drivers/crypto/qat/qat_common/adf_init.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2014 - 2020 Intel Corporation */
   3 #include <linux/mutex.h>
   4 #include <linux/list.h>
   5 #include <linux/bitops.h>
   6 #include <linux/delay.h>
   7 #include "adf_accel_devices.h"
   8 #include "adf_cfg.h"
   9 #include "adf_common_drv.h"
  10
  11 static LIST_HEAD(service_table);
  12 static DEFINE_MUTEX(service_lock);
  13
  14 static void adf_service_add(struct service_hndl *service)
  15 {
  16         mutex_lock(&service_lock);
  17         list_add(&service->list, &service_table);
  18         mutex_unlock(&service_lock);
  19 }
  20
  21 int adf_service_register(struct service_hndl *service)
  22 {
  23         memset(service->init_status, 0, sizeof(service->init_status));
  24         memset(service->start_status, 0, sizeof(service->start_status));
  25         adf_service_add(service);
  26         return 0;
  27 }
  28
  29 static void adf_service_remove(struct service_hndl *service)
  30 {
  31         mutex_lock(&service_lock);
  32         list_del(&service->list);
  33         mutex_unlock(&service_lock);
  34 }
  35
  36 int adf_service_unregister(struct service_hndl *service)
  37 {
  38         int i;
  39
  40         for (i = 0; i < ARRAY_SIZE(service->init_status); i++) {
  41                 if (service->init_status[i] || service->start_status[i]) {
  42                         pr_err("QAT: Could not remove active service\n");
  43                         return -EFAULT;
  44                 }
  45         }
  46         adf_service_remove(service);
  47         return 0;
  48 }
  49
  50 /**
  51  * adf_dev_init() - Init data structures and services for the given accel device
  52  * @accel_dev: Pointer to acceleration device.
  53  *
  54  * Initialize the ring data structures and the admin comms and arbitration
  55  * services.
  56  *
  57  * Return: 0 on success, error code otherwise.
  58  */
  59 int adf_dev_init(struct adf_accel_dev *accel_dev)
  60 {
  61         struct service_hndl *service;
  62         struct list_head *list_itr;
  63         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
  64         int ret;
  65
  66         if (!hw_data) {
  67                 dev_err(&GET_DEV(accel_dev),
  68                         "Failed to init device - hw_data not set\n");
  69                 return -EFAULT;
  70         }
  71
  72         if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status) &&
  73             !accel_dev->is_vf) {
  74                 dev_err(&GET_DEV(accel_dev), "Device not configured\n");
  75                 return -EFAULT;
  76         }
  77
  78         if (adf_init_etr_data(accel_dev)) {
  79                 dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
  80                 return -EFAULT;
  81         }
  82
  83         if (hw_data->init_device && hw_data->init_device(accel_dev)) {
  84                 dev_err(&GET_DEV(accel_dev), "Failed to initialize device\n");
  85                 return -EFAULT;
  86         }
  87
  88         if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
  89                 dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
  90                 return -EFAULT;
  91         }
  92
  93         if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
  94                 dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
  95                 return -EFAULT;
  96         }
  97
  98         if (adf_ae_init(accel_dev)) {
  99                 dev_err(&GET_DEV(accel_dev),
 100                         "Failed to initialise Acceleration Engine\n");
 101                 return -EFAULT;
 102         }
 103         set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
 104
 105         if (adf_ae_fw_load(accel_dev)) {
 106                 dev_err(&GET_DEV(accel_dev),
 107                         "Failed to load acceleration FW\n");
 108                 return -EFAULT;
 109         }
 110         set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 111
 112         if (hw_data->alloc_irq(accel_dev)) {
 113                 dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
 114                 return -EFAULT;
 115         }
 116         set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 117
 118         hw_data->enable_ints(accel_dev);
 119         hw_data->enable_error_correction(accel_dev);
 120
 121         ret = hw_data->pfvf_ops.enable_comms(accel_dev);
 122         if (ret)
 123                 return ret;
 124
 125         if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status) &&
 126             accel_dev->is_vf) {
 127                 if (qat_crypto_vf_dev_config(accel_dev))
 128                         return -EFAULT;
 129         }
 130
 131         /*
 132          * Subservice initialisation is divided into two stages: init and start.
