_return(1, &inst->refctr) == 0)
  64                 adf_dev_put(inst->accel_dev);
  65 }
  66
  67 static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
  68 {
  69         struct qat_crypto_instance *inst;
  70         struct list_head *list_ptr, *tmp;
  71         int i;
  72
  73         list_for_each_safe(list_ptr, tmp, &accel_dev->crypto_list) {
  74                 inst = list_entry(list_ptr, struct qat_crypto_instance, list);
  75
  76                 for (i = 0; i < atomic_read(&inst->refctr); i++)
  77                         qat_crypto_put_instance(inst);
  78
  79                 if (inst->sym_tx)
  80                         adf_remove_ring(inst->sym_tx);
  81
  82                 if (inst->sym_rx)
  83                         adf_remove_ring(inst->sym_rx);
  84
  85                 if (inst->pke_tx)
  86                         adf_remove_ring(inst->pke_tx);
  87
  88                 if (inst->pke_rx)
  89                         adf_remove_ring(inst->pke_rx);
  90
  91                 if (inst->rnd_tx)
  92                         adf_remove_ring(inst->rnd_tx);
  93
  94                 if (inst->rnd_rx)
  95                         adf_remove_ring(inst->rnd_rx);
  96
  97                 list_del(list_ptr);
  98                 kfree(inst);
  99         }
 100         return 0;
 101 }
 102
 103 struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
 104 {
 105         struct adf_accel_dev *accel_dev = NULL;
 106         struct qat_crypto_instance *inst_best = NULL;
 107         struct list_head *itr;
 108         unsigned long best = ~0;
 109
 110         list_for_each(itr, adf_devmgr_get_head()) {
 111                 accel_dev = list_entry(itr, struct adf_accel_dev, list);
 112                 if ((node == dev_to_node(&GET_DEV(accel_dev)) ||
 113                         dev_to_node(&GET_DEV(accel_dev)) < 0)
 114                                 && adf_dev_started(accel_dev))
 115                         break;
 116                 accel_dev = NULL;
 117         }
 118         if (!accel_dev) {
 119                 pr_err("QAT: Could not find device on node %d\n", node);
 120                 accel_dev = adf_devmgr_get_first();
 121         }
 122         if (!accel_dev || !adf_dev_started(accel_dev))
 123                 return NULL;
 124
 125         list_for_each(itr, &accel_dev->crypto_list) {
 126                 struct qat_crypto_instance *inst;
 127                 unsigned long cur;
 128
 129                 inst = list_entry(itr, struct qat_crypto_instance, list);
 130                 cur = atomic_read(&inst->refctr);
 131                 if (best > cur) {
 132                         inst_best = inst;
 133                         best = cur;
 134                 }
 135         }
 136         if (inst_best) {
 137                 if (atomic_add_return(1, &inst_best->refctr) == 1) {
 138                         if (adf_dev_get(accel_dev)) {
 139                                 atomic_dec(&inst_best->refctr);
 140                                 pr_err("QAT: Could increment dev refctr\n");
 141                                 return NULL;
 142                         }
 143                 }
 144         }
 145         return inst_best;
 146 }
 147
 148 static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
 149 {
 150         int i;
 151         unsigned long bank;
 152         unsigned long num_inst, num_msg_sym, num_msg_asym;
 153         int msg_size;
 154         struct qat_crypto_instance *inst;
 155         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 156         char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
 157
 158         INIT_LIST_HEAD(&accel_dev->crypto_list);
 159         strlcpy(key, ADF_NUM_CY, sizeof(key));
 160
 161         if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 162                 return -EFAULT;
 163
 164         if (kstrtoul(val, 0, &num_inst))
 165                 return -EFAULT;
 166
 167         for (i = 0; i < num_inst; i++) {
 168                 inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
 169                                     dev_to_node(&GET_DEV(accel_dev)));
 170                 if (!inst)
 171                         goto err;
 172
 173                 list_add_tail(&inst->list, &accel_dev->crypto_list);
 174                 inst->id = i;
 175                 atomic_set(&inst->refctr, 0);
 176                 inst->accel_dev = accel_dev;
 177                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 178                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 179                         goto err;
 180
 181                 if (kstrtoul(val, 10, &bank))
 182                         goto err;
 183                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 184                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 185                         goto err;
 186
 187                 if (kstrtoul(val, 10, &num_msg_sym))
 188                         goto err;
 189                 num_msg_sym = num_msg_sym >> 1;
 190                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 191                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 192                         goto err;
 193
 194                 if (kstrtoul(val, 10, &num_msg_asym))
 195                         goto err;
 196                 num_msg_asym = num_msg_asym >> 1;
 197
 198                 msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
 199                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 200                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 201                                     msg_size, key, NULL, 0, &inst->sym_tx))
 202                         goto err;
 203
 204                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_TX, i);
 205                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 206                                     msg_size, key, NULL, 0, &inst->rnd_tx))
 207                         goto err;
 208
 209                 msg_size = msg_size >> 1;
 210                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 211                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 212                                     msg_size, key, NULL, 0, &inst->pke_tx))
 213                         goto err;
 214
 215                 msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
 216                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 217                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 218                                     msg_size, key, qat_alg_callback, 0,
 219                                     &inst->sym_rx))
 220                         goto err;
 221
 222                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_RND_RX, i);
 223                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 224                                     msg_size, key, qat_alg_callback, 0,
 225                                     &inst->rnd_rx))
 226                         goto err;
 227
 228                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 229                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 230                                     msg_size, key, qat_alg_callback, 0,
 231                                     &inst->pke_rx))
 232                         goto err;
 233         }
 234         return 0;
 235 err:
 236         qat_crypto_free_instances(accel_dev);
 237         return -ENOMEM;
 238 }
 239
 240 static int qat_crypto_init(struct adf_accel_dev *accel_dev)
 241 {
 242         if (qat_crypto_create_instances(accel_dev))
 243                 return -EFAULT;
 244
 245         return 0;
 246 }
 247
 248 static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
 249 {
 250         return qat_crypto_free_instances(accel_dev);
 251 }
 252
 253 static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
 254                                     enum adf_event event)
 255 {
 256         int ret;
 257
 258         switch (event) {
 259         case ADF_EVENT_INIT:
 260                 ret = qat_crypto_init(accel_dev);
 261                 break;
 262         case ADF_EVENT_SHUTDOWN:
 263                 ret = qat_crypto_shutdown(accel_dev);
 264                 break;
 265         case ADF_EVENT_RESTARTING:
 266         case ADF_EVENT_RESTARTED:
 267         case ADF_EVENT_START:
 268         case ADF_EVENT_STOP:
 269         default:
 270                 ret = 0;
 271         }
 272         return ret;
 273 }
 274
 275 int qat_crypto_register(void)
 276 {
 277         memset(&qat_crypto, 0, sizeof(qat_crypto));
 278         qat_crypto.event_hld = qat_crypto_event_handler;
 279         qat_crypto.name = "qat_crypto";
 280         return adf_service_register(&qat_crypto);
 281 }
 282
 283 int qat_crypto_unregister(void)
 284 {
 285         return adf_service_unregister(&qat_crypto);
 286 }