drivers/crypto/qat/qat_common/qat_crypto.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2014 - 2020 Intel Corporation */
   3 #include <linux/module.h>
   4 #include <linux/slab.h>
   5 #include "adf_accel_devices.h"
   6 #include "adf_common_drv.h"
   7 #include "adf_transport.h"
   8 #include "adf_transport_access_macros.h"
   9 #include "adf_cfg.h"
  10 #include "adf_cfg_strings.h"
  11 #include "qat_crypto.h"
  12 #include "icp_qat_fw.h"
  13
  14 #define SEC ADF_KERNEL_SEC
  15
  16 static struct service_hndl qat_crypto;
  17
  18 void qat_crypto_put_instance(struct qat_crypto_instance *inst)
  19 {
  20         atomic_dec(&inst->refctr);
  21         adf_dev_put(inst->accel_dev);
  22 }
  23
  24 static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
  25 {
  26         struct qat_crypto_instance *inst, *tmp;
  27         int i;
  28
  29         list_for_each_entry_safe(inst, tmp, &accel_dev->crypto_list, list) {
  30                 for (i = 0; i < atomic_read(&inst->refctr); i++)
  31                         qat_crypto_put_instance(inst);
  32
  33                 if (inst->sym_tx)
  34                         adf_remove_ring(inst->sym_tx);
  35
  36                 if (inst->sym_rx)
  37                         adf_remove_ring(inst->sym_rx);
  38
  39                 if (inst->pke_tx)
  40                         adf_remove_ring(inst->pke_tx);
  41
  42                 if (inst->pke_rx)
  43                         adf_remove_ring(inst->pke_rx);
  44
  45                 list_del(&inst->list);
  46                 kfree(inst);
  47         }
  48         return 0;
  49 }
  50
  51 struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
  52 {
  53         struct adf_accel_dev *accel_dev = NULL, *tmp_dev;
  54         struct qat_crypto_instance *inst = NULL, *tmp_inst;
  55         unsigned long best = ~0;
  56
  57         list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
  58                 unsigned long ctr;
  59
  60                 if ((node == dev_to_node(&GET_DEV(tmp_dev)) ||
  61                      dev_to_node(&GET_DEV(tmp_dev)) < 0) &&
  62                     adf_dev_started(tmp_dev) &&
  63                     !list_empty(&tmp_dev->crypto_list)) {
  64                         ctr = atomic_read(&tmp_dev->ref_count);
  65                         if (best > ctr) {
  66                                 accel_dev = tmp_dev;
  67                                 best = ctr;
  68                         }
  69                 }
  70         }
  71
  72         if (!accel_dev) {
  73                 pr_info("QAT: Could not find a device on node %d\n", node);
  74                 /* Get any started device */
  75                 list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
  76                         if (adf_dev_started(tmp_dev) &&
  77                             !list_empty(&tmp_dev->crypto_list)) {
  78                                 accel_dev = tmp_dev;
  79                                 break;
  80                         }
  81                 }
  82         }
  83
  84         if (!accel_dev)
  85                 return NULL;
  86
  87         best = ~0;
  88         list_for_each_entry(tmp_inst, &accel_dev->crypto_list, list) {
  89                 unsigned long ctr;
  90
  91                 ctr = atomic_read(&tmp_inst->refctr);
  92                 if (best > ctr) {
  93                         inst = tmp_inst;
  94                         best = ctr;
  95                 }
  96         }
  97         if (inst) {
  98                 if (adf_dev_get(accel_dev)) {
  99                         dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
 100                         return NULL;
 101                 }
 102                 atomic_inc(&inst->refctr);
 103         }
 104         return inst;
 105 }
 106
 107 /**
 108  * qat_crypto_dev_config() - create dev config required to create crypto inst.
 109  *
 110  * @accel_dev: Pointer to acceleration device.
 111  *
 112  * Function creates device configuration required to create crypto instances
 113  *
 114  * Return: 0 on success, error code otherwise.
 115  */
 116 int qat_crypto_dev_config(struct adf_accel_dev *accel_dev)
 117 {
 118         int cpus = num_online_cpus();
 119         int banks = GET_MAX_BANKS(accel_dev);
 120         int instances = min(cpus, banks);
 121         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 122         int i;
 123         unsigned long val;
 124
 125         if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
 126                 goto err;
 127         if (adf_cfg_section_add(accel_dev, "Accelerator0"))
 128                 goto err;
 129
 130         /* Temporarily set the number of crypto instances to zero to avoid
 131          * registering the crypto algorithms.