 133          * This is to facilitate any ordering dependencies between services
 134          * prior to starting any of the accelerators.
 135          */
 136         list_for_each(list_itr, &service_table) {
 137                 service = list_entry(list_itr, struct service_hndl, list);
 138                 if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
 139                         dev_err(&GET_DEV(accel_dev),
 140                                 "Failed to initialise service %s\n",
 141                                 service->name);
 142                         return -EFAULT;
 143                 }
 144                 set_bit(accel_dev->accel_id, service->init_status);
 145         }
 146
 147         return 0;
 148 }
 149 EXPORT_SYMBOL_GPL(adf_dev_init);
 150
 151 /**
 152  * adf_dev_start() - Start acceleration service for the given accel device
 153  * @accel_dev:    Pointer to acceleration device.
 154  *
 155  * Function notifies all the registered services that the acceleration device
 156  * is ready to be used.
 157  * To be used by QAT device specific drivers.
 158  *
 159  * Return: 0 on success, error code otherwise.
 160  */
 161 int adf_dev_start(struct adf_accel_dev *accel_dev)
 162 {
 163         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 164         struct service_hndl *service;
 165         struct list_head *list_itr;
 166
 167         set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 168
 169         if (adf_ae_start(accel_dev)) {
 170                 dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
 171                 return -EFAULT;
 172         }
 173         set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 174
 175         if (hw_data->send_admin_init(accel_dev)) {
 176                 dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
 177                 return -EFAULT;
 178         }
 179
 180         /* Set ssm watch dog timer */
 181         if (hw_data->set_ssm_wdtimer)
 182                 hw_data->set_ssm_wdtimer(accel_dev);
 183
 184         /* Enable Power Management */
 185         if (hw_data->enable_pm && hw_data->enable_pm(accel_dev)) {
 186                 dev_err(&GET_DEV(accel_dev), "Failed to configure Power Management\n");
 187                 return -EFAULT;
 188         }
 189
 190         list_for_each(list_itr, &service_table) {
 191                 service = list_entry(list_itr, struct service_hndl, list);
 192                 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
 193                         dev_err(&GET_DEV(accel_dev),
 194                                 "Failed to start service %s\n",
 195                                 service->name);
 196                         return -EFAULT;
 197                 }
 198                 set_bit(accel_dev->accel_id, service->start_status);
 199         }
 200
 201         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 202         set_bit(ADF_STATUS_STARTED, &accel_dev->status);
 203
 204         if (!list_empty(&accel_dev->crypto_list) &&
 205             (qat_algs_register() || qat_asym_algs_register())) {
 206                 dev_err(&GET_DEV(accel_dev),
 207                         "Failed to register crypto algs\n");
 208                 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 209                 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 210                 return -EFAULT;
 211         }
 212         return 0;
 213 }
 214 EXPORT_SYMBOL_GPL(adf_dev_start);
 215
 216 /**
 217  * adf_dev_stop() - Stop acceleration service for the given accel device
 218  * @accel_dev:    Pointer to acceleration device.
 219  *
 220  * Function notifies all the registered services that the acceleration device
 221  * is shuting down.
 222  * To be used by QAT device specific drivers.
 223  *
 224  * Return: void
 225  */
 226 void adf_dev_stop(struct adf_accel_dev *accel_dev)
 227 {
 228         struct service_hndl *service;
 229         struct list_head *list_itr;
 230         bool wait = false;
 231         int ret;
 232
 233         if (!adf_dev_started(accel_dev) &&
 234             !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
 235                 return;
 236
 237         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 238         clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 239
 240         if (!list_empty(&accel_dev->crypto_list)) {
 241                 qat_algs_unregister();
 242                 qat_asym_algs_unregister();
 243         }
 244
 245         list_for_each(list_itr, &service_table) {
 246                 service = list_entry(list_itr, struct service_hndl, list);
 247                 if (!test_bit(accel_dev->accel_id, service->start_status))
 248                         continue;
 249                 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
 250                 if (!ret) {
 251                         clear_bit(accel_dev->accel_id, service->start_status);
 252                 } else if (ret == -EAGAIN) {
 253                         wait = true;
 254                         clear_bit(accel_dev->accel_id, service->start_status);
 255                 }
 256         }
 257
 258         if (wait)
 259                 msleep(100);
 260
 261         if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
 262                 if (adf_ae_stop(accel_dev))
 263                         dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
 264                 else
 265                         clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 266         }
 267 }
 268 EXPORT_SYMBOL_GPL(adf_dev_stop);
 269
 270 /**
 271  * adf_dev_shutdown() - shutdown acceleration services and data strucutures
 272  * @accel_dev: Pointer to acceleration device
 273  *
 274  * Cleanup the ring data structures and the admin comms and arbitration
 275  * services.
