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         atomic_dec(&inst->refctr);
  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                 list_del(list_ptr);
  92                 kfree(inst);
  93         }
  94         return 0;
  95 }
  96
  97 struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
  98 {
  99         struct adf_accel_dev *accel_dev = NULL;
 100         struct qat_crypto_instance *inst = NULL;
 101         struct list_head *itr;
 102         unsigned long best = ~0;
 103
 104         list_for_each(itr, adf_devmgr_get_head()) {
 105                 struct adf_accel_dev *tmp_dev;
 106                 unsigned long ctr;
 107
 108                 tmp_dev = list_entry(itr, struct adf_accel_dev, list);
 109
 110                 if ((node == dev_to_node(&GET_DEV(tmp_dev)) ||
 111                      dev_to_node(&GET_DEV(tmp_dev)) < 0) &&
 112                     adf_dev_started(tmp_dev) &&
 113                     !list_empty(&tmp_dev->crypto_list)) {
 114                         ctr = atomic_read(&tmp_dev->ref_count);
 115                         if (best > ctr) {
 116                                 accel_dev = tmp_dev;
 117                                 best = ctr;
 118                         }
 119                 }
 120         }
 121         if (!accel_dev)
 122                 pr_info("QAT: Could not find a device on node %d\n", node);
 123
 124         /* Get any started device */
 125         list_for_each(itr, adf_devmgr_get_head()) {
 126                 struct adf_accel_dev *tmp_dev;
 127
 128                 tmp_dev = list_entry(itr, struct adf_accel_dev, list);
 129
 130                 if (adf_dev_started(tmp_dev) &&
 131                     !list_empty(&tmp_dev->crypto_list)) {
 132                         accel_dev = tmp_dev;
 133                         break;
 134                 }
 135         }
 136
 137         if (!accel_dev)
 138                 return NULL;
 139
 140         best = ~0;
 141         list_for_each(itr, &accel_dev->crypto_list) {
 142                 struct qat_crypto_instance *tmp_inst;
 143                 unsigned long ctr;
 144
 145                 tmp_inst = list_entry(itr, struct qat_crypto_instance, list);
 146                 ctr = atomic_read(&tmp_inst->refctr);
 147                 if (best > ctr) {
 148                         inst = tmp_inst;
 149                         best = ctr;
 150                 }
 151         }
 152         if (inst) {
 153                 if (adf_dev_get(accel_dev)) {
 154                         dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
 155                         return NULL;
 156                 }
 157                 atomic_inc(&inst->refctr);
 158         }
 159         return inst;
 160 }
 161
 162 static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
 163 {
 164         int i;
 165         unsigned long bank;
 166         unsigned long num_inst, num_msg_sym, num_msg_asym;
 167         int msg_size;
 168         struct qat_crypto_instance *inst;
 169         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 170         char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
 171
 172         INIT_LIST_HEAD(&accel_dev->crypto_list);
 173         strlcpy(key, ADF_NUM_CY, sizeof(key));
 174         if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 175                 return -EFAULT;
 176
 177         if (kstrtoul(val, 0, &num_inst))
 178                 return -EFAULT;
 179
 180         for (i = 0; i < num_inst; i++) {
 181                 inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
 182                                     dev_to_node(&GET_DEV(accel_dev)));
 183                 if (!inst)
 184                         goto err;
 185
 186                 list_add_tail(&inst->list, &accel_dev->crypto_list);
 187                 inst->id = i;
 188                 atomic_set(&inst->refctr, 0);
 189                 inst->accel_dev = accel_dev;
 190                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 191                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 192                         goto err;
 193
 194                 if (kstrtoul(val, 10, &bank))
 195                         goto err;
 196                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 197                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 198                         goto err;
 199
 200                 if (kstrtoul(val, 10, &num_msg_sym))
 201                         goto err;
 202
 203                 num_msg_sym = num_msg_sym >> 1;
 204
 205                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 206                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 207                         goto err;
 208
 209                 if (kstrtoul(val, 10, &num_msg_asym))
 210                         goto err;
 211                 num_msg_asym = num_msg_asym >> 1;
 212
 213                 msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
 214                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 215                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 216                                     msg_size, key, NULL, 0, &inst->sym_tx))
 217                         goto err;
 218
 219                 msg_size = msg_size >> 1;
 220                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 221                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 222                                     msg_size, key, NULL, 0, &inst->pke_tx))
 223                         goto err;
 224
 225                 msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
 226                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 227                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 228                                     msg_size, key, qat_alg_callback, 0,
 229                                     &inst->sym_rx))
 230                         goto err;
 231
 232                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 233                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 234                                     msg_size, key, qat_alg_asym_callback, 0,
 235                                     &inst->pke_rx))
 236                         goto err;
 237         }
 238         return 0;
 239 err:
 240         qat_crypto_free_instances(accel_dev);
 241         return -ENOMEM;
 242 }
 243
 244 static int qat_crypto_init(struct adf_accel_dev *accel_dev)
 245 {
 246         if (qat_crypto_create_instances(accel_dev))
 247                 return -EFAULT;
 248
 249         return 0;
 250 }
 251
 252 static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
 253 {
 254         return qat_crypto_free_instances(accel_dev);
 255 }
 256
 257 static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
 258                                     enum adf_event event)
 259 {
 260         int ret;
 261
 262         switch (event) {
 263         case ADF_EVENT_INIT:
 264                 ret = qat_crypto_init(accel_dev);
 265                 break;
 266         case ADF_EVENT_SHUTDOWN:
 267                 ret = qat_crypto_shutdown(accel_dev);
 268                 break;
 269         case ADF_EVENT_RESTARTING:
 270         case ADF_EVENT_RESTARTED:
 271         case ADF_EVENT_START:
 272         case ADF_EVENT_STOP:
 273         default:
 274                 ret = 0;
 275         }
 276         return ret;
 277 }
 278
 279 int qat_crypto_register(void)
 280 {
 281         memset(&qat_crypto, 0, sizeof(qat_crypto));
 282         qat_crypto.event_hld = qat_crypto_event_handler;
 283         qat_crypto.name = "qat_crypto";
 284         return adf_service_register(&qat_crypto);
 285 }
 286
 287 int qat_crypto_unregister(void)
 288 {
 289         return adf_service_unregister(&qat_crypto);
 290 }