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