 276  */
 277 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
 278 {
 279         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 280         struct service_hndl *service;
 281         struct list_head *list_itr;
 282
 283         if (!hw_data) {
 284                 dev_err(&GET_DEV(accel_dev),
 285                         "QAT: Failed to shutdown device - hw_data not set\n");
 286                 return;
 287         }
 288
 289         if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
 290                 adf_ae_fw_release(accel_dev);
 291                 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 292         }
 293
 294         if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
 295                 if (adf_ae_shutdown(accel_dev))
 296                         dev_err(&GET_DEV(accel_dev),
 297                                 "Failed to shutdown Accel Engine\n");
 298                 else
 299                         clear_bit(ADF_STATUS_AE_INITIALISED,
 300                                   &accel_dev->status);
 301         }
 302
 303         list_for_each(list_itr, &service_table) {
 304                 service = list_entry(list_itr, struct service_hndl, list);
 305                 if (!test_bit(accel_dev->accel_id, service->init_status))
 306                         continue;
 307                 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
 308                         dev_err(&GET_DEV(accel_dev),
 309                                 "Failed to shutdown service %s\n",
 310                                 service->name);
 311                 else
 312                         clear_bit(accel_dev->accel_id, service->init_status);
 313         }
 314
 315         hw_data->disable_iov(accel_dev);
 316
 317         if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
 318                 hw_data->free_irq(accel_dev);
 319                 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 320         }
 321
 322         /* Delete configuration only if not restarting */
 323         if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
 324                 adf_cfg_del_all(accel_dev);
 325
 326         if (hw_data->exit_arb)
 327                 hw_data->exit_arb(accel_dev);
 328
 329         if (hw_data->exit_admin_comms)
 330                 hw_data->exit_admin_comms(accel_dev);
 331
 332         adf_cleanup_etr_data(accel_dev);
 333         adf_dev_restore(accel_dev);
 334 }
 335 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 336
 337 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
 338 {
 339         struct service_hndl *service;
 340         struct list_head *list_itr;
 341
 342         list_for_each(list_itr, &service_table) {
 343                 service = list_entry(list_itr, struct service_hndl, list);
 344                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
 345                         dev_err(&GET_DEV(accel_dev),
 346                                 "Failed to restart service %s.\n",
 347                                 service->name);
 348         }
 349         return 0;
 350 }
 351
 352 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
 353 {
 354         struct service_hndl *service;
 355         struct list_head *list_itr;
 356
 357         list_for_each(list_itr, &service_table) {
 358                 service = list_entry(list_itr, struct service_hndl, list);
 359                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
 360                         dev_err(&GET_DEV(accel_dev),
 361                                 "Failed to restart service %s.\n",
 362                                 service->name);
 363         }
 364         return 0;
 365 }
 366
 367 int adf_dev_shutdown_cache_cfg(struct adf_accel_dev *accel_dev)
 368 {
 369         char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
 370         int ret;
 371
 372         ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
 373                                       ADF_SERVICES_ENABLED, services);
 374
 375         adf_dev_stop(accel_dev);
 376         adf_dev_shutdown(accel_dev);
 377
 378         if (!ret) {
 379                 ret = adf_cfg_section_add(accel_dev, ADF_GENERAL_SEC);
 380                 if (ret)
 381                         return ret;
 382
 383                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
 384                                                   ADF_SERVICES_ENABLED,
 385                                                   services, ADF_STR);
 386                 if (ret)
 387                         return ret;
 388         }
 389
 390         return 0;
 391 }