 132          * This will be removed when the algorithms will support the
 133          * CRYPTO_TFM_REQ_MAY_BACKLOG flag
 134          */
 135         instances = 0;
 136
 137         for (i = 0; i < instances; i++) {
 138                 val = i;
 139                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 140                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 141                                                 key, (void *)&val, ADF_DEC))
 142                         goto err;
 143
 144                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_ETRMGR_CORE_AFFINITY,
 145                          i);
 146                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 147                                                 key, (void *)&val, ADF_DEC))
 148                         goto err;
 149
 150                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 151                 val = 128;
 152                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 153                                                 key, (void *)&val, ADF_DEC))
 154                         goto err;
 155
 156                 val = 512;
 157                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 158                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 159                                                 key, (void *)&val, ADF_DEC))
 160                         goto err;
 161
 162                 val = 0;
 163                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 164                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 165                                                 key, (void *)&val, ADF_DEC))
 166                         goto err;
 167
 168                 val = 2;
 169                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 170                 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 171                                                 key, (void *)&val, ADF_DEC))
 172                         goto err;
 173
 174                 val = 8;
 175                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, 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                 val = 10;
 181                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, 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                 val = ADF_COALESCING_DEF_TIME;
 187                 snprintf(key, sizeof(key), ADF_ETRMGR_COALESCE_TIMER_FORMAT, i);
 188                 if (adf_cfg_add_key_value_param(accel_dev, "Accelerator0",
 189                                                 key, (void *)&val, ADF_DEC))
 190                         goto err;
 191         }
 192
 193         val = i;
 194         if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 195                                         ADF_NUM_CY, (void *)&val, ADF_DEC))
 196                 goto err;
 197
 198         set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
 199         return 0;
 200 err:
 201         dev_err(&GET_DEV(accel_dev), "Failed to start QAT accel dev\n");
 202         return -EINVAL;
 203 }
 204 EXPORT_SYMBOL_GPL(qat_crypto_dev_config);
 205
 206 static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
 207 {
 208         int i;
 209         unsigned long bank;
 210         unsigned long num_inst, num_msg_sym, num_msg_asym;
 211         int msg_size;
 212         struct qat_crypto_instance *inst;
 213         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 214         char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
 215
 216         INIT_LIST_HEAD(&accel_dev->crypto_list);
 217         if (adf_cfg_get_param_value(accel_dev, SEC, ADF_NUM_CY, val))
 218                 return -EFAULT;
 219
 220         if (kstrtoul(val, 0, &num_inst))
 221                 return -EFAULT;
 222
 223         for (i = 0; i < num_inst; i++) {
 224                 inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
 225                                     dev_to_node(&GET_DEV(accel_dev)));
 226                 if (!inst)
 227                         goto err;
 228
 229                 list_add_tail(&inst->list, &accel_dev->crypto_list);
 230                 inst->id = i;
 231                 atomic_set(&inst->refctr, 0);
 232                 inst->accel_dev = accel_dev;
 233                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);
 234                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 235                         goto err;
 236
 237                 if (kstrtoul(val, 10, &bank))
 238                         goto err;
 239                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 240                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 241                         goto err;
 242
 243                 if (kstrtoul(val, 10, &num_msg_sym))
 244                         goto err;
 245
 246                 num_msg_sym = num_msg_sym >> 1;
 247
 248                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 249                 if (adf_cfg_get_param_value(accel_dev, SEC, key, val))
 250                         goto err;
 251
 252                 if (kstrtoul(val, 10, &num_msg_asym))
 253                         goto err;
 254                 num_msg_asym = num_msg_asym >> 1;
 255
 256                 msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
 257                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 258                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 259                                     msg_size, key, NULL, 0, &inst->sym_tx))
 260                         goto err;
 261
 262                 msg_size = msg_size >> 1;
 263                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 264                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 265                                     msg_size, key, NULL, 0, &inst->pke_tx))
 266                         goto err;
 267
 268                 msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
 269                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 270                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_sym,
 271                                     msg_size, key, qat_alg_callback, 0,
 272                                     &inst->sym_rx))
 273                         goto err;
 274
 275                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 276                 if (adf_create_ring(accel_dev, SEC, bank, num_msg_asym,
 277                                     msg_size, key, qat_alg_asym_callback, 0,
 278                                     &inst->pke_rx))
 279                         goto err;
 280         }
 281         return 0;
 282 err:
 283         qat_crypto_free_instances(accel_dev);
 284         return -ENOMEM;
 285 }
 286
 287 static int qat_crypto_init(struct adf_accel_dev *accel_dev)
 288 {
 289         if (qat_crypto_create_instances(accel_dev))
 290                 return -EFAULT;
 291
 292         return 0;
 293 }
 294
 295 static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
 296 {
 297         return qat_crypto_free_instances(accel_dev);
 298 }
 299
 300 static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
 301                                     enum adf_event event)
 302 {
 303         int ret;
 304
 305         switch (event) {
 306         case ADF_EVENT_INIT:
 307                 ret = qat_crypto_init(accel_dev);
 308                 break;
 309         case ADF_EVENT_SHUTDOWN:
 310                 ret = qat_crypto_shutdown(accel_dev);
 311                 break;
 312         case ADF_EVENT_RESTARTING:
 313         case ADF_EVENT_RESTARTED:
 314         case ADF_EVENT_START:
 315         case ADF_EVENT_STOP:
 316         default:
 317                 ret = 0;
 318         }
 319         return ret;
 320 }
 321
 322 int qat_crypto_register(void)
 323 {
 324         memset(&qat_crypto, 0, sizeof(qat_crypto));
 325         qat_crypto.event_hld = qat_crypto_event_handler;
 326         qat_crypto.name = "qat_crypto";
 327         return adf_service_register(&qat_crypto);
 328 }
 329
 330 int qat_crypto_unregister(void)
 331 {
 332         return adf_service_unregister(&qat_crypto);
 333 }